Tetrachloro- and tetrafluorodiborane(4) add to the double bond in a number of vinyl derivatives of boron, carbon, silicon, germanium, and tin to form 1,2-bis(dihaloboryl)ethyl derivatives. Most of the compounds are stable in vacuo at temperatures in excess of 150°. Tetrachlorodiborane(4) undergoes addition considerably more readily than does tetrafluorodiborane(4). Relative rates of addition have been determined
四
氯和四
氟二
硼烷(4)在许多
硼,碳,
硅,
锗和
锡的
乙烯基衍
生物中加成双键,形成1,2-双(二卤
硼基)乙基衍
生物。大多数化合物在超过150°C的温度下在真空中稳定。与四
氟二
硼烷(4)相比,四
氯二
硼烷(4)的加成要容易得多。已经确定了相对的加成率,并且显示出其显着取决于
乙烯基上取代基的性质。