Slide 1

What is the correct shape of CO 2 ? #1: What are bonds made of? #2: What charge are electrons?

Slide 2

What is the correct shape of CO 2 ? Will those (-) charges attract or repel? A)AttractB) Repel (Clue: look at 2 balloons)

Slide 3

Key Pt 1: Bonding Groups Single bonds = 1 bonding group Double bonds = Triple bonds Question: Example: CCl 4 - Bonding Groups = 4

Slide 4

Key Pt 1: Bonding Groups Single bonds = 1 bonding group Double bonds = Triple bonds 1 bonding group Question: Example: CHOF - Bonding Groups= 3

Slide 5

Key Pt 1: Bonding Groups Single bonds = 1 bonding group Double bonds = Triple bonds 1 bonding group Question: Example: CHOF - Bonding Groups= 2 1 bonding group

Slide 6

Key Pt 1: Bonding Groups Single lone pair= 1 nonbonding group Two lone pairs= Three lone pairs = Question: Example: AsH 3 -Nonbonding Groups= 1

Slide 7

Key Pt 2: Nonbonding Groups Single lone pair= 1 nonbonding group Two lone pairs= Three lone pairs = Question: Example: SHCl -Nonbonding Groups= 2 nonbonding group 3 nonbonding group 2

Slide 8

Key Pt 2: Nonbonding Groups Single lone pair= 1 nonbonding group Two lone pairs= Three lone pairs = Question: Example: SHCl -Nonbonding Groups= 2 nonbonding group 3 nonbonding group 2

Slide 9

Key Pt 2: Nonbonding Groups Single lone pair= 1 nonbonding group Two lone pairs= Three lone pairs = Question: Example: SHCl -Nonbonding Groups= 2 nonbonding group 3 nonbonding group 0

Slide 10

How many bonding groups are there? A) 3C) 8 B) 4 (Double Bonds =Just one bonding group)

Slide 11

How many nonbonding groups are there? A) 0C) 5 B) 3 (Nonbonding:Only count around central atom)

Slide 12

How many nonbonding groups are there? A) 0C) 5 B) 3 (Nonbonding:Only count around central atom) 2 3 0

Slide 13

Cut and paste into your notebooks. Question:

Slide 14

alencehelllectronairepulsion spread out as much as possible. A)AttractB) Repel

Slide 15

alencehelllectronairepulsion spread out as much as possible. Step 1: Molecule Count # Electron Groups around central atom Step 2: Balloon Spread out as far as possible. Angle? Step 3: Geometry Determine the shape. 2 bonding groups 180 Linear A)Linear B)Trigonal Planar C)Trigonal Pyramid D)Tetrahedral

Slide 16

VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups stay as far apart as possible. Electron Groups 2 Bonding Groups Linear 2 Shape:

Slide 17

alencehelllectronairepulsion spread out as much as possible. Step 1: Molecule Count # Electron Groups around central atom Step 2: Balloon Spread out as far as possible. Angle? Step 3: Geometry Determine the shape. 3 bonding groups Trigonal Planar A)Linear B)Trigonal Planar C)Tetrahedral 120

Slide 18

VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups stay as far apart as possible. Electron Groups 2 Bonding Groups Linear 2 Shape: 3 Bonding Groups Trigonal Planar 3

Slide 19

How will these groups spread out? A) B) C) None of the above (How many electron groups?4 electron groups) (Balloon demo: what happens?)

Slide 20

What shape is this most like? (How many corners? A) Triangular PyramidB) Rectangular Pyramid 4 corners)

Slide 21

What else is this shape called? A) TrihedronC) Tetrahedron B) Quadrahedron (Mono = 1, Di = 2, Tri = 3, Tetra = 4, Penta = 5)

Slide 22

alencehelllectronairepulsion spread out as much as possible. Step 1: Molecule Count # Electron Groups around central atom Step 2: Balloon Spread out as far as possible. Angle? Step 3: Geometry Determine the shape. 4 bonding groups Tetrahe- dral A)Linear B)Trigonal Planar C)Tetrahedral 109.5

Slide 23

VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups stay as far apart as possible. Electron Groups 2 Bonding Groups Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding Groups Tetrahe- dral

Slide 24

What kind of shape will form? A) Trigonal PlanarC)Tetrahedral B) Trigonal Pyramidal (Bonding groups =3)

Slide 25

VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups stay as far apart as possible. Electron Groups 2 Bonding Groups Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding Groups Tetrahe- dral

Slide 26

What kind of shape will form? A) Trigonal PlanarC)Tetrahedral B) Trigonal Pyramidal (Bonding groups =3)

Slide 27

What kind of shape will form? A) Trigonal PlanarC)Tetrahedral B) Trigonal Pyramidal (Bonding groups =2)

Slide 28

VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups stay as far apart as possible. Electron Groups 2 Bonding Groups Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding Groups Tetrahe- dral

Slide 29

What kind of shape will form? A) TetrahedralC) Linear B) Straight (Bonding groups =3)

Slide 30

alencehelllectronairepulsion spread out as much as possible. Step 1: Molecule Count # Electron Groups around central atom Step 2: Balloon Spread out as far as possible. Angle? Step 3: Geometry Determine the shape. 3 bonding, 1 nonbonding Trigonal Pyramidal 109.5

Slide 31

VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups stay as far apart as possible. Electron Groups 2 Bonding Groups Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding Groups Tetrahe- dral 3 bonding 1 nonbonding Trigonal Pyramidal

Slide 32

What will the overall shape of SF 2 be? A) LinearB) Tetrahedral (Count around central atom only)

Slide 33

How many corners will SF 2 have? A) 2 cornersC) 4 corners B) 3 corners (1 atom = 1 corner)

Slide 34

Remove one more dot from candy tetrahedron. What letter does it look like now? V-shaped

Slide 35

alencehelllectronairepulsion spread out as much as possible. Step 1: Molecule Count # Electron Groups around central atom Step 2: Balloon Spread out as far as possible. Angle? Step 3: Geometry Determine the shape. 2 bonding, 2 nonbonding Bent 109.5

Slide 36

VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups stay as far apart as possible. Electron Groups 2 Bonding Groups Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding Groups Tetrahe- dral 3 bonding 1 nonbonding Trigonal Pyramidal 2 bonding 2 nonbonding Bent

Slide 37

What is the shape of PCl 3 ? A) Trigonal PlanarC) Tetrahedral B) Trigonal Pyramidal (# Bonding = # Nonbonding = ) 3 1

Slide 38

VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups stay as far apart as possible. Electron Groups 2 Bonding Groups Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding Groups Tetrahe- dral 3 bonding 1 nonbonding Trigonal Pyramidal 2 bonding 2 nonbonding Bent

Slide 39

What is the shape of PCl 3 ? A) Trigonal PlanarC) Tetrahedral B) Trigonal Pyramidal (# Bonding = # Nonbonding = ) 3 1

Slide 40

What is the shape of SCl 2 ? A) LinearC) Bent B) Tetrahedral (# Bonding = # Nonbonding = ) 2 2

Slide 41

VSEPR: Valence Shell Electron Pair Repulsion. Electron Groups stay as far apart as possible. Electron Groups 2 Bonding Groups Linear 2 Shape: 3 Bonding Groups Trigonal Planar 34 4 Bonding Groups Tetrahe- dral 3 bonding 1 nonbonding Trigonal Pyramidal 2 bonding 2 nonbonding Bent

Slide 42

What is the shape of PCl 3 ? A) LinearC) Bent B) Tetrahedral (# Bonding = # Nonbonding = ) 2 2