R1R2C= CC1R3+ O3-R1R2C+ OO-+ R3COC1 (1) chlorine atom on C-1 of a terminal olefin, there is the additional advantage that the acid chloride is formyl chloride, which rapidly decomposes into carbon monoxide and hydrogen chloride. This is the strategy that we have used in the present work to examine the reaction of HC1 with a number of carbonyl oxides, most of which have no electronegative substituent in the a position. In Tables I and I1 we ...