8-Iodo-1,2-dicarba-closo-dodecaborane (7) was prepared in three steps starting from decaborane-14 with 20% overall yield. In the presence of nucleophiles, compound 7 undergoes selective removal of the boron vertex in the position para to the iodine substituent to form the anionic nido-carborane 1-iodo-7,8-dicarba-nido-undecaborate. Capping of the corresponding dicarbollide dianion with BI3 led to formation
8-
碘-1,2- dicarba-闭合碳-dodecaborane(7)在从十
硼烷-14与20%的总收率开始的三个步骤制备。在亲核试剂的存在下,化合物7在
碘取代基对位的位置上选择性除去
硼顶点,以形成阴离子的Nido-碳
硼烷1-iodo-7,8-dicarba-nido-十一
硼酸酯。用BI相应dicarbollide二价阴离子的封盖3导致形成新的碳
硼烷,3,10-二
碘-1,2- dicarba-的闭合碳-dodecaborane(15)。相同的二咔二酮二价阴离子与
钴和
乙酰丙酮镍在无
水四氢呋喃中反应,形成相应的双(二咔二酮)配合物,收率很高。所有化合物均通过多核NMR和高分辨率质谱进行了表征。2- iododecaborane(的结构2),8-
碘-1,2- dicarba-闭合碳-dodecaborane(7),1-乙氧羰基-8-
碘-1,2- dicarba-闭合碳-dodecaborane(10),
铯1-
碘-7