Diphenylphosphine: Phosphine, diphenyl

If the assumption of this reaction sequence is correct, the photolysis of tetraphenylphosphonium chloride must then only lead to biphenyl, diphenylphosphine, ethyl diphenyl-phosphinate and triphenylphosphine and its oxidation products. After 2 h of irradiation, biphenyl, diphenylphosphine and its oxidation products, triphenylphosphine and triphenylphosphine oxide, in a ratio of 3 1 5, along with raw material, are obtained. Ethyl diphenylphosphinate was detected in trace amounts7. These results support the postulate of the reversibility of phosphoranyl radical formation in such systems and indicate one-electron transfer processes15 in the formation and decomposition of the tetraarylphosphonium cation. This reaction is comparable to the observation of an electron transfer from halide ions to hydroxyl radicals or hydrogen atoms in aqueous solutions16,... 

Bis(diphenylphosphino)ethane]nickel(ll) chloride cancer suspect agent Nickel, dichloro[ethylenebis[diphenylphosphine]]- (8) Nickel, dichloro[1,2-ethanediylbis[diphenylphosphine]-P.P ]- (SP-4-2)- (9) (14647-23-5) Diphenylphosphine pyrophoric Phosphine, diphenyl- (8,9) (829-85-6) 1,4-Diazabicyclo[2.2.2]octane (DABCO) (8,9) (280-57-9)... 

Dimeric zinc complexes of tertiary phosphines, [Zn(PR3)I2]2, are also formed from zinc powder and R3PI2, (R = Me, Et, n-Pr, ra-Bu). The crystal structure of the ethyl derivative demonstrates the dimeric nature of the complexes.295 Metallation of diphenylphosphine with ZnEt2 results in a trimeric species with a Zn3P3 core and bridging diphenyl phosphide ligands. Two protic (HPPh2)... 

Diphenyl phosphorszldate can be replaced with diethyl phosphorazidate in the above procedure. Use of other azides such as p-toluenesulfonyl azide, p-methoxybenzyloxycarbonyl azide, diphenylphosphinic azide, or diphenylthio-phosphinic azide is less satisfactory. No reaction occurs when trimethylsilyl azide, dimethylthiophosphinic azide, or alkaline azides are used, while decomposition of formed trimethylsilyldiazomethane seems to occur when... 

Scheme 7.8 Formation of a7l(diphenyl)phosphine oxide from propargylic alcohol and diphenylphosphine oxide.

Several mixed-metal clusters containing platinum and cobalt are known and some of them have been employed as methanol homologation catalysts.1 Among them, the title compound2 was first prepared unambiguously from the reaction of dichloro[l,2-ethanediylbis(diphenylphosphine)]platinum with sodium tetracarbonylcobaltate, Na[CO(CO)4]. The compound also may be prepared by the reaction of [l,2-ethanediylbis(diphenyl-phosphine)]bis(phenylethynyl)pIatinum with Co COJg.1... 

Diphenylphosphinic acid Phosphinic acid, diphenyl- (8,9) (1707-03-5) Benzaldehyde (8,9) (100-52-7)... 

Diphenylphosphinous Acid by UV Irradiation of Aroyl Diphenyl Phosphines... 

In a competing and novel type of photoreaction, aroyl diphenyl phosphines 1d - k yield diphenylphosphinous acid (4, diphenylphos-phine oxide) as the photoproduct of a complex transfer of the oxygen from the carbonyl carbon onto the phosphorus atom followed by C-P-bond cleavage and hydrogen abstraction from solvent. The mass spectrometric product analysis of an u.v. irradiation experi-... 

A previous description of the synthesis of (CH3)3SiP(C6H5)2 in Inorganic Syntheses1 involves the initial preparation of sodium diphenylphosphide from diphenylphosphinous chloride. This method of preparation of the diphenylphosphide anion requires rigorous conditions and long reaction times. At least two other easier methods of preparation of the diphenylphosphide anion (lithium counterion) are known. One synthesis uses diphenyl-phosphine and n-butyllithium2 as reactants, whereas the second uses triphenylphosphine and elemental lithium.3,4 The second method is described here. 

