The infrared spectroscopic analysis of a symmetrical compound with the molecular

Question

The infrared spectroscopic analysis of a symmetrical compound with the molecular formula of C_4H_6O, shows absorption hands at 3080, 1620, and 700 cm^-1. There are no bands in the 3400 cm^-1 region. Give the structure of the compound. The product from your resolution of 1-phenylethanamine could have been analyzed using gas chromatography with a chiral column. Assuming the peaks at 11.1 min and 12.2 min are (R)-(+)-1-phenylethanamine and (S)-(-)-1-phenylethanamine, respectively, answer the questions below.

Explanation / Answer

no bands at 3400 cm-1 indicates absence of -OH alcohol functional group

IR bands                    functional group

3080 cm-1                           =C-H sp2

1620 cm-1                         C=C

700 cm-1                             vinyl C-H (cis-disubstituted alkene )

CH3-HC=CH-CHO

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