Problem: The vibration of which bond gives an IR absorption that distinguishes between the following two compounds? CH3CH2CH2OH CH3CH2OCH3a)  C—Ob) O—Hc) C—Cd) C—HWhat is the approximate wavenumber (cm-1) of that band?  a) 1050 b) 1250 c) 1450 d) 1700 e) 3500

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We are asked which bond gives an IR absorption that distinguishes between the following two compounds and the approximate wavenumber (cm-1) of that band.


CH3CH2CH2OH 

CH3CH2OCH3


The absorption frequencies in the functional group region:


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Problem Details

The vibration of which bond gives an IR absorption that distinguishes between the following two compounds? 

CH3CH2CH2OH 

CH3CH2OCH3

a)  C—O

b) O—H

c) C—C

d) C—H

What is the approximate wavenumber (cm-1) of that band?  

a) 1050 

b) 1250 

c) 1450 

d) 1700 

e) 3500

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