When a Carbonyl Is Part of a Conjugated π-Network, the C-O

question 43

Multiple Choice

When a carbonyl is part of a conjugated π-network, the C-O stretch:

• A) has a higher frequency than in a nonconjugated system.
• B) has a lower frequency than in a nonconjugated system.
• C) always occurs at 1710 cm^-1.
• D) occurs around 2700 cm^-1.
• E) cannot be distinguished from the C-O stretch in a nonconjugated system.

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