(±)-2-endo-Hydroxymethyl-1, 4, 5, 6, 7, 7-hexachlorobicyclo [2.2. 1] hept-5-ene and (±)-2- endo-acetoxymethyl-1, 4, 5, 6, 7, 7-hexachlorobicyclo [2.2. 1] hept-5-ene were resolved by using various hydrolases to afford enantiomerically enriched products with ees of 94–98%. The absolute configuration was determined by transforming 2-endo-acetoxymethyl-1, 4, 5, 6, 7, 7-hexachlorobicyclo [2.2. 1] hept-5-ene into 2-endo-hydroxymethyl-bicyclo [2.2. 1] hept- ...