Experimental l-Acetyl-2, 2-dimethyl-3-(2-methyl-l-propenyl)-cyclopro-pane.-Following the procedure of Cason, Sumrell and Mitchell1* the cadmium Grignard reagent was prepared using 33.5 g. of magnesium, 200 g. of methyl iodide and 200 g. of anhydrous cadmium chloride, with 400 ml. of dry benzene to displace by distillation the 1 liter of ether used in preparation of the methyl Grignard. To the cadmium Grignard reagent thus prepared was ...