h)Cl, (1b)AlCl4, and (1b)PF6; (ii) zwitterionic or semiquaternized compounds (type B) with one trigonal and one tetrahedral boron center such as 5, 9, and 10; of these, 5 is fluxional in solution with two effectively equivalent ligands while 9 and 10 display static structures; and (iii) the inverse chelate structure of 11 (type C) which is found in the crystal and in solution.
双(
硼基)
钴铝Co(C 5 H 4 BR 2)2(1)可由CoBr 2(
DME)和碱
金属
硼基
环戊二烯化物M(C 5 H 4 BR 2)(M = Li,Na)(2)制得。以这种方式可以获得两种二烷基
氨基化合物1c(R = NMe 2)和1d(R = NEt 2)。用C 2 Cl 6氧化可提供离子型
钴钴氯化物(1c)Cl和(1dCl。可以通过修饰
硼上的取代基来合成其他
钴ce化合物。用过量的BCl 3处理(1d)Cl得到高反应性的
氯化物Co(C 5 H 4 BCl 2)(C 5 H 4 BCl 3)(5)。然后对5进行Pinacolysis,得到单取代产物Co [C 5 H 4 B(OCMe 2)2 ](C 5 H 4 BCl 3)(9)和分解产物[Co C 5 H 4B(OCMe 2)2 } 2 ] Cl [(1h)Cl]分别取决于
化学计量和反应条件。5与
四甲基锡的反应用甲基取代两个
氯原子,得到Co(C