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15
Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved Introduction to Organic Chemistry: Hydrocarbons Chapter 12 Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved Chapter 12 12.1 Organic Compounds 12.2 Alkanes 12.3 Alkanes with Substituents 12.4 Properties of Alkanes 12.5 Alkenes and Alkynes 12.6 Cis-Trans Isomers 12.7 Addition Reactions for Alkenes 12.8 Aromatic Compounds 12.1 – Organic Compounds Identify properties characteristic of organic or inorganic compounds. Organic Compounds Organic chemistry is the study of carbon compounds. An organic compound Always contains carbon and hydrogen atoms May also contain other nonmetals such as oxygen, nitrogen, phosphorus, or a halogen. Organic compounds are found in: Gasoline, medicines, shampoos, plastics, and perfumes Carbohydrates, fats, and proteins

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Page 1: Copyright © 2016, 2013, 2010 Pearson Education, Inc. …ion.chem.usu.edu/~scheiner/LundellChemistry/lecture...Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

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ion,

Inc

. All

Rig

hts

Res

erve

d

Intr

oduc

tion

to O

rgan

ic C

hem

istr

y:H

ydro

carb

ons

Cha

pter

12

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

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n Ed

ucat

ion,

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. All

Rig

hts

Res

erve

d

Cha

pter

1212

.1 –

Org

anic

Com

poun

ds

12.2

–Al

kane

s

12.3

–Al

kane

s w

ith S

ubst

ituen

ts

12.4

–Pr

oper

ties

of A

lkan

es

12.5

–Al

kene

san

dAl

kyne

s

12.6

–C

is-T

rans

Isom

ers

12.7

–Ad

ditio

nR

eact

ions

forA

lken

es

12.8

–Ar

omat

ic C

ompo

unds

12.1

–Organ

icCo

mpo

unds

Iden

tify

prop

ertie

s cha

ract

erist

ic of

org

anic

or in

orga

nic

com

poun

ds.

Org

anic

Com

poun

dsOr

gani

c che

mist

ryis

the

stud

y of

carb

on co

mpo

unds

.An

orga

nicc

ompo

und

•Al

way

scon

tain

scar

bon

and

hydr

ogen

atom

s•M

ay a

lso co

ntai

n ot

her n

onm

etal

s suc

h as

oxy

gen,

nitr

ogen

, ph

osph

orus

, or a

hal

ogen

.•O

rgan

icco

mpo

unds

are

foun

din

:•

Gaso

line,

med

icine

s, sh

ampo

os, p

last

ics, a

nd p

erfu

mes

•Ca

rboh

ydra

tes,

fats

,and

prot

eins

Page 2: Copyright © 2016, 2013, 2010 Pearson Education, Inc. …ion.chem.usu.edu/~scheiner/LundellChemistry/lecture...Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved

Func

tiona

l Gro

ups

•O

rgan

ic co

mpo

unds

are

org

anize

d by

thei

r fun

ctio

nal g

roup

s(gr

oups

of

atom

s bon

ded

in a

spec

ific

way

).

•Co

mpo

unds

that

cont

ain

the

sam

e fu

nctio

nal g

roup

s hav

e sim

ilar

phys

ical a

nd ch

emica

l pro

pert

ies.

•Th

eid

entif

icatio

nof

func

tiona

lgro

upsa

llow

sust

ocla

ssify

orga

nic

com

poun

dsac

cord

ing

toth

eirs

truc

ture

, to

nam

e co

mpo

unds

with

in

each

fam

ily, a

nd to

pre

dict

thei

r che

mica

l rea

ctio

ns.

Cop

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ht ©

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. All

Rig

hts

Res

erve

d

Org

anic

vs.

Inor

gani

c•In

che

mis

try, m

olec

ules

are

cla

ssifi

ed a

s O

rgan

ic o

r In

orga

nic.

•In

orga

nic

com

poun

dsar

e (q

uite

exp

ansi

vely

) an

ythi

ng th

at is

not

org

anic

.

•O

rgan

ican

dIn

orga

nic

com

poun

dsha

vedi

ffere

ntpr

oper

ties.

–O

rgan

ic c

ompo

unds

:H

ave

low

mel

ting

and

boilin

gpo

ints

.Ar

e fla

mm

able

and

und

ergo

com

bust

ion.

Are

nots

olub

lein

wat

er.

–In

orga

nic

com

poun

dsM

any

inor

gani

c co

mpo

unds

hav

e hi

gh

mel

ting

and

boilin

g po

ints

.In

orga

nic

com

poun

dsth

atar

eio

nic

are

usua

llyso

lubl

ein

wat

er,a

ndm

ostd

ono

tbu

rnin

air.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

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ion,

Inc

. All

Rig

hts

Res

erve

dCop

yrig

ht ©

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6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Prac

tice

Iden

tify

each

cha

ract

eris

tic a

s m

ost t

ypic

al o

f com

poun

ds

that

are

inor

gani

c or

org

anic

.

