On reaction of methyl-and ethylmagnesium bromides with I, different types of reaction products were obtained again. In the case of niethylmagnesium bromide, attempts at isolation of carbinol failed as under mild conditions spontaneous rearrangement occurred to afford 3, 4-dimethyl-(p, P, P-trichloroethyl) benzene (II1) in yields varying from 30 to 50% depending on reaction conditions. With ethylmagnesium bromide the results were entirely ...