Which of the following functional groups contains a $C_1=O$ (carbonyl group) directly bonded to a $N$ atom?

• A. Ether
• B. $\mathrm{Amide}(R-C=O-N-\mathrm{R\text{'}})$
• C. Alkene
• D. Alcohol

Answer: (B)

Verified step by step guidance

1. Identify the carbonyl group, which is characterized by a carbon atom double bonded to an oxygen atom, represented as \(\mathrm{C=O}\).
2. Examine each functional group option to see if the carbonyl carbon (\(\mathrm{C=O}\)) is directly bonded to a nitrogen atom (\(\mathrm{N}\)).
3. Recall that an ether has an oxygen atom bonded to two alkyl or aryl groups, but no carbonyl group, so it does not meet the criteria.
4. Recognize that an alkene contains a carbon-carbon double bond (\(\mathrm{C=C}\)) but no carbonyl group or nitrogen directly attached to a carbonyl carbon.
5. Understand that an amide has the structure \(\mathrm{R-C(=O)-N-R'}\), where the carbonyl carbon is directly bonded to a nitrogen atom, fulfilling the condition given in the problem.