A. It

has

a h

igh

mel

ting

poin

t.

B. It

is n

ot s

olub

le in

wat

er.

C. I

t con

tain

s ca

rbon

and

hyd

roge

n at

oms.

D. I

t has

the

form

ula

MgC

l 2.

E. It

bur

ns e

asily

in a

ir.

Page 3: Copyright © 2016, 2013, 2010 Pearson Education, Inc. …ion.chem.usu.edu/~scheiner/LundellChemistry/lecture...Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Rep

rese

ntat

ions

of C

arbo

n C

ompo

unds

•H

ydro

carb

ons

are

orga

nic

com

poun

ds th

at c

onsi

st o

f onl

y ca

rbon

and

hy

drog

en.

–In

orga

nic

mol

ecul

es,e

very

carb

onat

omha

s fo

ur b

onds

. –

Inm

etha

ne(C

H4)

,the

carb

onat

om fo

rms

an o

ctet

by

shar

ing

its fo

ur

vale

nce

elec

trons

with

four

hyd

roge

n at

oms.

Thre

e-di

men

sion

alan

dtw

o-di

men

sion

alre

pres

enta

tions

ofm

etha

ne:a

)sp

ace-

fillin

gm

odel

,b)b

all-a

nd-s

tick

mod

el, c

) wed

ge-d

ash

mod

el, d

) ex

pand

ed s

truct

ural

form

ula,

and

e) c

onde

nsed

stru

ctur

al fo

rmul

a

Cop

yrig

ht ©

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ion,

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. All

Rig

hts

Res

erve

d

Rep

rese

ntat

ions

of C

arbo

n C

ompo

unds

•In

eth

ane

(C2H

6), e

ach

tetra

hedr

al c

arbo

n fo

rms

thre

e co

vale

nt b

onds

to

hydr

ogen

and

one

to th

e ot

her c

arbo

n.

Cop

yrig

ht ©

201

6, 2

013,

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. All

Rig

hts

Res

erve

d

Alk

anes

Alka

nes

•ar

e fo

rmed

by

a co

ntin

uous

cha

in o

f car

bon

atom

s.

•ar

e na

med

usi

ng th

e IU

PAC

(Inte

rnat

iona

l Uni

on o

f Pur

e an

d Ap

plie

d C

hem

istry

) sys

tem

.

•ha

ve n

ames

that

end

in a

ne.

•us

e G

reek

pre

fixes

to n

ame

carb

on c

hain

s w

ith fi

ve o

r m

ore

carb

on a

tom

s.

Cop

yrig

ht ©

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013,

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n Ed

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ion,

Inc

. All

Rig

hts

Res

erve

d

Stud

y C

heck

In th

e bu

tane

mol

ecul

e (C

4H10

), pr

edic

t the

sha

pe a

roun

d ea

ch c

arbo

n at

om.

CH H

HCH H

CH H

CH H

H

Page 4: Copyright © 2016, 2013, 2010 Pearson Education, Inc. …ion.chem.usu.edu/~scheiner/LundellChemistry/lecture...Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Cha

pter

1212

.1 –

Org

anic

Com

poun

ds

12.2

–Al

kane

s

12.3

–Al

kane

s w

ith S

ubst

ituen

ts

12.4

–Pr

oper

ties

of A

lkan

es

12.5

–Al

kene

san

dAl

kyne

s

12.6

–C

is-T

rans

Isom

ers

12.7

–Ad

ditio

nR

eact

ions

forA

lken

es

12.8

–Ar

omat

ic C

ompo

unds

Cop

yrig

ht ©

201

6, 2

013,

201

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n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

12.2

-A

lkan

esW

rite

the

IUPA

C n

ames

and

dra

w th

e co

nden

sed

or li

ne-a

ngle

stru

ctur

al

form

ulas

for a

lkan

es a

nd c

yclo

alka

nes.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Alka

nes

•M

ore

than

90%

of t

he c

ompo

unds

in

the

wor

ld a

re o

rgan

ic c

ompo

unds

.

•Th

ela

rger

num

bero

fcar

bon

com

poun

dsis

pos

sibl

e be

caus

e th

e co

vale

nt b

onds

bet

wee

n ca

rbon

at

oms

(C-C

) is

very

stro

ng, a

llow

ing

carb

on a

tom

s to

form

long

, sta

ble

chai

ns.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Alka

nes

•Th

e al

kane

sar

e a

type

of h

ydro

carb

on in

whi

ch th

e ca

rbon

ato

ms

are

conn

ecte

d on

ly b

y si

ngle

bon

ds.

