For alkyl halides used in SN1 and SN2 mechanisms, rank the leaving groups in order of r eaction rate. For alkyl halides…
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Question “For alkyl halides used in SN1 and SN2 mechanisms, rank the leaving groups in order of r eaction rate. For alkyl halides…”
For alkyl halides used in SN1 and SN2 mechanisms, rank the
leaving groups in order of r
eaction rate.
For alkyl halides used in SN1 and SN2 mechanisms, rank the leaving groups in order of reaction rate. Iodide Chloride Bromide Fluoride
Answer
Concepts and Reason
S N1 or S N2 are nucleophilic substitution reactions. The numbers 1 and 2, respectively, indicate unimolecular or bimolecular reactions. The nature of the leaving group influences the rate of reaction. If the substrate has a good leaving group, both S 1 as well as S 2 mechanisms are high.
Fundamentals
Alkyl halides have the halide Ion replaced by the incoming nucleophile. This is true in both the S 1 (and S 2) mechanisms. The leaving group in this case is the halide ion.
The S N1 react is a two-step process. The substrate concentration is the only determinant of the rate of the reaction. It doesn’t depend on the amount of nucleophile that is incoming.
The single-step reaction of S N 2 is called the S N 2 Reaction. The rate of reaction in InS N2 depends on the substrate concentration.
This is the order of basicity for the halide Ions:
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