Advices For Studying Organic Chemistry

2.16C COUPLED INTERACTIONS:

1. CO 2 : symmetrical 1340 cm–1 asymmetrical 2350 cm–1 normal 1715 cm–1


2. 
   

   Symmetric Stretch Asymmetric Stretch

   
   

Methyl CH

H

H

~ 2872 cm–1

CH

H

H

~ 2962 cm–1

Anhydride C O C

OO

~ 1760 cm–1

C

O

C

OO

~ 1800 cm–1

Amine N

H

H

~ 3300 cm–1

C

H

H

~3400 cm–1

Nitro N

O

O

~ 1350 cm–1

N

O

O

~ 1550 cm–1

Asymmetric stretching vibrations occur at higher frequency than symmetric ones.

3.

HCH 2 OH

H 3 CCH 2 OH: 1053 cm−^1

: νCO

νCO

1034 cm−^1 ν

CCO