WCl(η<sup>2</sup>-C<sub>2</sub>Ph<sub>2</sub>)(η<sup>6</sup>-C<sub>6</sub>Ph<sub>6</sub>H): A Compound Containing a Metallacycloheptatriene Unit from Trimerization of Diphenylacetylene with W(NMe<sub>3</sub>)(η<sup>2</sup>-C<sub>2</sub>Ph<sub>2</sub>)<sub>3</sub>
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W(NCMe)(η2-C2Ph2)3 (1) has been previously synthesized by the reaction of W(CO)(η2-C2Ph2)3 with Me3NO in acetonitrile, while the same treatment in THF leads to the trimethylamine complex W(NMe3)(η2-C2Ph2)3 (2). Compound 2 is reactive. Stirring a mixture of 2 and diphenylacetylene in dichloromethane at room temperature affords WCl(η2-C2Ph2)(η6-C6Ph6H) (3), which apparently arises from trimerization of the alkyne ligands concomitant with solvent activation. The structures of 1−3 have been determined by an X-ray diffraction study. A carbene WC double bond is evidenced in 3.
创建时间：
2016-08-26
