Haloalkane Reactions

Question 1

Haloalkane —> Alcohol. Name the reagents and type of reaction.

Answer 1

KOH(aq). This is a substitution reaction as hydroxyl group is replacing the halogen group.

Question 2

Haloalkane —> Alkene. Name the reagents and type of reaction. What are the excess products?

Answer 2

KOH(alc). This is a dehydrohalogenation reaction because the alcoholic KOH removes a hydrogen halogen group (eg. HBr). The result is Alkene + KX + H2)

Question 3

Alkane —> Haloalkane. Name the reagents, speed and name of process.

Answer 3

Hydrogen halide (HX) or halogen (Br2, F2, I2, Cl2). Requires UV light. This is a slow substitution reaction.

Question 4

Alcohol —> Haloalkane. Name the reagents and type of reaction.

Answer 4

PCl3 / PCl5 / SOCl2. This is a substitution reaction.

Question 5

Alkene —> Haloalkane. Name the reagents and type of reaction. Name the process.

Answer 5

Halogen (Br2, I2, Cl2). This is an addition reaction. This is halogenation.