Question

How would you distinguish between the IR spectrums of Benzil, Bibenzyl, and Biphenyl? Identidy what major...

How would you distinguish between the IR spectrums of Benzil, Bibenzyl, and Biphenyl? Identidy what major peaks would be present and what functional groups they would correspond to.

Homework Answers

Answer #1

Benzil: IR spectrum of benzil shows characteristic peaks at 3010 cm^-1 due to aromatic C-H stretching and peak at 1640 cm^-1 due to C=C stretch and an intense peak at 1700 cm^-1 due to C=O stretch

Bibenzyl: IR spectrum of bibenzyl shows characteristic peaks at 3010 cm^-1 due to aromatic C-H stretching and peak at 1640 cm^-1 due to C=C stretch and CH2 stretches at 2925 and 2855 cm^-1

Biphenyl: IR spectrum of benzil shows characteristic peaks only at 3010 cm^-1 due to aromatic C-H stretching and peak at 1640 cm^-1 due to C=C stretch

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