Question

23 multiple choice 2 points what is the typical final product of an addition reaction involving an alkene? a ketone, due to rearrangement of the carbon skeleton. an alkane, due to the addition of atoms across the double bond. an alkyne, due to the formation of additional pi bonds. a radical, due to incomplete reaction. previous

Explanation:

Alkenes have double bonds. In addition reactions (e.g., hydrogenation \(C_{n}H_{2n}+H_{2}\xrightarrow{Ni}C_{n}H_{2n + 2}\)), atoms (like \(H\) in hydrogenation) add across the double bond. This saturates the carbon - carbon bond, converting the alkene (\(C_{n}H_{2n}\)) to an alkane (\(C_{n}H_{2n+2}\)). A ketone formation would involve oxidation (not typical addition for alkenes). Alkynes have triple bonds (formed by elimination, not addition to alkenes). Radicals are reactive intermediates (not typical final products of alkene addition reactions).

Answer:

B. An alkane, due to the addition of atoms across the double bond.