Abstract: The structural features in the carbinol and the Grignard reagent, the role of alternative coordination sites on the olefin, the effect of varying the donor solvent, and the role of transition metal catalysts were investigated for the carbomagnesiation of a series of I, I-diphenyl-n-alken-1-ols, where n= 0, I, 2, and 4.. 4llyl-, benzyl-and tert-butylmagnesium bromides in ethyl ether and diallylmagnesium in benzene were shown to add to such ...