The tetracarbonyls of niobium(I) and tantalum(I), M(η5-9-phenylfluorenyl)(CO)4, have been prepared from the dinuclear tetracarbonyl anions [M2(μ-Cl)3(CO)8]− and Li(9-phenylfluorenyl). A slightly distorted four-legged piano stool geometry, due to the presence of the sterically demanding phenyl substituent, has been found in the case of the niobium derivative. The crystal and molecular structures of Zr(fluorenyl)2Me2
铌(I)和钽(I)的tetracarbonyls,M(η 5 -9-苯基芴基)(CO)4,已经从双核四羰阴离子制备[M 2(μ-Cl)的3(CO)8 ] - Li(9-苯基芴基)。在铌衍生物的情况下,由于存在空间上要求的苯基取代基,已经发现四脚钢琴凳的几何形状略有变形。Zr(芴基)2 Me 2和9-苯基取代的衍生物的晶体和分子结构已得到解决。Zr(芴基)2 Me 2的结构与已知的二氯化物Zr(芴基)2的结构相似Cl 2,其中存在不同触觉的芴基配体。在另一方面,以Zr使用更多空间要求的苯基取代的芴基配体的(η 5 -9-苯基芴基)2我2,诱导芴基配体是对称和pentahapto协调到锆。