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Which Molecular Vibration Does Not Have an Absorption in the IR

Question 12

Multiple Choice

Which molecular vibration does not have an absorption in the IR spectrum?


A) O=C=O symmetrical stretch
B) O=C=O unsymmetrical stretch
C) the carbonyl stretch in acetone, CH3C(=O) CH3
D) the alkene stretch in CH2=C(CH3) 2

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