–Al

kane

sar

efo

rmed

bya

cont

inuo

usch

ain

ofca

rbon

atom

s.–

The

nam

es o

f alk

anes

and

in –

ane.

Such

nam

esar

epa

rtof

the

IUPA

Csy

stem

(Inte

rnat

iona

lUni

on

of P

ure

and

Appl

ied

Che

mis

try) u

sed

by c

hem

ists

to n

ame

orga

nic

chem

istry

.–

Alka

nes

mad

eof

carb

onch

ains

are

nam

ed b

ased

on

how

man

y ca

rbon

s m

ake

up th

e ch

ain.

–O

ne o

f the

mos

t com

mon

use

s of

alk

anes

is a

s fu

els.

Met

hane

,pro

pane

,oct

ane,

and

hex

ane

are

all a

lkan

es u

sed

as fu

els.

Page 5: Copyright © 2016, 2013, 2010 Pearson Education, Inc. …ion.chem.usu.edu/~scheiner/LundellChemistry/lecture...Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

IUPA

C N

ames

of A

lkan

es

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Line

-Ang

le S

truc

tura

l For

mul

asA

sim

plifi

ed s

truct

ure

of o

rgan

ic m

olec

ules

•is

cal

led

the

line-

angl

e st

ruct

ural

form

ula.

•sh

ows

a zi

gzag

line

in w

hich

car

bon

atom

s ar

e re

pres

ente

d as

the

ends

of e

ach

line

and

as c

orne

rs.

Car

bon

atom

s

•at

the

end

are

bond

ed to

thre

e hy

drog

en a

tom

s.

•in

the

mid

dle

are

bond

ed to

two

hydr

ogen

ato

ms.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Con

dens

ed fo

rmul

a an

d Li

ne-a

ngle

form

ula

•Pe

ntan

e

Cop

yrig

ht ©

201

6, 2

013,

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0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Con

dens

ed fo

rmul

a an

d Li

ne-a

ngle

form

ula

•D

raw

the

cond

ense

d st

ruct

ural

form

ula

and

nam

e th

e m

olec

ule:

Page 6: Copyright © 2016, 2013, 2010 Pearson Education, Inc. …ion.chem.usu.edu/~scheiner/LundellChemistry/lecture...Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved

Cop

yrig

ht ©

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6, 2

013,

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0Pe

arso

n Ed

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ion,

Inc

. All

Rig

hts

Res

erve

d

Gui

de to

Dra

win

g St

ruct

ural

For

mul

as fo

r A

lkan

esSt

ep 1

: Dra

w th

e ca

rbon

cha

in.

Step

2: D

raw

the

expa

nded

stru

ctur

al fo

rmul

a by

add

ing

the

hydr

ogen

ato

ms

usin

g si

ngle

bon

ds to

eac

h of

the

carb

on a

tom

s.

Step

3: D

raw

the

cond

ense

d st

ruct

ural

form

ula

by c

ombi

ning

th

e H

ato

ms

with

eac

h C

ato

m.

Step

4: D

raw

the

line-

angl

e st

ruct

ural

form

ula

as a

zig

zag

line

in w

hich

the

ends

and

cor

ners

repr

esen

t C

atom

s.

Cop

yrig

ht ©

201

6, 2

013,

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0Pe

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n Ed

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ion,

Inc

. All

Rig

hts

Res

erve

d

Dra

win

g Ex

pand

ed, C

onde

nsed

, and

Lin

e-A

ngle

Str

uctu

ral F

orm

ulas

(1 o

f 3)

Dra

w th

e ex

pand

ed, c

onde

nsed

, and

line

-ang

le s

truct

ural

fo

rmul

a fo

r pen

tane

.

Step

1: D

raw

the

carb

on c

hain

. A m

olec

ule

of p

enta

ne h

as

five

carb

on a

tom

s in

a c

ontin

uous

cha

in.

Step

2:D

raw

the

expa

nded

str

uctu

ral f

orm

ula

by a

ddin

g th

e hy

drog

en a

tom

s, u

sing

sin

gle

bond

s to

eac

h of

the

carb

on a

tom

s.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

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n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Dra

win

g Ex

pand

ed, C

onde

nsed

, and

Lin

e-A

ngle

Str

uctu

ral F

orm

ulas

(2 o

f 3)

Dra

w th

e ex

pand

ed, c

onde

nsed

, and

line

-ang

le s

truct

ural

fo

rmul

a fo

r pen

tane

.

