Question

Q2. Complete the following reactions. (5 Marks) i) H n-Butli BF3, E10 ii) ii) (n-But), Cu-Li CH3-CH-1 Mg-Br iv) H30 a Culi 2. H30

Answer 1

Explanation:

Reaction 1). Nucleophilic substitution to carbonyl where isopropyl carbanion act as a nucleophile and attacks on the acyl chloride which ultimately leads to loss of chloride and ketone is obtained as a product.

Reaction 2). Here lewis acid BF3 act as a catalyst for the ring opening by nucleophilic attack of n-BuLi to form an alcohol named octanol.

Reaction 3). This reaction is an example of nucleophilic substitution reaction. Here reaction is between alkyl iodide and a Gilman reagent to form hexane.

Reaction 4). This reaction is an example of direct addition of grignard reagent to an unsaturated carbonyl to yield unsaturated alcohol as a product.

Reaction 5). This reaction is an example of conjugate addition or Michael addition to an unsaturated carbonyl which gives ketone as a product.