75516-74-4Relevant academic research and scientific papers
Hydrogenolysis of tetra(allyl)tungsten in the presence of tertiary phosphines: synthesis of tris(dmpm)tungsten (0)
Kirss, Rein U.
, p. 171 - 176 (1995)
Reaction of W(η3-C3H5)4 with PMe2Ph and Me2PCH2PMe2 (dmpm) under 1 atm of H2 in toluene at 110-120 deg C yielded WH4(PMe2Ph)4 and W(dmpm)3, respectively.Spectroscopic studies on the hydrogenolysis of W(η3-C3H5)4 in the presence of tertiary phosphines PEt3, PMePh2, and PPh3 were consistent with formation of the tungsten phosphine hydride complexes WH6(PEt3)3, WH4(PMePh2)4 and WH6(PPh3)3.W(η3-C3H5)4 has advantages over similar hydrogenolysis of WMe6 in that W(η3-C3H5)4 is considerably more thermally and air stable.Pyrolysis of WH4(PMePh2)4 at 400 deg C under a hydrogen flow yielded a shiny tungsten powder contaminated by hydrocarbon residues.Keywords: Tungsten; Phosphines; Hydrides; Hydrogenolysis; Hydrogenation
X-ray and neutron diffraction single-crystal studies of tris(phenyldiisopropylphosphine)tungsten hexahydride [WH6(PPh-i-Pr2)3]
Gregson, David,Mason, Sax A.,Howard, Judith A. K.,Spencer, John L.,Turner, David G.
, p. 4103 - 4107 (2008/10/08)
The single-crystal and molecular structure of tris(phenyldiisopropylphosphine)tungsten hexahydride has been determined by X-ray diffraction and subsequently by neutron diffraction. The compound crystallizes in the triclinic space group P1 as follows: X-ray diffraction (200 K) a = 11.490 (6) ?, b = 10.610 (3) ?, c = 16.324 (8) ?, α = 104.76 (3)°, β = 108.04 (4)°, γ = 89.92 (4)°; neutron diffraction (100 K) a = 11.427 (8) ?, b = 10.554 (6) ?, c = 16.249 (6) ?, α = 104.59 (2)°, β = 108.16 (2)°, γ = 89.88 (2)°. The molecule shows approximate C2v symmetry with an asymmetric disposition of the phosphine ligands around the tungsten atom. W-P distances of 2.424 (2), 2.519 (2), and 2.524 (2) ? are observed, and W-H is observed in the range 1.718-1.745 (3) ?. 0020-1669/84/1323-4103$01.50/0
