PolymershardMCQ SINGLE

Neoprene (polychloroprene) is a versatile synthetic rubber. In its industrial preparation, the monomPolymers Chemistry Question

Question

Neoprene (polychloroprene) is a versatile synthetic rubber. In its industrial preparation, the monomer chloroprene (2-chloro-1,3-butadiene) is ultimately derived from which simple starting material via a dimer intermediate?

Answer: B

💡 Solution & Explanation

Chloroprene is manufactured from acetylene. Two molecules of acetylene dimerize in the presence of $Cu_2Cl_2/NH_4Cl$ to form vinyl acetylene ($CH_2=CH-C \equiv CH$). Vinyl acetylene then undergoes hydrochlorination (adds $HCl$) to form chloroprene.

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