Step

3: D

raw

the

cond

ense

d st

ruct

ural

form

ula

by

com

bini

ng th

e H

ato

ms

with

eac

h C

ato

m.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Dra

win

g Ex

pand

ed, C

onde

nsed

, and

Lin

e-A

ngle

Str

uctu

ral F

orm

ulas

(3 o

f 3)

Dra

w th

e ex

pand

ed, c

onde

nsed

, and

line

-ang

le s

truct

ural

fo

rmul

a fo

r pen

tane

.

Step

4: D

raw

the

line-

angl

e st

ruct

ural

form

ula

as a

zi

gzag

line

in w

hich

the

ends

and

cor

ners

re

pres

ent C

ato

ms.

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yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Con

form

atio

ns o

f Alk

anes

•Si

ngle

bon

ds c

an s

pin

and

rota

te.

•Th

usdi

ffere

ntar

rang

emen

ts,k

now

n as

con

form

atio

ns, o

ccur

dur

ing

the

rota

tion

abou

t a s

ingl

e bo

nd.

•ht

tp://

sym

met

ry.o

tterb

ein.

edu/

galle

ry/in

dex.

htm

l

Cop

yrig

ht ©

201

6, 2

013,

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0Pe

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n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Stru

ctur

al F

orm

ulas

: C4H

10

As b

utan

e (C

4H10

) rot

ates

, som

etim

es th

elin

e up

in fr

ont o

f eac

h ot

her,

and

at o

ther

tim

es th

ey a

re

oppo

site

eac

h ot

her.

Buta

ne c

an b

e dr

awn

usin

g a

varie

ty o

f tw

o-di

men

sion

al c

onde

nsed

stru

ctur

al fo

rmul

as:

Cop

yrig

ht ©

201

6, 2

013,

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0Pe

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n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Stru

ctur

al F

orm

ulas

: C4H

10

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Cyc

loal

kane

s

Hyd

roca

rbon

s ca

n al

so fo

rm in

to c

ircle

s or

ring

s ca

lled:

cy

cloa

lkan

es

•ha

ve tw

o fe

wer

hyd

roge

n at

oms

than

the

open

cha

in fo

rm.

•ar

e na

med

by

usin

g th

e pr

efix

cyc

lobe

fore

the

nam

e of

th

e al

kane

cha

in w

ith th

e sa

me

num

ber o

f car

bon

atom

s.

Page 8: Copyright © 2016, 2013, 2010 Pearson Education, Inc. …ion.chem.usu.edu/~scheiner/LundellChemistry/lecture...Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved

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yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Form

ulas

of C

yclo

alka

nes

Tabl

e12

.4 F

orm

ulas

of S

ome

Com

mon

Cyc

loal

kane

sN

ame

BLA

NK

BLA

NK

BLA

NK

Cyc

lopr

opan

eC

yclo

buta

neC

yclo

pent

ane

Cyc

lohe

xane

Bal

l-and

-Stic

k M

odel

BLA

NK

BLA

NK

BLA

NK

Thre

e ca

rbon

s si

ngle

-bon

ded

to e

ach

othe

r in

a tri

angu

lar p

atte

rn,

with

eac

h ca

rbon

sin

gle-

bond

ed to

2 h

ydro

gens

.Th

e ba

ll an

d st

ick

mod

el s

how

s fo

ur

carb

ons

sing

le-b

onde

d to

eac

h ot

her i

n a

squa

re p

atte

rn, w

ith e

ach

carb

on s

ingl

e-

bond

ed to

2 h

ydro

gens.

The

ball

and

stic

k m

odel

sho

ws

five

carb

ons

sing

le-b

onde

d to

eac

h ot

her i

n a

pent

agon

al p

atte

rn, w

ith e

ach

carb

on

sing

le-b

onde

d to

2 h

ydro

gens

.

The

ball

and

stic

k m

odel

sho

ws

six

carb

ons

sing

le-b

onde

d to

eac

h ot

her i

n a

hexa

gona

l pat

tern

, with

eac

h ca

rbon

sing

le-b

onde

d to

2 h

ydro

gens.

Con

dens

ed S

truc

tura

l For

mul

aB

LAN

KB

LAN

KB

LAN

KTh

e co

nden

sed

stru

ctur

al fo

rmul

a sh

ows

a tri

angu

lar r

ing

of th

ree

C

H 2

mol

ecul

es.

The

cond

ense

d st

ruct

ural

form

ula

show

s a

squa

re ri

ng o

f fou

r C H

2 m

olec

ules

.Th

e co

nden

sed

stru

ctur

al fo

rmul

a sh

ows

a pe

ntag

onal

ring

of f

ive

C H

2

mol

ecul

es.

The

cond

ense

d st

ruct

ural

form

ula

show

s a

hexa

gona

l rin

g of

six

C H

2

mol

ecul

es.

