indenyl (6)). While the symmetric compound 3 is paramagnetic, disruption of the symmetry in 4−6 results in diamagnetism. The species [((Nacnac)Ni)2(μ-η5:η5-Cp)][B(C6F5)4] (7) was prepared in an unusual fashion from the reaction of [(NacNac)Ni]2(η6:η6-C6H5Me) (2) with [Ph3C][B(C6F5)4] and Cp2ZrMe2, while compound 3 serves as a synthon to the neutral bimetallic Ni(II)/Ni(I) species [((Nacnac)Ni)2(μ-η2:η2-Cp)]
形式的复合物(Nacnac)的Ni(η 5 -L)(L = CP(3),
茚基(4))容易地制备,并已质子化以产生相应的阳离子物质[(HNacNac)的Ni(η 5 -L )] [B(C 6 F 5)4 ](L = CP(5),
茚基(6))。虽然对称化合物3是顺磁性的,在对称性的破坏4 - 6导致抗磁性。物种[((Nacnac)Ni)的2(μ-η 5:η 5 -CP)] [B(C 6 ˚F 5)4 ](7)在一个不寻常的方式制备从[(NacNac)的Ni]反应2(η 6:η 6 -C 6 H ^ 5 ME)(2)与[PH 3 C] [B(C 6 ˚F 5)4 ] 1和CP 2 ZrMe 2,而化合物3作为合成子到中性双
金属的Ni(II)/
镍(I)物种[((Nacnac)Ni)的2(μ-η 2:η 2 -CP)](8)。化合物7和8容易在电
化学上相互转化。对分子轨道的研究表明,8中不成对的电子