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The π framework of p orbitals provide stabilisation in the transition state. This improves the rate of the SN2 reaction and also causes the SN2 reaction to be favoured over SN1.
Back to more SN2 reactions
Alternatively, use these links: (Substrate: Nucleophile)
Allyl chloride : SH | Benzyl chloride : SH | 2o benzyl chloride : SH | 2o allyl chloride : SH (SN2′)
R. H. DeWolfe and W. G. Young, Chem. Rev., 1956, 56, 753–901.
J. W. Hill and A. Fry, J. Am. Chem. Soc., 1962, 84, 2763–2769.
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