Line

-Ang

le S

truc

tura

l For

mul

aB

LAN

KB

LAN

KB

LAN

KTh

e lin

e-an

gle

stru

ctur

al fo

rmul

a is

a tr

iang

le.

The

line-

angl

e st

ruct

ural

form

ula

show

s a

squa

re.

The

line-

angl

e st

ruct

ural

form

ula

show

s

a pe

ntag

on.

The

line-

angl

e st

ruct

ural

form

ula

show

s a

hexa

gon.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Stud

y C

heck

Giv

e th

e IU

PAC

nam

e fo

r eac

h of

the

follo

win

g co

mpo

unds

:

A. B.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Stud

y C

heck

Nam

e th

e fo

llow

ing

alka

nes:

A.

B. C.

D.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Cha

pter

1212

.1 –

Org

anic

Com

poun

ds

12.2

–Al

kane

s

12.3

–Al

kane

s w

ith S

ubst

ituen

ts

12.4

–Pr

oper

ties

of A

lkan

es

12.5

–Al

kene

san

dAl

kyne

s

12.6

–C

is-T

rans

Isom

ers

12.7

–Ad

ditio

nR

eact

ions

forA

lken

es

12.8

–Ar

omat

ic C

ompo

unds

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ht ©

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6, 2

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0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

12.3

–A

lkan

es a

nd S

ubst

ituen

tsW

rite

the

IUPA

C n

ames

for a

lkan

es w

ith s

ubst

ituen

ts a

nd d

raw

thei

r co

nden

sed

and

line-

angl

e st

ruct

ural

form

ulas

.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Stru

ctur

al Is

omer

sSt

ruct

ural

isom

ers

•ha

ve th

e sa

me

mol

ecul

ar fo

rmul

a w

ith a

diff

eren

t arra

ngem

ent

of a

tom

s.

•ha

ve th

e sa

me

num

ber o

f ato

ms

bond

ed in

a d

iffer

ent o

rder

.

Buta

ne (C

4H10

) has

two

stru

ctur

al is

omer

s: a

str

aigh

t cha

in a

nd a

br

anch

ed c

hain

.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Stud

y C

heck

D

raw

thre

e po

ssib

le s

truct

ural

isom

ers

of p

enta

ne

(C5H

12).

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Solu

tion

Dra

w th

ree

poss

ible

stru

ctur

al is

omer

s of

pen

tane

(C

5H12

).

Stru

ctur

al

Isom

ers

ofC

5H12

Stru

ctur

al Is

omer

s of

C5H

12St

ruct

ural

Isom

ers

of

C5H

12

Stru

ctur

al Is

omer

s of

C5H

12

Con

dens

edTh

e fir

st c

onde

nsed

stru

ctur

al fo

rmul

a is

a s

traig

ht c

hain

of s

ingl

e-bo

nded

mol

ecul

es a

s fo

llow

s. C

H 3

, C H

2, C

H 2

, C H

2, C

H 3

.Th

e se

cond

con

dens

ed s

truct

ural

form

ula

is a

bra

nche

d ch

ain

as fo

llow

s. C

H 3

, C H

sin

gle-

bond

ed to

C H

3 a

bove

, C

H 2

, C H

3.

The

third

con

dens

ed s

truct

ural

form

ula

is a

cen

tral C

si

ngle

-bon

ded

to fo

ur C

H 3

mol

ecul

es a

bove

, bel

ow,

right

war

d, a

nd le

ftwar

d.

Line

-Ang

leTh

e lin

e-an

gle

stru

ctur

al f

orm

ula

show

s a

zigz

ag li

ne m

ade

of 4

seg

men

ts f

orm

ing

3 an

gles

.Th

e lin

e-an

gle

stru

ctur

al f

orm

ula

show

s a

zigz

ag o

f 3 s

egm

ents

for

min

g 2

angl

es,

with

a

four

th s

egm

ent

risin

g ve

rtica

lly f

rom

the

first

ang

le.

The

line-

angl

e st

ruct

ural

for

mul

a sh

ows

2 ris

ing

and

fallin

g lin

e se

gmen

ts w

ith 2

seg

men

ts r

isin

g di

agon

ally

rig

ht a

nd le

ft fro

m th

e an

gle.

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ht ©

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013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Stud

y C

heck

Is

the

pair

offo

rmul

asst

ruct

ural

isom

ers?

Or t

hesa

me

mol

ecul

e?

