A method for the synthesis of phosphabenzenes under iron catalysis is described. Thus, the FeI2‐catalyzed [2+2+2] cycloaddition of diynes with phosphaalkynes in m‐xylene gave a variety of phosphabenzenes in good to high yields (up to 87 % yield).
Photocontrolled Living Anionic Polymerization of Phosphorus-Bridged [1]Ferrocenophanes: A Route to Well-Defined Polyferrocenylphosphine (PFP) Homopolymers and Block Copolymers
作者:Sanjib K. Patra、George R. Whittell、Simone Nagiah、Cheuk-Lam Ho、Wai-Yeung Wong、Ian Manners
DOI:10.1002/chem.200902886
日期:2010.3.8
Phosphorus‐bridged strained [1]ferrocenophanes [Fe(η‐C5H4)2P(CH2CMe3)}] (2) and [Fe(η‐C5H4)2P(CH2SiMe3)}] (3) with neopentyl and (trimethylsilyl)methyl substituents on phosphorus, respectively, have been synthesized and characterized. Photocontrolled living anionic ring‐openingpolymerization (ROP) of the known phosphorus‐bridged [1]ferrocenophane [Fe(η‐C5H4)2P(CMe3)}] (1) and the new monomers 2 and
磷桥连应变[1] ferrocenophanes的[Fe (η-C 5 H ^ 4)2 P(CH 2 CME 3)}](2)和[铁(η-C 5 H ^ 4)2 P(CH 2森达(3)}](3)分别在磷上具有新戊基和(三甲基甲硅烷基)甲基取代基。已知的Photocontrolled活性阴离子开环聚合(ROP)磷桥联[1]二茂铁基的[Fe (η-C 5 H ^ 4)2 P(CME 3)}](1)和新的单体2和3,被Na发起[C 5 H ^ 5 ]在THF中在5℃,得到良好限定的polyferrocenylphosphines(的PFP),[铁(η-C 5 H ^ 4)2 PR}] Ñ(R = CME 3(4),CH 2 CMe 3(5)和CH 2 SiMe 3(6)),具有可控制的分子量(最大约60×10 3 Da)和窄的分子量分布。PFP 4 – 6通过多核NMR光谱,DSC以及通
作者:Charlotte E. Averre、Martyn P. Coles、Ian R. Crossley、Iain J. Day
DOI:10.1039/c1dt11499a
日期:——
The triphosphanes RMe2SiCH2P(PRâ²2)2 (R = Me, Ph; Râ² = SiMe3, Cy) are synthesised in good yield viametathesis of organodichlorophosphanes and LiPRâ²2, while for Râ² = Ph a propensity to form (Ph2P)2 precludes isolation of the in situ characterised triphosphanes. Where R = Me and Râ² = SiMe3 the triphosphane has also been characterised by single crystal X-ray diffraction and exhibits a single geometric conformer in the solid state, though solution-phase NMR spectra are indicative of facile conformational exchange across a wide temperature range. All of the described triphosphanes exhibit comparable behaviour, with their respective 31P1H} NMR spectra manifesting anomalous âsecond-orderâ characteristics, which are considered using full spin-Hamiltonian simulation. Preliminary studies of coordination chemistry and ancillary reactivity of the triphosphanes are described.
RMe2SiCH2P(PRâ²2)2(R=Me,Ph;Râ²=SiMe3,Cy)是由有机二氯膦和 LiPRâ²2 二甲氧基化合成的,产量很高,而 Râ²=Ph 时,形成 (Ph2P)2 的倾向排除了原位分离三膦的可能性。在 R = Me 和 Râ² = SiMe3 的情况下,三膦烷也通过单晶 X 射线衍射进行了表征,并在固态下显示出单一的几何构象,但溶液相核磁共振光谱表明,在很宽的温度范围内,构象易发生交换。所有描述的三膦化合物都表现出相似的行为,它们各自的 31P1H} NMR 光谱都表现出反常的变化。NMR 光谱显示出反常的 "二阶 "特征,我们利用全自旋-哈密顿模拟对其进行了研究。报告还介绍了对三膦酸配位化学和辅助反应性的初步研究。
Ambiphilic Reactivity of a Ruthenaphosphaalkenyl: Synthesis of <i>P</i>-Pyrazolylphosphaalkene Complexes of Ruthenium(0)
作者:Nicola Trathen、Victoria K. Greenacre、Ian R. Crossley、S. Mark Roe
DOI:10.1021/om4001988
日期:2013.5.13
novel ruthenaphosphaalkenyl complex [RuP═CH(SiMe3)}Cl(CO)(PPh3)2], prepared from [RuHCl(CO)(PPh3)3] and Me3SiC≡P, exhibits ambiphilic behavior, reacting at phosphorus with both nucleophiles and electrophiles. Its reaction with Li(pz′) or K[HB(pz′)3] (pz′ = pz, pz*) affords [Ruη1-N:η2-P,C-P(pz′)═CH(SiMe3)}(CO)(PPh3)2], a rare example of a ruthenium(0) η2-phosphaalkene complex and the first example of
Facile preparation of trimethylsilylphosphaalkyne and its conversion to polyphospholide anions
作者:Stephen M. Mansell、Michael Green、Richard J. Kilby、Martin Murray、Christopher A. Russell
DOI:10.1016/j.crci.2010.03.031
日期:2010.8
Résumé Me3SiCP may be prepared by dehydrochlorination of Me3SiCH2PCl2 at room temperature in aromatic solvents using DABCO in the presence of AgOTf. Reaction of Me3SiCP with a selection of s-block metals, s-block metal salts and ytterbium effects conversion to a mixture of di- and triphospholide anions. This mixture of anions was subsequently reacted with FeCl2 to yield a mixture of tetra-, penta- and hexaphosphaferrocenes.