摘要:
Two new half-sandwich trinuclear Rh2M (M = Ni, Pd) complexes bridged by butyl selenolato and carborane diselenolato ligands, [Cp*Rh{mu-Se2C2(B10H10)}](2)M[mu-Se(C4H9)](2) [M = Ni (4), Pd (5)], have been prepared by the reactions of the [Cp*R{mu-Se2C2(B10H10)}{mu-Se(C4H9)}](-) anion with NiCl2 and Pd(PhCN)(2)Cl-2, respectively. The complexes have been fully characterized by H-1, C-13, and B-11 NMR and IR spectroscopy as well as by element analyses. The molecular structures of 4 and 5 have been determined by single-crystal X-ray diffraction analyses, which show the central MSe4 moiety in a slightly distorted square-planar coordination geometry for M = Ni, Pd. sandwich complexes of the type [Cp*M{E2C2(B10H10)}] (Cp* = eta(5)-C5Me5 M = Co, Rh, Ir; E = S, Se), which can be used for further transformations in a controlled way under various conditions.(8-12) Owing to their rigid backbone, our recent studies have focused on the development of the rational methods to obtain the metal-chalcogenido cores with desired metal and chalcogen compositions. In this paper, we report the synthesis of the [Cp*Rh{mu-Se2C2(B10H10)}{mu-Se(C4H9)}](-) anion as the metallaligand to react with transition metal compounds to afford the half-sandwich mixed-metal trinuclear complexes bridged by selenobutyl-diselenolatocarborane ligands.