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Subs

titue

nts

in A

lkan

es•

Whe

nC

H3

bran

ches

offo

fa c

arbo

n ch

ain,

it’s

cal

led

an a

lkyl

gro

up

•W

hen

aha

loge

n at

om(G

roup

17)i

sat

tach

edto

aca

rbon

chai

n,it

isna

med

asa

halo

grou

pw

ith th

e te

rms

–flu

oro,

-chl

oro,

-bro

mo,

-iod

oba

sed

on w

hich

ele

men

t it i

s.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Subs

titue

nts a

nd A

lkyl

Gro

ups

Tabl

e 12

.5 F

orm

ulas

and

Nam

es o

f Som

e C

omm

on S

ubst

ituen

ts

Form

ula

Nam

e

Form

ula,

C H

3, s

ingl

e bo

nd. n

ame,

met

hyl.

Form

ula,

stra

ight

cha

in, C

H 3

, C H

2,si

ngle

bo

nd. n

ame,

eth

yl.

BLA

NK

BLA

NK

Form

ula

Nam

e

Form

ula,

stra

ight

cha

in, C

H 3

, C H

2, C

H 2

, sin

gle

bond

. nam

e,

prop

yl.

Form

ula,

bra

nche

d ch

ain,

C H

3, C

H w

ith s

ingl

e bo

nd a

bove

, C

H 3.

nam

e, is

opropy

l.BL

ANK

BLAN

K

Form

ula

Nam

e

Form

ula,

stra

ight

cha

in, C

H 3

, C H

2, C

H 2

, C H

2, s

ingl

e bo

nd.

nam

e, b

utyl

.Fo

rmul

a, b

ranc

hed

chai

n, C

H 3

, C H

sin

gle-

bond

ed to

C H

3

abov

e, C

H 2

, sin

gle

bond

. nam

e, is

obut

yl.

Form

ula,

C H

3, C

H w

ith s

ingl

e bo

nd a

bove

, C

H 2

, C

H 3

. nam

e, s

econ

dary

but

yl.

Form

ula,

cen

tral C

with

sin

gle

bond

ab

ove

and

thre

e C

H 3

mol

ecul

es

belo

w, r

ight

war

d, a

nd le

ftwar

d.

nam

e, te

rtiar

y bu

tyl.

Form

ula

Nam

e

Form

ula,

F, s

ingl

e bo

nd. n

ame,

flu

oro.

Form

ula,

F, s

ingl

e bo

nd. n

ame,

flu

oro.

Form

ula,

B r,

sin

gle

bond

. nam

e, b

rom

o.Fo

rmul

a, I

, sin

gle

bond

. nam

e, io

do.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Nam

ing

Alka

nes

with

Sub

stitu

ents

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ht ©

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013,

201

0Pe

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ucat

ion,

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. All

Rig

hts

Res

erve

d

Nam

ing

Alka

nes

with

Sub

stitu

ents

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Nam

ing

Cyc

loal

kane

s w

ith S

ubst

ituen

ts

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Nam

ing

Cyc

loal

kane

s w

ith S

ubst

ituen

ts

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Nam

ing

Hal

oalk

anes

Hal

oalk

anes

•ar

e al

akan

es w

ith a

hal

ogen

ato

m th

at re

plac

es a

hyd

roge

n at

om.

•ar

e na

med

by

putti

ng th

e su

bstit

uent

s in

alp

habe

tical

ord

er.

