a Experiments have shown that a number o. of factors affect the relative rates of Sn1 and SN2 reactions. The most important 引 factors are The structure of the substrate a The concentration and reactivity of the nucleophile(for bimolecular reactions ①D on The effect of the solvent d- The nature of the leaving groupOrganic Chemistry Organic Chemistry Xiamen Xiamen University University Experiments have shown that a number of factors affect the relative rates of S N1 and S N2 reactions. The most important factors are: „ The structure of the substrate. „ The concentration and reactivity of the nucleophile (for bimolecular reactions only). „ The effect of the solvent. „ The nature of the leaving group