with H2S2 or Na2S2 leads to the formation of bis-(dialkylboryl)disulfanes,R2B-S-S-BR2(VI). This new class of compounds exhibits a high thermal, but a low hydrolytical, stability. Attempts to obtain diborylsulfanes, R2B-S-BR2(V), by removing one sulfur atom from (VI) result in products formed by the rearrangement of (V). The reaction of disilthiane with dialkylhaloborane yields (V), stable only in solution
二烷基
碘硼烷与
硫之间的氧化还原反应以及二烷基卤
硼烷与H 2 S 2或Na 2 S 2的反应导致形成双-(二烷基
硼基)二
硫醚R 2 B-SS-BR 2(VI)。这类新化合物显示出高的热稳定性,但
水解性却很低。尝试获得二
硼烷基
硫烷,R 2 B-S-BR 2(V),通过从(VI)中除去一个
硫原子得到由(V)的重排形成的产物。二甲
噻吩与二烷基卤
硼烷的反应产生(V),仅在溶液中稳定。稳定的二
硼烷基
硫烷是由二苯基
碘硼烷和甲
硅烷基或
硫,以及通过合适的
硼烷基
硫醚的热缩合而获得的。