Statement 1 : On moving 1° to 3° alkyl halide rate of E2increases while rate of SN2 decreasesStatement 2 : E2reaction give element effect respect to halogen.a)Statement-1 is true, statement-2 is true and statement -2 is correct explanation for statement-1.b)Statement-1 is true, statement-2 is true and statement-2 NOT the correct explanation for statment-1c)Statement :1 is true, statement-2 is false.d)Statement : 1 is false, statement -2 is trueCorrect answer is option 'B'. Can you explain this answer?

Question

Statement 1 : On moving 1&#176; to 3&#176; alkyl halide rate of E2increases while rate of SN2 decreasesStatement 2 : E2reaction give element effect respect to halogen.a)Statement-1 is true, statement-2 is true and statement -2 is correct explanation for statement-1.b)Statement-1 is true, statement-2 is true and statement-2 NOT the correct explanation for statment-1c)Statement :1 is true, statement-2 is false.d)Statement : 1 is false, statement -2 is trueCorrect answer is option 'B'. Can you explain this answer?

Answer

Explanation:

Statement 1: On moving 1 to 3 alkyl halide rate of E2 increases while rate of SN2 decreases.

Statement 2: E2 reaction gives element effect respect to halogen.

Explanation:

E2 Reaction: The E2 reaction is a second-order elimination reaction where the rate of reaction is dependent on the concentration of the substrate and the alkyl halide. The E2 reaction generally occurs in a one-step mechanism where the substrate and the base are involved in the reaction.

SN2 Reaction: The SN2 reaction is a second-order nucleophilic substitution reaction where the rate of reaction is dependent on the concentration of the substrate and the nucleophile. The SN2 reaction generally occurs in a one-step mechanism where the nucleophile attacks the substrate and the leaving group leaves the molecule.

Explanation of Statement 1:

On moving 1 to 3 alkyl halide, the rate of E2 reaction increases while the rate of SN2 reaction decreases. This is because the E2 reaction is favored by the presence of bulky groups on the substrate and the base, and the SN2 reaction is favored by the presence of smaller groups. As we move from 1 to 3 alkyl halide, the size of the alkyl groups increases, making it more difficult for the nucleophile to attack the substrate and form a stable intermediate. Therefore, the rate of SN2 reaction decreases. On the other hand, the size of the alkyl groups also makes it easier for the base to remove the leaving group and form a stable intermediate, therefore, the rate of E2 reaction increases.

Explanation of Statement 2:

The E2 reaction gives element effect respect to halogen. The element effect refers to the effect of the halogen on the rate of reaction. In general, the rate of E2 reaction increases as we move from fluorine to iodine. This is because the size of the halogen increases, making it easier for the base to remove the leaving group and form a stable intermediate. Therefore, the rate of E2 reaction increases.

Conclusion:

Therefore, both statement 1 and statement 2 are true, but statement 2 is not the correct explanation for statement 1. The correct explanation for statement 1 is the size of the alkyl groups, which affects the rate of E2 and SN2 reactions.

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