Copper-Catalyzed Intermolecular Hydroamination of Alkenes
摘要:
Regioselective additions of arylsulfonamides to vinylarenes, norbornene, and cyclohexadiene were achieved using a copper-diphosphine catayst under mild reaction conditions. These processes appear to be ligand-accelerated.
Mechanism of phosphine photolysis. Application to Jovian atmospheric photochemistry
作者:J. P. Ferris、Alain Bossard、Haider Khwaja
DOI:10.1021/ja00314a011
日期:1984.1
chemical properties and the absence of P-H stretching bands in its infrared spectrum. The reaction pathway was not changed by lowering the PH3 partial pressure from 90 to 11 torr or by performing the photolysis in a 70-fold excess of H2. The initial quantum yields at 11 torr of PH3 are phi P2H4 = 0.04 +/- 0.02 and phi H2 = 0.74 +/- 0.08. The initial rate of P2H4 formation was not affected by lowering the
superconducting transition temperature Tc up to 203 GPa by using highpressure resistance measurements. However, the structural information of PH3 under highpressure remains elusive. Motivated by this, in this work, the behavior of PH3 under highpressure has been investigated by Raman spectroscopy at 298 K. The Raman spectra varied with pressure increasing, accompanying with the change of the sample color
The first hydrides of a phosphorus sulfide cage: nuclear magnetic resonance evidence for α-tetraphosphorus trisulfide hydride compounds
作者:Bruce W. Tattershall、Nigel L. Kendall
DOI:10.1039/dt9930003163
日期:——
The hydrides α-P4S4(H)R (R = H, I, NMePh or SPh) have been prepared in solution by the reaction of α-P4S3I2 or of the corresponding α-P4S3(I)R with SnBun3H, and identified by 31P NMR spectroscopy. The compounds were unstable and not isolated. Ab initio molecular orbital calculations of geometry have been carried out for α-P4S3H2, α-P4S3(NMe2)2 and α-P4S3H(NMe2).
氢化物α-P 4小号4(H)R(R = H,I,NMePh或SPH)已经通过的反应在溶液中制备α-P 4小号3我2或相应的α-P 4小号3(I)R含SnBu n 3 H,并通过31 P NMR光谱鉴定。这些化合物不稳定且未分离。从头几何的分子轨道计算已经进行了对α-P 4小号3 ħ 2,α-P 4小号3(NME 2)2和α-P4 S 3 H(NMe 2)。
Hydrogen Polyphosphides P<sub>3</sub>H<sub>2</sub><sup>3−</sup>and P<sub>3</sub>H<sub>3</sub><sup>2−</sup>: Synthesis and Crystal Structure of K<sub>3</sub>(P<sub>3</sub>H<sub>2</sub>)·2.3NH<sub>3</sub>, Rb<sub>3</sub>(P<sub>3</sub>H<sub>2</sub>)·NH<sub>3</sub>, [Rb(18-crown-6)]<sub>2</sub>(P<sub>3</sub>H<sub>3</sub>)·7.5NH<sub>3</sub>, and [Cs(18-crown-6)]<sub>2</sub>(P<sub>3</sub>H<sub>3</sub>)·7NH<sub>3</sub>
作者:Florian Kraus、Jürgen C. Aschenbrenner、T. Klamroth、Nikolaus Korber
DOI:10.1021/ic8014546
日期:2009.3.2
The incongruous solvation of polyphosphides and phosphanes or the direct reduction of whitephosphorus in liquid ammonia leads to the hydrogen polyphosphides catena-dihydrogen triphosphide, P3H23−, and catena-trihydrogen triphosphide, P3H32−, in the crystalline compounds K3(P3H2)·2.3NH3 (1), Rb3(P3H2)·NH3 (2), [Rb(18-crown-6)]2(P3H3)·7.5NH3 (3), and [Cs(18-crown-6)]2(P3H3)·7NH3 (4).
polyphosphides和膦的不协调溶剂化或在液氨通向氢polyphosphides直接还原白磷的系列-dihydrogen triphosphide,P 3 ħ 2 3-,和连锁-trihydrogen triphosphide,P 3 ħ 3 2-,在结晶化合物K 3(P 3 H 2)·2.3NH 3(1),Rb 3(P 3 H 2)·NH 3(2),[Rb(18-crown-6)] 2(P 3 H 3)· 7.5NH 3(3)和[Cs(18-crown-6)] 2(P 3 H 3)·7NH 3(4)。
Asymmetric diphosphines, their preparation and their use
申请人:Rhone-Poulenc S.A.
公开号:US03949000A1
公开(公告)日:1976-04-06
Optically active diphosphines of the formula: ##EQU1## in which the phosphinomethyl groups are trans to each other, form rhodium complexes useful as catalysts in hydrogenating substituted acrylic acids and their esters to optically active propionic acid derivatives.