Explain why a carbonyl absorption shifts to lower frequency in an oc,p-unsaturated carbonyl compound—a compound having a carbonyl group bonded directly to a carbon-carbon double bond. For example, the carbonyl absorption occurs at 1720 cm-1 for cyclohexanone, and at 1685 cm-1 for cyclohex-2-enone.

Explain why a carbonyl absorption shifts to lower frequency in an oc,p-unsaturated carbonyl compound—a compound having a carbonyl group bonded directly to a carbon-carbon double bond. For example, the carbonyl absorption occurs at 1720 cm-1 for cyclohexanone, and at 1685 cm-1 for cyclohex-2-enone.

cyclohexanone cyclohex-2-enone