If an organic compound shows a streching ( > C=O ) frequency of 1720 ~cm^-1 . The organic compound is ____.

Correct answer: (A) An aliphatic aldehyde. An aliphatic aldehyde. Generally H-C=O streching frequency is about 2830-2695 ~cm^-1 but for aliphatic aldehyde is 1740-1720 ~cm^-1 .

Q25 / 110 · VITEEE 2022 · Chemistry

If an organic compound shows a streching (\(> \mathrm{C}=\mathrm{O}\)) frequency of \(1720 \mathrm{~cm}^{-1}\). The organic compound is ____.

Correct answer
A
An aliphatic aldehyde
B
An \(\alpha, \beta\) unsaturated aldehyde
C
A phenolic aldehyde
D
An aromatic aldehyde

Solution

An aliphatic aldehyde. Generally \(\mathrm{H}-\mathrm{C}=\mathrm{O}\) streching frequency is about \(2830-2695 \mathrm{~cm}^{-1}\) but for aliphatic aldehyde is \(1740-1720 \mathrm{~cm}^{-1}\).

Hence, the correct answer is option: 'A'.

If an organic compound shows a streching (\(> \mathrm{C}=\mathrm{O}\)) frequency of \(1720 \mathrm{~cm}^{-1}\). The organic compound is ____.

Solution

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