Experimental (CH,), SiF,(CH,)? SiF,, CH3SiF3.-These compounds were prepared in a three- necked flask by adding the corresponding chlorosilane* to technical zinc fluoride that ha: been dried at 110'for twenty-four hours and cooled to 30 in the flask. The gas that was evolved in each case was passed through a water-cooled reflux condenser (which returned some of the unreacted chlorosilane), to a trap cooled by a mixture of Dry Ice and acetone. ...