atoms of the congeneric main-group V (15) elements into the two centrosymmetrically related (opposite) vertices of the icosahedral cage. The formulation of 2 in the [NMe4]+ salt was established unambiguously from X-ray crystallography and ascertained from a complete elemental analysis. This air-sensitive brown compound was also characterized by IR, cyclic voltammetry, negative-ion ESI mass spectrometry
在低温(-78°C)下,[Ni 6(CO)12 ] 2-(1)与MeBiCl 2在THF中的设计反应产生了所需的[Ni 10(BiMe)2(CO)18 ] 2 -二价阴离子(2)为主要产物(约45%的收率)。包含非中心1,1-Ni 10 Bi 2二十面体笼的这种广受欢迎的(甲基双变亚基)
镍羰基镍簇是已知同源[Ni 10(
EMe)2(CO)18 ] 2-的缺失成员。系列(E = P,As,Sb),其成员彼此不同之处仅在于将同构主族V(15)元素的两个桥接E原子替换为二十面体笼的两个中心对称相关(相对)的顶点。[NMe 4 ] +盐中2的配方由X射线晶体学确定,并通过完整的元素分析确定。该空气敏感的棕色化合物还通过红外,循环伏安法,负离子ESI质谱和低温13 C 1 H}和1 H NMR光谱进行了表征。乙基双mut亚基[Ni 10 ]的[NMe 4 ] +盐(BiEt)2(CO)18 ]