dept spectra cosy spectra hetcor spectra. dept-90, dept-135 distortionless enhancement by...
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![Page 1: DEPT Spectra COSY Spectra HETCOR Spectra. DEPT-90, DEPT-135 Distortionless Enhancement by Polarization Transfer Preferred procedure for determining #](https://reader035.vdocuments.mx/reader035/viewer/2022062720/56649f175503460f94c2da96/html5/thumbnails/1.jpg)
DEPT SpectraCOSY Spectra
HETCOR Spectra
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DEPT-90, DEPT-135Distortionless Enhancement by Polarization
Transfer• Preferred procedure for determining # protons
attached to carbons• Variable proton pulse angle is set at 90o and
135o
• In DEPT-90, only CH shows. In DEPT-135, CH2’s are phased down, CH and CH3 are phased up
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Adjustment of 1H pulse angle
Avoids overlapping multiplets CH
CH2
CH3
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2-Heptanone, CPD and DEPT-35
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6-Methyl-5-hepten-2-olStandard CPD Spectrum
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DEPT-90DEPT-135
OH
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O
CH3
DEPT-135
DEPT-90
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<>
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Limonene
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Ipsenol CPD, DEPT-135, DEPT 90
76
25 3
4 19
8,10
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CO2CH3
CH3CO
O
135
90
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Correlated Spectroscopy
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FT of the t1 domain, acetone
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O c t o b e r 2 0 , 2 0 0 4 J o a n n a R . L o n g 1 5
2 D E x c h a n g e N M R
A . S . E d i s o nU n i v e r s i t y o f F l o r i d a
t 1 t 2
F T o f t 2 FT in t1 w
ill give 2D frequency spectrum
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October 20, 2004 Joanna R. Long 16
15 l N•Ndimethylacetamide in 700 l d-chloroform at 29° C
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A-B coupling in COSY Spectrum
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CH3CH2CCH3
O
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CH2CH3
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Isobutyl Alcohol
OH
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O
O
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1H NMR Spectrum of Ipsenol
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COSY Spectra of Ipsenol
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HO
1
23
4
5 6 7
8
9
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HETCOR Spctrum of Ipsenol
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N
COCH2CH3
O
H
H
H
H
Exercise 5.6, p. 291
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N
COCH2CH3
O
H
H
H
H
Exercise 5.6, p. 292
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O
CH3