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• W1969031583 abstract "Abstract The title compounds have been studied by single-crystal X-ray diffraction. Both structures can be described as distorted octahedra. P—Ru—P angles between phosphorus atoms at mutually cis positions are considerably larger than 90°, with the sum of the cis angles amounting to 495.6° for (Me3P)4RuH2 (1) and to 486.2° for [P[(CH2)3PMe2]3] RuH2 (2). These structural parameters and the observed bending over of the two axial donor sets toward the hydrido ligands, which results in trans P—Ru—P angles of 151.5° for complex 1 and of 153° for structure 2 averaged over four crystallographically independent molecules, suggest a considerably higher degree of steric encumbrance in cis-(Me3P)4Ru than in [P[(CH2)3PMe2]3]Ru systems. They thus correspond to both the well-known ability of the [P[(CH2)3PMe2]3]Ru(0) fragment to insert across CH bonds of non-coordinated hydrocarbons and the propensity of cis-(Me3P)4Ru(0) to undergo spontaneous cyclometallation. Selected bond lengths of compound 1 are: Ru—P (trans ligand H), 2.306(1) and 2.306(2) A; Ru—P (trans to each other), 2.276(1) and 2.289(2) A. For the averaged structure 2, the mean distances between the central metal and the donor atoms are 2.270(5) A for the bridging phosphorus atom, 2.292(6) A for the PMe2 group trans to hydrogen, and 2.281(7) and 2.284(10) A for the PMe2 substituents situated at mutually trans positions." @default.
• W1969031583 created "2016-06-24" @default.
• W1969031583 creator A5046016273 @default.
• W1969031583 creator A5087660343 @default.
• W1969031583 date "1993-02-01" @default.
• W1969031583 modified "2023-09-27" @default.
• W1969031583 title "Oligophosphine ligands—XXXVII. Stereochemical features of complexes containing the cis-L4Ru fragment: molecular structures of (Me3P)4RuH2 and [P[(CH2)3PMe2]3]RuH2" @default.
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• W1969031583 doi "https://doi.org/10.1016/s0277-5387(00)81748-9" @default.
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