Question

If (E)-3-heptene ((E)-hept-3-ene) were dissolved in ether and treated with HCl, which of the following describes the product(s) of the reaction?

a) Addition of HCl across the double bond
b) Substitution of HCl for a hydrogen atom
c) Formation of a cyclic compound
d) No reaction occurs

Answer 1

When (E)-3-heptene is treated with HCl, an addition of HCl across the double bond occurs, resulting in the formation of a monosubstituted alkyl halide.

Step-by-step explanation:

When (E)-3-heptene is dissolved in ether and treated with HCl, the reaction that occurs is addition of HCl across the double bond. HCl adds to the alkene, with the H atom attaching to one carbon and the Cl atom attaching to the other carbon involved in the double bond. This is a typical example of an electrophilic addition reaction, where the pi bond electrons in the alkene act as a nucleophile and attack the H+ ion of the HCl, leading to the formation of a carbocation intermediate that subsequently reacts with the Cl- ion. This results in the formation of a monosubstituted alkyl halide.

The correct answer to what describes the product(s) of the reaction is therefore a) Addition of HCl across the double bond.