Q102 · CSIR NET Chemistry, December 2019
Paper: CSIR NET December 2019 · Subject: Organic Chemistry · Chapter: Organic Spectroscopy · Topic: IR · Marks: 2 · Difficulty: Hard
The correct order of carbonyl stretching frequency of the given compounds is 
A 
B 
C
A B C(a)A $>$ B $>$ C
(b)B $>$ C $>$ A
(c)$\mathrm{C}>\mathrm{A}>\mathrm{B}$
(d)B $>$ A $>$ C
Answer
Answer: D ✓ checked by 4AB · confidence high
Explanation
ν(C=O): dimethylketene (~2150) > cyclopropanone (~1815, strain) > acetone (1715). B > A > C (d).
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