spectroscopy of aldehydes and ketones n.
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Spectroscopy of Aldehydes and Ketones. IR Spectrum of Acetone. C=O. IR Spectrum of Acetophenone. C=O. IR Spectrum of Acetaldehyde. Ald. C-H. C=O. IR Spectrum of p-Tolualdehyde. Ald. C-H. Ald. C-H. C=O. C=O. Summary of Spectral Features.

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ir spectrum of p tolualdehyde
IR Spectrum of p-Tolualdehyde

Ald. C-H

Ald. C-H

C=O

C=O

summary of spectral features
Summary of Spectral Features

IR: 1710-1730 cm-1 (C=O stretching frequency)

(lower by ~ 20 to 30 cm-1 if C=O is conjugated)

aldehydes only: C-H stretch: 2820 & 2720 cm-1

13C-NMR: both aldehydes and ketones have a characteristic C=O peak at 190-215 d.

1H-NMR: aldehydes only: ald. C-H absorbs at 10 d.

both aldehydes and ketones have Hs a to C=O at 2.2-2.5 d.