33847-61-9

Basic information

• Product Name: fac-tricarbonyl{bis(2-diphenylphosphinoethyl)phenylphosphine}tungsten⁽⁰⁾
• CAS NO: 33847-61-9
• Molecular Weight: 802.439
• Mol File: 33847-61-9.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: fac-tricarbonyl{bis(2-diphenylphosphinoethyl)phenylphosphine}tungsten⁽⁰⁾(CAS DataBase Reference)
• NIST Chemistry Reference: fac-tricarbonyl{bis(2-diphenylphosphinoethyl)phenylphosphine}tungsten⁽⁰⁾(33847-61-9)
• EPA Substance Registry System: fac-tricarbonyl{bis(2-diphenylphosphinoethyl)phenylphosphine}tungsten⁽⁰⁾(33847-61-9)

Safety Data

• Hazardous Substances Data: 33847-61-9(Hazardous Substances Data)

Upstream product

• 81097-61-2 fac-W(CO)3(PMTA) 
• 23582-02-7 bis(2-diphenylphosphinoethyl)phenylphosphine 
• 14040-11-0 tungsten hexacarbonyl 
• 81097-61-2 W(CO)3(1,1,4,7,7-pentamethyldiethylenetriamine) 

Downstream Products

• 136546-90-2 W(CO)3{P(C₆H₅)(C₂H₄P(C₆H₅)2)2(H)}⁽¹⁺⁾*CF₃SO₃^(1-)=W(CO)3{P(C₆H₅)(C₂H₄P(C₆H₅)2)2(H)}(CF₃SO₃) 

Relevant articles and documents

Tungsten(VI) hexahydride complexes supported by chelating triphosphine ligands: Protonation to give η2-dihydrogen complexes and catalytic dehydrogenation of cyclooctane to cyclooctene

Reactions of WCl4(PPh3)2·CH2Cl2 with the chelating triphosphine (triphos) ligands PPh(CH2CH2PPh2)2 (PP2), PPh(C6H4-o-PPh2)2 (TP), and MeC(CH2PPh2)3 (P3) in refluxing benzene or toluene give WCl4(triphos) (triphos = PP2 (1), TP (2), P3 (3)). Treatment of 1-3 with LiAlH4 in Et2O at room temperature followed by hydrolysis in THF at 0°C affords WH6(triphos) (triphos = PP2 (4), TP (5), P3 (6)), which are the first tungsten polyhydride complexes supported by a chelating triphosphine ligand. Variable-temperature 1H NMR spectra and T1 data of 4-6 are consistent with the formulation of them as classical hexahydride complexes containing no η2-H2 ligands. Reaction of 4 with Ph3SiH in refluxing THF gives the rare silyl polyhydide complex WH5(SiPh3)(PP2) (7). Protonation of 4-6 with HBF4·OEt2 in CD2Cl2 at 193 K affords the cationic nonclassical η2-H2 complexes [WH7-2x(η2-H2)x(triphos)] + (triphos = PP2 (8), TP (9), P3 (10); x = 1-3). Deprotonation of 8-10 with NEt3 regenerates the parent hexahydrides 4-6 quantitatively. The variable-temperature 1H NMR T1 data for the hydride resonances of 8-10 are consistent with the nonclassical η2-H2 coordination. The alternative formulation of 8-10 as classical heptahydride complexes (i.e., [WH7(triphos)]+) containing no η2-H2 ligand can be ruled out because it would exceed the maximum oxidation state and coordination number of tungsten. In the presence of tert-butylethylene as a hydrogen acceptor, complexes 4 and ReH5(PP2) (11) are active catalysts for the thermal dehydrogenation of cyclooctane to cyclooctene, whereas their analogues containing monodentate phosphine ligands are inactive under similar conditions.

W(CO)3(PMTA) (PMTA = MeN(CH2CH2NMe2)2) as a starting material for syntheses of W(CO)3(PR3)3, W(CO)3(η6-arene), and the protonated W(H)(CO)3(PR3)3+ complexes

A new and improved method for the synthesis of M(CO)3(PMTA) (M = W, Mo) from M(CO)6 and PMTA (MeN(CH2CH2NMe2)2) is described.The tridentate nitrogen ligand in W(CO)3(PMTA) is replaced, under relatively mild conditions, by tertiary phosphines (PMe3, PEt3, PMe2Ph, PMePh2, PhP(CH2CH2PPh2)2, CH3C(CH2PPh2)3, and Ph2P(CH2)nPPh2 where n = 1, 2) and arenes (C6H6, MeC6H5, p-Me2C6H4, C6Me6, C6H5Cl), which provides a general synthetic method for the preparation of W(CO)3(PR3)3 and W(CO)3(η6-arene) complexes.The reactions of W(CO)3(L)3 with CF3SO3H in CH2Cl2 solution yield the hydrido derivatives W(H)(CO)3(L)3+ which were characterized by their 1H and 31P NMR spectra at different temperatures.These studies show the W(H)(CO)3(L)3+ complexes to be fluxional as a result of both hydride and phosphine ligand migration.