1054-59-7Relevant academic research and scientific papers
DIPHOSPHINE DERIVATIVES. Part VIII. Tetraphenyldiphosphine dioxide and tetraphenyldiphosphine disulphide: structure and skeletal vibrations. Preparation of diphenyphosphinodiselenoic anhydroselenide, Ph2P(Se)SeP(Se)Ph2
Blake, A.J.,McQuillan, G. P.,Oxton, I. A.,Troy, D.
, p. 265 - 272 (1982)
The X-ray powder diffraction pattern for tetraphenyldiphosphine dioxide Ph2P(O)P(O)Ph2 can be satisfactorily indexed on the assumption that the compound is isomorphous with tetraphenyldiphosphine disulphide.Calculated crystal data for the dioxide are: monoclinic, P21/c, a = 9.44(1), b = 15.62(3), c = 13.87(3) Angstroem, β = 98.0(1)0 Z = 4.The P-P stretch is assigned in the Raman spectrum of the disulphide at 536 cm-1 and in dioxide at the usually high frequency of 601 cm-1.The reaction of tetraphenyldiphosphine with KSeCN in acetonitrile leads to oxidation of the phosphorous and selenium insertion into the P-P bond, yielding Ph2P(Se)SeP(Se)Ph2, diphenylphosphinodiselenoic anhydroselenide, previously only identified in solution.
Reaction of quinoline-5,8-diones with selected charged phosphorus nucleophiles
Nycz, Jacek E.,Malecki, Grzegorz,Chikkali, Samir,Hajdok, Imre,Singh, Priti
, p. 564 - 572 (2012)
The redox reactivity of the two quinoline-5,8-dione derivatives2-methyl-5, 8-dioxo-5,8-dihydroquinoline-7-amine (2a) and N-(2-methyl-5,8-dioxo-5,8- dihydroquinolin-7-yl)acet-amide (2b)has been demonstrated by their reaction with negatively charged three-c
New look into the synthesis of polyhalogenoarylphosphanes
Nycz, Jacek E.
experimental part, p. 2605 - 2612 (2010/08/06)
The present study shows new aspects of the synthesis of polyhalogenoarylphosphanes. The sterically hindered anions Ph(R)P-Y- (1a-c, Y = O, lone pair; R = Ph, But) have been used to show the complexity of the reaction between phosphorus nucleophiles and hexahalogenobenzenes or 9-bromofluorene (E3). The Ph(But)P-O-(1a) anion reacts with hexachlorobenzene (E1), hexafluorobenzene (E2), or E3 to give Ph(R)P(O)X (4a-c, X = F, Cl, Br) with the release of the corresponding carbanion as a nucleofuge, followed by side reactions. In contrast, the lithium phosphides Ph(R)PLi (1b,c) react with hexahalogenobenzenes to give the corresponding diphosphanes 5a,b as the main product and traces of P-arylated products, i.e., Ph(R)P-C6X 5 (10a,b, X = Cl, F). Unexpectedly, Ph(But)PLi (1b) reacts with an excess of 9-bromofluorene to give only halogenophosphane Ph(Bu t)P-X. Taylor & Francis Group, LLC.
New approaches to the synthesis of diphosphine dioxides and hypophosphoric acid esters
Nycz, Jacek E.,Musiol, Robert
, p. 310 - 316 (2007/10/03)
An union >P-O- has been applied as an efficient synthetic precursor of four coordination compounds of the R2P(O)-(O)PR 2 type, namely diphosphine dioxides (R = alkyl, aryl) as well as hypophosphoric acid esters (R = alkoxy, aryloxy), in a one-pot reaction. Furthermore, there were elaborated some mechanistic aspects of the origin of the >P(O)-O-(O)PP-O- and >P(O)X (X= Cl, Br) electrophiles. Attention is focused on the synthesis of the >P(O)-(O)P compounds.
(2,4,6-Trimethylbenzoyl)diphenylphosphine oxide photochemistry. A direct time-resolved spectroscopic study of both radical fragments
Sluggett, Gregory W.,Turro, Claudia,George, Michael W.,Koptyug, Igor V.,Turro, Nicholas J.
, p. 5148 - 5153 (2007/10/02)
The photochemistry of (2,4,6-trimethylbenzoyl)diphenylphosphine oxide (1) has been investigated using time-resolved infrared (TRIR) and time-resolved UV spectroscopy (laser flash photolysis (LFP)), in addition to conventional photochemical steady-state te
Reactions of P_Cl compounds in presence of SMI2
Sasaki, Mitsuru,Collin, Jacqueline,Kagan, Henri B.
, p. 2493 - 2496 (2007/10/02)
Conversion of P-Cl to P-H and P-C bonds are induced by SmI2 in mild conditions. Especially phosphines oxides and sulfides are obtained in good yields.
ELECTRON-TRANSFER PROCESSES. PART 40. REACTION OF ALKYL RADICALS WITH DIPHENYLPHOSPHIDE ANION
Russell, Glen A.,Khanna, Rajive K.
, p. 271 - 274 (2007/10/02)
The anion Ph2P- (K+, 18-crown-6) reacts with t-BuHgCl in HMPA to form Ph2PCMe3 by a free radical chain mechanism.In Me2SO, PhP(O)CMe3 is produced.Reaction of Ph2P- with PhCOCH2HgCl yields the oxidative dimerization product isolable from HMPA but readily converted to Ph2P(O)P(O)Ph2 in Me2SO.
Studies on the Occurence of Hydrogen Transfer, 67. Enediol Diesters by Acylating Electroreductive Dimerization of Acyl Chlorides with Lithium Amalgam
Horner, Leopold,Dickerhof, Karlheinz
, p. 1603 - 1614 (2007/10/02)
Aromatic, aliphatic, and aromatic-aliphatic acyl chlorides (and anhydrides) are transformed by lithium amalgam (Li/Hg) to cis- and/or trans enediol diesters 1-10 (acylating reductive dimerization), mostly in ca. 70percent yields.The influence of the solvent on the reaction course is investigated.Starting from 2,2'-biphenyldicarbonyl dichloride, the phenanthrene 7 is formed; phthalide 8 is the reaction-product using phthaloyl dichloride as starting material.Diphenylphosphinyl chloride is reduced by Li/Hg to tetraphenyldiphosphane dioxide (15).A reaction mechanism for the acylating reductive dimerization is proposed on the basis of the halve-wave potentials determined for 12 acyl chlorides and four 1,2-diketones.The latter are intermediates in the acylating reductive dimerization of the acyl chlorides.Enediol diesters are obtained starting from 1,2-diketones and Li/Hg in the presence of acyl chlorides.Trimethylsilyl chloride is unsuitable as a trap for the enediols; it is preferentially reduced at the Li/Hg interface.Tetrahydrofuran as solvent is transformed to RC(O)O-4-Cl by a known ring-opening acylation reaction in the presence of Lewis acids (LiCl or ZnCl2) formed by the decomposition of Li/Hg and Zn/Hg.
The Behaviour of Oxalyl-bis(diphenylphosphane) Towards Oxygen
Lindner, Ekkehard,Kern, Herbert
, p. 790 - 792 (2007/10/02)
In dependence of the solvent, oxalyl-bis(diphenylphosphane) (1) is oxidized with molecular oxygen either in a radical or an ionic mechanism to give - via the radicals PPh2 and the recombination products 2 (3) - the oxide 2 (4) and 2O (6), respectively.In both cases CO and CO2 are eliminated in nearly equal amounts. - Keywords: Oxidation of Oxalyl-bis(diphenylphosphane), Mechanism
