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1. Enones show one more peak than carbonyl compounds using normal UV-Vis Spectroscopy. Explain.

1. Enones show one more peak than carbonyl compounds using normal UV-Vis Spectroscopy. Explain.
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Answer #1

Carbonyl compounds show a *  and *  transition. However, the latter are forbidden and hence of low intensity.

Since an enone consists of a conjugated system of an alkene and a ketone, this conjugation of a double bond with a carbonyl group leads to intense absorption corresponding to * and thus the dual peaks.

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