________ is produced when 1 equivalent of HBr is added to 1-hexyne in the presence of peroxides.
A)2-bromo-1-hexene
B)E-1-bromo-1-hexene
C)Z-1-bromo-1-hexene
D)a mixture of E and Z isomers of 1-bromo-1-hexene
E)E-2-bromo-2-hexene

Question

Quizplus · Accepted Answer

The addition of HBr to an alkyne in the presence of peroxides follows an anti-Markovnikov addition mechanism that leads to the formation of the less substituted alkene regioisomer(s). In this case, 1-hexyne will produce 1-bromo-1-hexene, which can exist as E and Z isomers due to restricted rotation around the C=C bond. Therefore, the correct answer is D, a mixture of E and Z isomers of 1-bromo-1-hexene.

________ Is Produced When 1 Equivalent of HBr Is Added