Question

Rank the alkyl halides in order of increasing SN₂ reactivity.

Answer 1

The SN2 reactivity of alkyl halides depends on the structure and reactivity of the alkyl group and the halogen atom. Primary alkyl halides are generally more reactive than secondary alkyl halides.

Step-by-step explanation:

The SN2 reactivity of alkyl halides can be ranked based on the structure and reactivity of the alkyl group and the halogen atom. Generally, primary alkyl halides are more reactive than secondary alkyl halides, and secondary alkyl halides are more reactive than tertiary alkyl halides. This is because in SN2 reactions, a strong nucleophile attacks the alkyl group and the leaving group, and the reactivity depends on the steric hindrance and stability of the transition state.

For example, let's consider the following alkyl halides:

1. CH3Cl (methyl chloride)
2. CH3CH2Cl (ethyl chloride)
3. CH3CH2CH2Cl (propyl chloride)

In this case, the alkyl halides can be ranked in increasing SN2 reactivity as follows:

1. CH3CH2CH2Cl > CH3CH2Cl > CH3Cl