SN1 and SN2

(a) Explain how the sterochemistry of SN^1 and SN^2 differs. (b) Explain the formation of 60 % inverted and 40 % racemic product from a typical SN^1 reaction. (c) Account for the following in terms of the rate of solvent in the above problem. (i) The reaction is first order. (ii) Under what conditions the rate expression is more than first order ? (iii) What is the order and molecularity ?

Chemical Properties- SN^1 And SN^2 Mechanism |Chemical Properties-Elimination Reaction |Chemical Properties-Reaction With Cyanide |Chemical Properties Of Haloalkanes |OMR

Nucleophilic substitution reactions are of two types, substitution nucleophllic bimolecular (SN^2) and substitution nucleophilic unimolecular (SN^1) depending on molecules taking part in determining the rate of reaction. Reactivity of alkyl halide towards SN^1 and SN^2 reactions depends on various factors such as steric hindrance, stability of intermediate or transition state and polarity of solvent. SN^2 reaction mechanism is favoured mostly by primary alkyl halide then secondary and then tertiary. This order is reversed in case of SN^1 reactions. SN^1 reaction is fastest in