(a)
Interpretation:
To rank the given organic halides in order of increasing SN1 reactivity.
Concept introduction:
SN1 reaction is a unimolecular nucleophilic substitution reaction. It is a first-order kinetics and a two-step mechanism in which bond breaking occurs before bond making. The mechanism has two steps. Carbocations are formed as reactive intermediates. The Heterolysis of the C - Br bond forms an intermediate carbocation. This is the rate-determining step because it involves only bond cleavage. The nucleophilic attack the carbocation forms the new bond in the product.
(b)
Interpretation:
To rank the given organic halides in order of increasing SN1 reactivity.
Concept introduction:
SN1 reaction is a unimolecular nucleophilic substitution reaction. It is a first-order kinetics and a two-step mechanism in which bond breaking occurs before bond making. The mechanism has two steps. Carbocations are formed as reactive intermediates. The Heterolysis of the C - Br bond forms an intermediate carbocation. This is the rate-determining step because it involves only bond cleavage. The nucleophilic attack the carbocation forms the new bond in the product.
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