Unsymmetrical and Symmetrical Dipalladium Complexes with Bridging Diphenylsilyl Ligands. Structures of (Me3P)Pd(μ-SiHPh2)2Pd(PMe3)2 and [(Me3P)Pd(μ-SiHPh2)]2 in the Solid State and in Solution
Organometallics1998Vol. 17(23), pp. 4929–4931
Citations Over TimeTop 10% of 1998 papers
Abstract
Dinuclear palladium complexes with two bridging diphenylsilyl ligands, [(Me3P)Pd(μ-SiHPh2)]2 (1) and (Me3P)Pd(μ-SiHPh2)2Pd(PMe3)2 (2), were prepared and characterized by X-ray crystallography and NMR spectroscopy. The molecular structure of these complexes suggests an agostic interaction between H of μ-SiHPh2 and Pd. The symmetrical structure of 1 in solution is similar to that found in the crystals and is maintained in the temperature range +25 to −90 °C. The temperature-dependent 1H and 31P{1H} NMR spectra of 2 show dynamic behavior of the molecule caused by exchange of the phosphine ligands. The structure observed at −90 °C in the solution is similar to the crystallographic structure.
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