Question

in dibenzalacetone synthesis experiment the reaction stopped before the dehydration step, how you can confirm this using FTIR. Use wavenumbers in your answer.

hints:

1- the presence of the benzene ring and/or electronegative atoms can lower the frequencies in the FTIR spectrum of carbonyl group.

2- the carbonyl group of dibenzealacetone is highly conjugated with the double bonds and both benzene rings.

3- carbonyl group absorption shift.

Answer 1