Imine formation from benzaldehyde and aniline yields an imine functional group with which linkage?

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Multiple Choice

Imine formation from benzaldehyde and aniline yields an imine functional group with which linkage?

Imine formation from an aldehyde and a primary amine produces a Schiff base, characterized by a C=N double bond. In this case the carbonyl carbon from benzaldehyde becomes the imine carbon, while the nitrogen carries the aryl group from the amine (aniline). The resulting structure is Ar–CH=N–Ar', a C=N–Ar linkage where the nitrogen is bonded to the aryl group from aniline. This is the telltale sign of an imine formed by condensation of an aldehyde with a primary amine, with no carbonyl remaining. Enamines would show a C=C–N arrangement, amides still have a C=O, and ketones retain the carbonyl; none of those match the imine formed here.

Imine formation from an aldehyde and a primary amine produces a Schiff base, characterized by a C=N double bond. In this case the carbonyl carbon from benzaldehyde becomes the imine carbon, while the nitrogen carries the aryl group from the amine (aniline). The resulting structure is Ar–CH=N–Ar', a C=N–Ar linkage where the nitrogen is bonded to the aryl group from aniline. This is the telltale sign of an imine formed by condensation of an aldehyde with a primary amine, with no carbonyl remaining. Enamines would show a C=C–N arrangement, amides still have a C=O, and ketones retain the carbonyl; none of those match the imine formed here.

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