Abstract: The effects of methanol, ethanol, acetone, nitromathane, dimethylformamide, dimethyl sulfoxide and other above twenty solvents upon the rates for two Mens-chutkin's reactions of triethylamine and benzyl chloride, pyridine and benzyl chloride have been investigated. The data obtained show that the solvation seems to have bearing the interaction between characteristic groups on the reaCtant molecules and those on solvent molecules.