Solvent
SN1Substitution Nucleophilic Unimolecular (1)
polar, protic solvents (H-bonding)
• stronger ion-dipole to solvate/stabilise carbocation intermediate
e.g. Water, alcohol, carboxylic acid
SN2Substitution Nucleophilic Bimolecular (2)
polar, aprotic solvents (non H-bonding)
• Polar enough to solvate the nucleophile but does not participate in H-bonding with the nucleophile (would make Nu less reactive)
e.g. (CH3)2CO, CH3CN
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