Abstract
A series of hydride-bridged dipalladium complexes supported by bis(diphenylphosphino) methane (dppm) ligands has been prepared. The complexes [Pd 2R 2(μ-H) (μ.-dppm) 2 ] PF 6 (R = Me, Et, Bu, CH 2SiMe 3, Ph) were generated by reduction, using NaBH 3CN, of the corresponding halide-bridged species. The products are thermally stable, yellow solids, and they have been characterized by 1H and 31P[ 1H] NMR spectroscopy. The ethyl complex [Pd2Et2(μ-H) (μ-dppm)2]PF 6 has been characterized further by X-ray crystallography. It crystallizes in the monoclinic space group P21 lc with a=10.6160 ( I ), 6=12.8637 (1 ), c=25.3739 (3) A, β=97.479 (1 )° and Z=2. The cation adopts an A-frame structure, with a Pd-Pd distance of 2.9933 (7) Å.
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