•ha

ve th

e ha

lo g

roup

num

bere

d ac

cord

ing

to th

e ca

rbon

whe

re it

is

atta

ched

to th

e al

kane

.Ex

ampl

es o

f H

aloa

lkan

esB

LAN

KB

LAN

KB

LAN

KB

LAN

K

Form

ula

stra

ight

cha

in, C

H 3

, C l

stra

ight

cha

in, C

H 3

, C H

2, B

rB

ranc

hed

chai

n, C

H 3

, C H

sin

gle-

bond

ed to

an

F ab

ove

A c

entra

l C s

ingl

e-bo

nded

to C

l ab

ove

and

thre

e C

H 3

mol

ecul

es b

elow

, rig

htw

ard,

and

leftw

ard

IUPA

CC

hlor

omet

hane

Brom

oeth

ane

2-Fl

uoro

prop

ane

2-C

hlor

o-2-

met

hylp

ropa

ne

Com

mon

Met

hyl c

hlor

ide

Ethy

l bro

mid

eIs

opro

pyl f

luor

ide

Tert

-But

yl c

hlor

ide

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ht ©

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6, 2

013,

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0Pe

arso

n Ed

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ion,

Inc

. All

Rig

hts

Res

erve

d

Dra

win

gth

em

olec

ule

from

the

nam

eD

raw

the

cond

ense

d an

d lin

e-an

gle

stru

ctur

al fo

rmul

as fo

r 2,

3-di

met

hylb

utan

e.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Dra

win

gth

em

olec

ule

from

the

nam

eD

raw

the

cond

ense

d an

d lin

e-an

gle

stru

ctur

al fo

rmul

as fo

r 2-

brom

o-3-

ethy

l-4-m

ethy

lpen

tane

.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Cha

pter

1212

.1 –

Org

anic

Com

poun

ds

12.2

–Al

kane

s

12.3

–Al

kane

s w

ith S

ubst

ituen

ts

12.4

–Pr

oper

ties

of A

lkan

es

12.5

–Al

kene

san

dAl

kyne

s

12.6

–C

is-T

rans

Isom

ers

12.7

–Ad

ditio

nR

eact

ions

forA

lken

es

12.8

–Ar

omat

ic C

ompo

unds

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

12.4

–Pr

oper

ties

of A

lkan

esId

entif

y th

e pr

oper

ties

of a

lkan

es a

nd w

rite

a ba

lanc

ed c

hem

ical

eq

uatio

n fo

r com

bust

ion.

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ion,

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. All

Rig

hts

Res

erve

d

Prop

ertie

s of

Alk

anes

Man

yty

pes

ofal

kane

sar

eth

eco

mpo

nent

sof

fuel

sth

atpo

wer

ourc

ars

and

oilt

hat

heat

s ou

r hom

e.

The

solid

alka

nes

that

mak

eup

wax

yco

atin

gson

fruits

and

vege

tabl

es h

elp

reta

in m

oist

ure,

inhi

bit m

old,

and

enh

ance

ap

pear

ance

.

The

diffe

rent

uses

ofal

kane

com

poun

dsre

sult

from

thei

r phy

sica

l pro

perti

es,

incl

udin

g th

eir s

olub

ility

and

dens

ity.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Use

s of A

lkan

es (1

of 2

)

Alka

nes

with

one

to fo

ur c

arbo

ns a

re g

ases

at r

oom

te

mpe

ratu

re a

nd a

re w

idel

y us

ed a

s he

atin

g fu

els.

met

hane

, eth

ane,

pro

pane

, but

ane

But

ane

has

four

car

bons

:

Alka

nes

with

five

to e

ight

car

bons

are

hig

hly

vola

tile

liqui

ds

at ro

om te

mpe

ratu

re, w

hich

mak

es th

em u

sefu

l as

fuel

s.

pent

ane,

hex

ane,

hep

tane

, oct

ane

Oct

ane

has

eigh

t car

bons

:

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Use

s of A

lkan

es (2

of 2

)

Alka

nes

with

9−1

7 ca

rbon

s ar

e liq

uids

with

hig

her b

oilin

g po

ints

and

are

foun

d in

mot

or o

ils, m

iner

al o

il, k

eros

ene,

di

esel

, and

jet f

uels

.

Dec

ane

has

10 c

arbo

ns:

•Al

kane

s w

ith 1

8 or

mor

e ca

rbon

ato

ms,

kno

wn

as

para

ffins

, are

wax

y so

lids

at ro

om te

mpe

ratu

re.

•Pe

trole

um je

lly, o

r Vas

elin

e, is

a s

emis

olid

mix

ture

of

hydr

ocar

bons

with

mor

e th

an 2

5 ca

rbon

ato

ms.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Mel

ting

and

Boili

ng P

oint

s (1

of 4

)

Alka

nes

•ha

ve th

e lo

wes

t mel

ting

and

boilin

g po

ints

of o

rgan

ic

com

poun

ds.

•co

ntai

n on

ly th

e no

npol

ar b

onds

of

•ex

hibi

t onl

y w

eak

disp

ersi

on fo

rces

in th

e so

lid a

nd li

quid

sta

tes.

Long

er-c

hain

alk

anes

hav

e m

ore

disp

ersi

on fo

rces

.

Page 14: Copyright © 2016, 2013, 2010 Pearson Education, Inc. …ion.chem.usu.edu/~scheiner/LundellChemistry/lecture...Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Mel

ting

and

Boili

ng P

oint

s (2

of 4

)

Bran

ched

alk

anes

•ha

ve lo

wer

boi

ling

poin

ts th

an th

e st

raig

ht-c

hain

isom

ers.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Mel

ting

and

Boili

ng P

oint

s (2

of 4

)

Bran

ched

alk

anes

•ha

ve lo

wer

boi

ling

poin

ts th

an th

e st

raig

ht-c

hain

isom

ers.

•te

nd to

be

mor

e co

mpa

ct, r

educ

ing

the

poin

ts o

f con

tact

be

twee

n th

e m

olec

ules

.

•do

not

hav

e lin

ear s

hape

s an

d ca

nnot

line

up

clos

e to

eac

h ot

her.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Mel

ting

and

Boili

ng P

oint

s (3

of 4

)

Cyc

loal

kane

s

•ha

ve h

ighe

r boi

ling

poin

ts th

an th

e st

raig

ht-c

hain

alk

anes

w

ith th

e sa

me

num

ber o

f car

bon

atom

s.

