A series of unsymmetrical organotin bromides has been prepared by the stepwise cleavage of appropriate organotin compounds with bromine in carbon tetrachloride or chloroform at- 50, O or 40'. The bromides have been converted to acetates by treatment with aqueous potassium hydroxide to form bisorganotin oxides, followed by reaction of these intermediate conipounds with glacial acetic acid at 100'.
