The bromide shown is heated with $AgCN$ in ethanol. Which structure is the main product?

AStructure A
BStructure B
CStructure C
DStructure D

Answer: B

AgCN is covalent, so the carbon end is tied up with silver and the lone pair on nitrogen attacks the carbon: the product is an isocyanide, 2-isocyanopropane (isopropyl isocyanide). The nitrile is the KCN product; the amine and propene are not formed.

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The bromide shown is heated with AgCN in ethanol. Which structure is the main product?

Answer: B

More questions on KCN vs AgCN, KNO2 vs AgNO2, Finkelstein and Swarts on drawn halides

The bromide shown is heated with $AgCN$ in ethanol. Which structure is the main product?