Question

The correct kinetic rate equation for the additionelimination
mechanism of nucleophilic aromatic
substitution
(a) rate = K [aryl halide] [nucleophile]
(b) rate = K [aryl halide]
(c) rate = K [aryl halide] [nucleophile]²
(d) rate = K [ nucleophile]

Answer 1

The correct kinetic rate equation for the additionelimination

mechanism of nucleophilic aromatic

substitution

(a) rate = K [aryl halide] [nucleophile]

(b) rate = K [aryl halide]

(c) rate = K [aryl halide] [nucleophile]²

(d) rate = K [ nucleophile]

Answer 2

rate = K [aryl halide] [nucleophile] is the correct option.

Explanation:

• A rate constant of a reaction depends on the rate limiting step of the reaction.

• The rate constant of the reaction is dependent on the concentration of the reagents that take place in the reaction in the rate limiting step.

• Now the nucleophilic substitution of the aryl halides are SN2 reactions.

• So both the concentration of the nucleophile and the reactant.

• So its rate = K [aryl halide] [nucleophile].

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