Issue 8, 1987

Preparation and characterisation of dicarboxylatobis(η-cyclopentadienyl)-tungsten(IV) complexes: a novel and convenient synthesis from [W(η-C5H5)2H2] using molecular oxygen as a hydrogen acceptor

Abstract

The reactions of [W(η-C5H5)2H2](1) with carboxylic acids under various conditions were investigated. At room temperature in the dark, the reaction afforded reversibly [W(η-C5H5)2H3]+(3), whereas the same reaction under irradiation by light yielded [W(η-C5H5)2(OCOR)2](2)[R = Me, Et, CH2[double bond, length half m-dash]C(Me), or H] in small amounts. Addition of 1 equivalent of O2 to the reaction system significantly improved the yields of (2) producing water as a by-product. Complexes (2) containing unidentate carboxylate were characterised by i.r. and 1H n.m.r. spectra and by elemental analyses. The formation of the species [W(η-C5H5)2(OCOMe)(H2O)]+ was proposed on the basis of the 1H n.m.r. measurements of (2; R = Me) in CD3CO2D containing D2O.

Article information

Article type
Paper

J. Chem. Soc., Dalton Trans., 1987, 1857-1860

Preparation and characterisation of dicarboxylatobis(η-cyclopentadienyl)-tungsten(IV) complexes: a novel and convenient synthesis from [W(η-C5H5)2H2] using molecular oxygen as a hydrogen acceptor

T. Ito and T. Nakano, J. Chem. Soc., Dalton Trans., 1987, 1857 DOI: 10.1039/DT9870001857

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