Siloxyl-bridged diruthenium(II) complexes: structural models for cluster-derived, silica-supported ruthenium catalysts

Oxide- and Zeolite-Supported Molecular Metal Complexes and Clusters: Physical Characterization and Determination of Structure, Bonding, and Metal Oxidation State

“…The results characterizing these and other surface metal complexes lead to the following generalizations: The metaloxygen distances in metal oxide-supported complexes of group 7 and group 8 metals are 2.1 ( 0.1 Å, 150 and these distances are essentially the same as the metal-oxygen distances determined by X-ray diffraction crystallography for complexes of the same metals containing electron donor oxygen ligands, including [Ru(CO) 2 (OCOCF 3 )(µ-OSiMe 2 CH 2 PPh 2 )] 2 152 and [Re-(CO) 3 (µ 3 -OH)] 4 . 153 Thus, metal oxides and zeolites are electrondonor ligands to the supported metal complexes.…”

Si−N Bond Hydrolysis Furnishes a Planar 4-Coordinate 14-Electron Ru(II) Complex with a Triplet Ground State

“…The two polymorphs contain identical molecules (and no solvent guest) but packed differently. The molecules have a crystallographic center of symmetry, so the two identical t BuP 2 CH 2 SiMe 2 O - ligands have trans stereochemistry and the RuO 2 P 2 core is rigorously planar. The Ru−P distance, 2.37772(5) Å, is unexceptional, and the Ru−O distance, 1.9889(9) Å, is short (cf.…”

(Phosphinoalkyl)silanes. 2. Synthesis and spectroscopic properties of the poly(phosphinoalkyl)silanes SiHR[(CH2)nPR'2]2 (R = Me or Ph; n = 2 or 3; R' = Ph or cyclohexyl) and SiH[(CH2)nPR'2]3 (R = Me or Ph; n = 2, R' = Ph or cyclohexyl; n = 3, R' = Ph)

“…Caled (found): C, 73.4 (73.7); H, 8.2 (8.5). The analogues bis-((dicyclohexylphosphino)ethyl)methylsilane (5), bis((dicyclohexylphosphino)ethyl)phenylsilane ( 6), and tris((dicyclohexylphosphino)ethyl)silane ( 7), of 1-3, were prepared similarly from PHCy2, so that after irradiation (100 h) ca. 25 cm from the light source of a mixture of phenyldivinylsilane (1.5 mL, 1.34 g, 8.4 mmol), Et2G (2 mL), and dicyclohexylphosphine (4.0 mL, 3.62 g, 18.2 mmol), removal of solvent and excess phosphine afforded the very viscous liquid 6 (4.34 g, 93%).…”