Two S-brnmo-ol-haloamides were allowed to react in the presence of sodium hydroxide and bromide ion to form gem-dihalides Potassium bromide-82 was utilized internally and externally in separate experiments to establish (1) the degree of retention of bromine in the gem-dihalide product and.(2) the extent to which external bromide ion was incorporated in the gem-dihalide. With S-bromo-a-chloroisobutyramide under cold, 0', conditions, ...