The Tungsten-Tungsten Triple Bond. 8.(1) Dinuclear Alkoxides of Tungsten (III) and Structural Characterization of Hexakis-(Isopropoxy)Dipyridinoditungsten. The First Compound with Four-Coordinated Tungsten Atoms United by a Triple Bond.

摘要

The great majority of compounds containing metal-metal triple bonds of the x3mmx3 type where X is a monodentate ligand (including some where the ligand atmos are not all the same) have perfectly, or almost perfectly, staggered ethane-like rotational conformations. The great majority of compounds containing metal-metal quadruple bonds are of the type X4MMX4 ( again including those where more than one type of ligand is present) and have essentially eclipsed rotational conformations. The relatively few exceptions to each of these generalizations are of interest because they provide further insight into the nature of metal-metal multiple bonds.