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Activation of sp<sup>2</sup>and sp<sup>3</sup>carbon–hydrogen bonds via thermolysis of bis(η-cyclopentadienyl)hydridomethyltungsten
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1979
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Inorganic ChemistryChemical EngineeringEngineeringAlkene MetathesisParent Dimethyl CompoundHydrogen BondThermal DecompositionOrganometallic CatalysisHydrogenChemistryTrimethyl PhosphiteMolecular ChemistryChemical Derivative
The methylhydride [W(η-C5H5)2Me(H)] has been prepared by treatment of the compounds [W(η-C5H5)2MeX], where X = I or OCOPh, with Na[AlH2(OCH2CH2OMe)2]. Thermal decomposition of [W(η-C5H5)2Me(H)] in benzene, fluorobenzene, p-xylene, trimethyl phosphite, methanol, or dimethyl (4-tolyl)phosphine evolves methane and the compounds [W(η-C5H5)2R(H)], where R = Ph, C6H4F-3 or -4, CH2C6H4Me-4, OP(OMe)2, OMe, or PH(C6H4Me-4) are formed. Treatment of [W(η-C5H5)2{PH(C6H4Me-4)}H] with methyl iodide gives [W(η-C5H5)2{PH (Me)(C6H4Me-4)}H]+. The oxidation of [W(η-C5H5)2Me2]+ which may be reduced to the parent dimethyl compound.