Tetra­carbon­yl[bis­(diphenyl­phosphan­yl)tetra­methyl­disiloxane-κ2 P,P′]chromium(0)

The title compound, [Cr(C28H32OP2Si2)(CO)4], was obtained by the ligand-exchange reaction of Cr(CO)6 with (Ph2PSiMe2)2O in refluxing toluene. The CrC4P2 coordination geometry is distorted octa­hedral, with a P—Cr—P bite angle of 99.22 (4)°

Diacetonitrile[N,N′-bis(2,6-diisopropyl­phenyl)ethane-1,2-diimine]dichloridochromium(II) acetonitrile solvate

The title compound, [CrCl2(CH3CN)2(C26H36N2)]·CH3CN, was synthesized by the reaction of CrCl2(THF)2 with N,N′-bis­(2,6-diisopropyl­phen­yl)ethane-1,2-diimine in dichloro­methane/acetonitrile. The chromium center is coordinated by two N atoms of the chelating diimine ligand, two chloride ions in a trans configuration with respect to each other, and by two N atoms of two acetonitrile mol­ecules in a distorted octa­hedral geometry

Recursos, intereses y difusión de modelos para la política regional de I+D: la Comunidad de Madrid

Se agradece la financiación de la CICYT a través del Plan Nacional de I+D (SEC1999-0829-C02-01), así como las facilidades otorgadas por la Dirección general de Investigación de la Comunidad de Madrid, especialmente por Francisco Rubia y Alfonso González Hermoso

[2,2-Bis(diphenyl­phosphan­yl)propane-κ2 P,P′]tetra­carbonyl­chromium(0) dichloro­methane monosolvate

The title compound, [Cr(C27H26P2)(CO)4]·CH2Cl2, was obtained by the reaction of Ph2PCMe2PPh2 with Cr(CO)6 in refluxing toluene by substitution of two carbonyl ligands. The CrC4P2 coordination geometry at the Cr atom is distorted octa­hedral, with a P—Cr—P bite angle of 70.27 (2)°

Bis[N,N′-bis­(2,6-diisopropyl­phen­yl)ethane-1,2-diimine]-1κ2 N,N′;2κ2 N,N′-tri-μ-trichlorido-1:2κ6 Cl:Cl-chlorido-1κCl-tetra­hydro­furan-2κO-dichromium(II) dichloro­methane 4.5-solvate

In the mol­ecular structure of the title compound, [Cr2Cl4(C26H36N2)2(C4H8O)]·4.5CH2Cl2, the two CrII centers are bridged by three Cl atoms, forming a dinuclear complex. Each CrII center is coordinated by one chelating bis­(2,6-diisopropyl­phen­yl)ethane-1,2-diimine ligand via both N atoms. An additional chloride ion binds to one chromium center, whereas an additional tetra­hydro­furan mol­ecule coordinates to the second CrII center. The coordination geometry at each CrII center can be best described as distorted octa­hedral

[Bis(diphenyl­phosphan­yl)dimethyl­silane-κ2 P,P′]tetra­carbonyl­chromium(0)

The title compound, [Cr(C26H26P2Si)(CO)4], was obtained by the reaction of Ph2PSiMe2PPh2 with Cr(CO)6 in refluxing toluene by ligand exchange. The CrC4P2 coordination geometry at the Cr atom is distorted octa­hedral, with a P—Cr—P bite angle of 80.27 (1)°

N,P,P-Triisopropyl­phosphinic amide

The title compound, C9H22NOP, was obtained by slow diffusion of oxygen into a toluene solution of iPr2PNHiPr. In the crystal, an inter­molecular N—H⋯O hydrogen bond occurs

Tetra­carbon­yl[N-(di­phenyl­phosphanyl-κP)-N,N′-diisoprop­yl-P-phenyl­phospho­rus di­amide-κP]molybdenum(0) with an unknown solvent

The title complex, [Mo(C24H30N2P2)(CO)4], contains a molybdenum centre bearing a P,P′-cis-chelating Ph2PN(iPr)P(Ph)NH(iPr) and four carbonyl ligands in a distorted octa­hedral coordination geometry. This results in a nearly planar four-membered metallacycle. In the crystal, mol­ecules are linked by N—H...O and C—H...O hydrogen bonds to form layers parallel to the ac plane. For the final refinement, the contributions of disordered solvent mol­ecules were removed from the diffraction data with SQUEEZE in PLATON [Spek (2015). Acta Cryst. C71, 9–18]. The given chemical formula and other crystal data do not take into account the unknown solvent mol­ecule(s)

1-Di­phenyl­phosphanyl-2-(di­phenyl­phosphor­yl)hydrazine

The title compound, C24H22N2OP2, is an asymmetrically substituted hydrazine derivative bearing a phosphoryl and a phosphanyl substituent. The PNNP backbone has a torsion angle of −131.01 (8)°. In the crystal, mol­ecules form centrosymmetric dimers by inter­molecular N—H...O hydrogen bonds, which are further linked into a three-dimensional network by weak C—H...O and C—H...π inter­actions

2,4-Bis(diphenyl­phosphan­yl)-1,1,2,3,3,4-hexa­phenyl-1,3-diphospha-2,4-dibora­cyclo­butane tetra­hydro­furan sesqui­solvate

In the title compound, C60H50B2P4·1.5C4H8O, the diphospha­diborane mol­ecule lies on an inversion centre, whereas the disordered tetra­hydro­furan solvent mol­ecule is in a general position with a partial occupancy of 0.75. The diphosphadiborane mol­ecule consists of an ideal planar four-membered B2P2 ring with an additional phenyl and a –PPh2 group attached to each B atom