Diphenyl(trimethylsilyl)phosphine is a colorless liquid that yellows upon standing. Like diphenylphosphine, it has a very bad odor and is reactive toward water and oxygen. The 1H n.m.r. spectrum shows a doublet (./p h = 4.9 Hz.) which is assigned to methyl protons on silicon at 8 = —0.14 p.p.m. (TMS) and a complicated multiplet from 8 = —7.0 to —8.6 p.p.m. which can be assigned to the phenyl protons. 

Boiling a solution of (2,2-dimethylhydrazino)diphenyl-phosphine in benzene overnight in contact with dry air causes precipitation of the oxide, (C8H5)2P(0)NHN(CH3)2 (m.p. 167 to 168°). Addition of a stoichiometric amount of sulfur to a boiling benzene solution of (2,2-dimethylhydrazino) diphenylphosphine yields, on cooling, the sulfide, (C H5)2P(S)NHN(CH3)2 (m.p. 95.5 to 97.0°). Alkylation to [(C6H5)2(CH3)PNHN(CH3)2]I (m.p. 156 to 158°) occurs upon reaction with methyl iodide in ether. Reaction with chloramine in ether yields the aminophosphonivun salt, [(C,H,)2P(NH2)NHN(CH,)2]C1 (m.p. 195°). All of the above-described derivatives are colorless solids. 

Phosphines add to alkenes to give alkyl phosphines and to alkynes to give vinyl phosphines. In the presence of an ytterbium (Yb) catalyst, diphenylphosphine added to diphenyl acetylene to give the corresponding vinyl phosphine. A palladium catalyst was used for the addition o-diphenylphosphine to terminal alkynes, giving the anti-Markovnikov vinyl phosphine but a nickel catalyst led to the Markovnikov vinyl phosphine.Alkenes also react with diarylphosphines... 

FeBgCigHso, [l,l-commo-bis(2,3-dicarba-l-ferra-c/oio-heptaborane)](12),2,2, 3,3 -tetraethyI-l,l-dihydro-, 22 215 FeBrMg02PC29H4s, Magnesium, bromo(Ti -cyclopentadienyI)[l, 2-ethanediyl-bis(diphenylphosphine)]bis-(tet ahy-d ofu an)i on-, (Fe-Mg), 24 172 FeBrP2C3iH29, Iron, bromo(Ti -cyclopenta-dienyl)[l,2-ethanediylbis(diphenyl-phosphine)]-, 24 170 FeQO, Iron chloride oxide intercalate with 4-aminopyridine (4 1),22 86... 

Pd2Cl2P4C5,H44, Palladium(I), (x-carbonyl-dichlorobis[methylenebis(diphenyl-phosphine)]di-, 21 49 PrCL, Praseodymium chloride, 22 39 PrFi8Ns06Pi2C72H72, Praseodymium(III), hexakis(diphenylphosphinic amide)-, tris(hexafluorophosphate), 23 180 PrN30,3C8H,6, Praseodymium(III), trini-trato( 1,4,7,10-tetraoxacy clododecane)-, 23 151... 

HiBFJriCwHv, Iridium(l +), [1,4-buta-nedi-bis(diphenylphosphine)]di-, tetra-fluoroborate( I -), 27 26 Hpropanediylbis(diphenyl-phosphine)]di-, tetrafluoroborate (I-), 27 22... 

Tunney and Stille88 described the coupling of diphenyl(trimethylsilyl)phosphine or (trimethylstan-nyl)diphenylphosphine with various aryl halides, in the presence of a palladium catalyst, to give aryldiphenylphosphines, e.g., (56), according to Equation (17). Unfortunately the reaction conditions are not compatible with functional groups such as N02, CHO, NH2, or OH. 

A number of unusual chelating diphosphines have been prepared. The bicycloalkenyl compound (45) reacts with diphenylphosphine to form the diphosphine (46). Diphenyl(o-vinylphenyI)phosphine is dimerized on heating with rhodium(ni)... 

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