Electrophilic substitution of the nido-dicarbaborate anion 7,8-nido-C2B9H12− with sulfenyl chlorides†
Abstract
Sulfenyl chlorides RSCl (R = p-C6H4OMe, Ph, p-C6H4NO2, CN or 2-C5H4N) react with 7,8-nido-C2B9H12− with asymmetric substitution on the pentagonal C2B3 face to give 9-RS-7,8-nido-C2B9H11− (R = p-C6H4OMe (3), Ph (4), p-C6H4NO2 (5), CN (6)) and the zwitterion 9-(S-2-C5H4NH)-7,8-nido-C2B9H11 (7), respectively, in high yield, while tBuSCl did not react and S2Cl2 led to