作者:Richard C. Cambie、David S. Larsen、Peter S. Rutledge、Paul D. Woodgate
DOI:10.1039/p19810000058
日期:——
‘thiocyanogen bromide’ prepared from equimolar amounts of bromine and thallium(I) thiocyanate in wet chloroform, gives moderate to high yields of vic-bromothiocyanates. The addition proceeds by an ionic mechanism involving nucleophilic attack of a bromide ion on an S-cyanothiiranium cation. Unlike vic-iodothiocyanates, the vic-bromothiocyanates are not readily isomerized to the corresponding vic-halogenoisothiocyanates