Abstract: The rates of solvolysis of derivatives of 7-methyl-7-hydroxynorbornane (I), anri-7- methyl-syn-7-hydroxynorbornene (11), and syn-7-methyl-anti-7-hydroxynorbornene (111) were determined. In addition, the corresponding values for the trideuteriomethyl analogs were measured. The methyl/hydrogen rate ratio was found to vary from 1.3 x lo8 for the saturated system (I) to 4.4 x 10'for the anti-p-nitrobenzoates in the unsaturated cases (111) ...