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Organic Chemistry 1

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Moderate

IR Spectrum of Benzaldehyde

ORGO1-HNV1JQ

An infrared absorption spectrum is taken of benzaldehyde.

Which of the following characteristic bands do you expect to see in that IR spectrum?

Select ALL that apply.

A

Strong, sharp signal at $2300 cm^{-1}$ corresponding to the $C=O$ stretch.

B

Two weak signals at $2850-2700 cm^{-1}$ corresponding to the aldehyde proton $C-H$ stretch.

C

Strong, broad signal at $3500-2800 cm^{-1}$ corresponding to the aldehyde proton $C-H$ stretch.

D

Several signals at $3100-3000 cm^{-1}$ corresponding to the aromatic $C-H$ stretches

E

Strong, sharp signal at $1700 cm^{-1}$ corresponding to the $C=O$ stretch.