BIS(LIGAND)METALL-KOMPLEXE VON NICKEL, PALLADIUM UND PLATIN MIT CYCLISCHEN LIGANDEN VOM DIVINYLBORAN-TYP

Article abstract of DOI:10.1016/S0022-328X(00)88552-6

Nine complexes of type ML2 with M = Ni, Pd, Pt and L = X(CH=CH)2BC6H5 (X = (CH3)2C, (CH3)2Si, (CH2)2) are described.The X-ray structural analysis of Ni<(CH3)2Si(CH=CH)2BC6H5>2 and the 1H and 11B NMR spectra demonstrate a sandwich-type bis(η⁵-divinylborane)metal structure with C₂ molecular symmetry.All complexes show exceptional thermal stability as compared to the corresponding bis(1,5-cyclooctadienyl)metal complexes.In the 1H NMR spectra internal rotation of the two ligands with respect to each other is observed for two Pd complexes and the Pt complexes at room temperature.