OChem Study Set: Mass Spec & NMR for Chapters 14-15

IR signal at OH

3200-3600 (broad)

IR Signal for carboxylic acid (the H bond)

2200-3600 (very broad)

IR signal for amine (N-H)

3350-3500

IR signal for CSP - H

~3300

IR signal for CSP2 - H

3000-3100

IR signal for CSP3 - H

2850-3000

IR signal for Aldehyde ( H bond)

2750 and 2850 (both weak)

IR signal for C=O

~ 1650-1820 (strong)

IR signal for C=C

1600-1700

IR signal for aromatic ring

1450-1600 and 1650-2000

IR signal for anhydride

1820 and 1760

IR signal for a triple bond for a carbon carbon bond

2100-2200

IR signal for a triple bond for a carbon and nitrogen bond

2200-2300

What is the mass spec pattern for the fragmentation of alcohol

A alpha cleavage (where the alpha and beta bonds cleave),and dehydration (M-18)

What is the mass spec pattern for the fragmentation of Amines

Alpha Cleavage

What is the mass spec pattern for the fragmentation of ketone and aldehydes

Mclafferty rearrangement where there needs to be a hydrogen at gamma, the alpha and beta carbons split and the signal that comes up is positive.

What is the NMR for methyl

.9

What is the NMR for methylene

1.2

What is the NMR for methine

1.7

What is the NMR for CH3I

2.2

What is the NMR for CH3Br

2.7

What is the NMR for CH3Cl

3.1

What is the NMr for CH3F

4.3

What is the NMR for allylic

~2

What is the NMR for Alkyl, triple bond with hydrogen attached

~2.5

What is the NMR for alky halide

2-4

What is the NMR for Alcohol

2-5

What is the NMR for Vinylic

4.5-6.5

What is the NMR for aryl

6.5-8

What is the NMR for aldehyde

~10

What is the NMR for carboxylic acid

~12

What is the NMR for R-CH3 (C13)

10-30

What is the NMR for CH2R2

15-55

What is the NMR for CHR3

20-60

What is the NMR for C-I

0-40

What is the NMR for C-Br

25-65

What is the NMR for C-N

40-60

What is the NMR for C-Cl

35-80

What is the NMR for C-O

40-80

What is the NMR for Alkynes

65-90

What is the NMR for C=C

100-150

What is the NMR for aromatic rings (carbon)

110-170

What is the NMR for Carboxylic acid (carbon)

165-180

What is the NMR for C=O

185-220