Question

The product from the reaction of 1- pentene with Cl2 in H2O is named:
a) 1 - chloro -2 – pentanol
b) 2-chloro - 2 - pentanol
c) 1 - chloro - 1-pentanol
d) 2 - chloro - 1 - pentanol

Answer 1

Answer:

1 Chloro 1Pentenol

Option(c)

Notice.I dont know the exact answr,If its wrong pls report.

Answer 2

Option (a) is correct.

(a) 1-chloro-2-pentanol

Explanation:

• The reaction of alkene with halogen in presence of water forms halohydrins.
• In the reaction first Cl2, will undergo bond breaking and chloronium ion will form a cyclic compound with the doyuble bond.
• The the water molecule will attack at the more sustituted site of the cyclic part, and hydroxyl group will get attached to it.
• The last step is the deprotonation and formation of cyclohydrin.
• 1-pentene will form 1-chloro-2-pentanol. Therefore, option (a) is correct.
• The mechanism is shown in the figure: