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)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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