•ha

ve li

mite

d ro

tatio

n of

car

bon

bond

s; th

ey m

aint

ain

thei

r rig

id s

truct

ure

and

can

be s

tack

ed c

lose

ly to

geth

er, w

hich

gi

ves

them

man

y po

ints

of c

onta

ct a

nd a

ttrac

tions

to e

ach

othe

r.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Mel

ting

and

Boili

ng P

oint

s (4

of 4

)

We

can

com

pare

the

boilin

g po

ints

of s

traig

ht-c

hain

alk

anes

, br

anch

ed-c

hain

alk

anes

, and

cyc

loal

kane

s.Ta

ble

12.6

Com

paris

on o

f Boi

ling

Poin

ts o

f Alk

anes

and

Cyc

loal

kane

s w

ith F

ive

Car

bons

Form

ula

Nam

eB

oilin

g Po

int (

°C)

Stra

ight

-Cha

in A

lkan

eBL

ANK

BLAN

KS

traig

ht c

hain

alk

anes

. co

nden

sed

stru

ctur

al

form

ula,

C

H 3

, C H

2, C

H 2

, C H

2, C

H 3

Pent

ane

36

Bra

nche

d-C

hain

Alk

anes

BLAN

KBL

ANK

Bra

nche

d ch

ain

alka

nes.

con

dens

ed s

truct

ural

for

mul

a,

C H

3, C

H s

ingl

e-bo

nded

to

C H

3, C

H 2

, C H

3

2-M

ethy

lbut

ane

28

Cen

tral

C s

ingl

e-bo

nded

to

four

C H

3 m

olec

ules

Dim

ethy

lpro

pane

10

Cyc

loal

kane

BLAN

KBL

ANK

line-

angl

e st

ruct

ural

fo

rmul

a,

a pe

ntag

onal

ring

Cyc

lope

ntan

e49

Page 15: Copyright © 2016, 2013, 2010 Pearson Education, Inc. …ion.chem.usu.edu/~scheiner/LundellChemistry/lecture...Copyright © 2016, 2013, 2010 Pearson Education, Inc. All Rights Reserved

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Com

bust

ion

of A

lkan

es (1

of 3

)

The

carb

on–c

arbo

n si

ngle

bon

ds in

alk

anes

are

diff

icul

t to

brea

k, w

hich

mak

es th

em th

e le

ast r

eact

ive

fam

ily o

f org

anic

co

mpo

unds

.

How

ever

, alk

anes

bur

n re

adily

in o

xyge

n to

pro

duce

car

bon

diox

ide,

wat

er, a

nd e

nerg

y.

Alka

ne O

2

CO

2

H2O

+ e

nerg

yg

gg

g

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Com

bust

ion

of A

lkan

es (3

of 3

)

Met

hane

is th

e na

tura

l gas

we

use

to c

ook

our f

ood

and

heat

our

hom

es. T

he e

quat

ion

for t

he c

ombu

stio

n of

m

etha

ne (C

H4)

is w

ritte

n as

follo

ws:

42

22

CH

2

O

CO

2

HO

+ e

nerg

yg

gg

g2

Prop

ane

is th

e ga

s us

ed in

por

tabl

e he

ater

s an

d ga

s ba

rbec

ues.

The

equ

atio

n fo

r the

com

bust

ion

of p

ropa

ne

(C3H

8) is

writ

ten

as fo

llow

s:

42

22

CH

5

O

3C

O

4H

O +

ene

rgy

gg

gg

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Solu

bilit

y an

d D

ensit

y of

Alk

anes

Alka

nes

are

•no

npol

ar.

•in

solu

ble

in w

ater

.

•le

ss d

ense

than

wat

er.

•fla

mm

able

in a

ir.

•fo

und

in c

rude

oil.

If th

ere

is a

n oi

l spi

ll in

the

ocea

n, th

e al

kane

s in

the

crud

e oi

l do

not

mix

with

the

wat

er b

ut fl

oat o

n to

p, fo

rmin

g a

thin

la

yer o

n th

e su

rface

.

Cop

yrig

ht ©

201

6, 2

013,

201

0Pe

arso

n Ed

ucat

ion,

Inc

. All

Rig

hts

Res

erve

d

Cha

pter

1212

.1 –

Org

anic

Com

poun

ds

12.2

–Al

kane

s

12.3

–Al

kane

s w

ith S

ubst

ituen

ts

12.4

–Pr

oper

ties

of A

lkan

es

12.5

–Al

kene

san

dAl

kyne

s

12.6

–C

is-T

rans

Isom

ers

12.7

–Ad

ditio

nR

eact

ions

forA

lken

es

12.8

–Ar

omat

ic C

ompo

unds