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The compound from the following list that exhibits the Infrared spectrum below is (Use your cursor to read the IR frequescy s
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Answer #1

Soln:

Option C i.e. Butanal is the correct option.

Actually the peak at ~ 1750 cm-1 corresponds to C=O peak. Now there are two compunds that contain that group. In case of, option B acetic acid, compound must have some broad peak ~ 3400 cm-1 due to O-H stretching but it is absent in given spectrum. In fact, the given spectrum contains some C-H (aldehyde) stretching at ~ 2850 cm-1which confirms that the given spectrum is justified for option C.

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