The Insertion of Terminal Phosphinidene Complexes into the BH Bond of Amine and Phosphine Boranes
作者:Rongqiang Tian、François Mathey
DOI:10.1002/chem.201202277
日期:2012.9.3
Push–pull complexation: Transient terminal phosphinidene complexes [RPW(CO)5] insert at 110 °C into the BH bonds of LBH3 (L = Et3N, Ph3P; see scheme). The reaction is probably driven by an interaction between the nucleophilic boron and the electrophilic phosphorus.
Selective Dimerization of Lewis-Acid/Base-Stabilized Phosphanylalanes
作者:Michael Bodensteiner、Alexey Y. Timoshkin、Eugenia V. Peresypkina、Ulf Vogel、Manfred Scheer
DOI:10.1002/chem.201203074
日期:2013.1.14
The reaction of [(CO)5W}PRH2] (R=H, Ph) with H3Al⋅NR3 (R=Et, Me) leads to the formation of four‐membered heterocyclic compounds [((CO)5W}P(H)AlH⋅ NEt3)2] and [((CO)5W}PhPAlH⋅ NMe3)2]. Upon dissolving the solid compounds, fast equilibria between the isomers are observed on the NMR timescale. Further insight into the stability and reactivity of the isomers was gained by applying theoretical methods
Reaction of Terminal Phosphinidene Complexes with Dihydrogen
作者:Matthew P. Duffy、Liow Yu Ting、Leo Nicholls、Yongxin Li、Rakesh Ganguly、François Mathey
DOI:10.1021/om2009974
日期:2012.4.9
The reaction of H2 with [RP-W(CO)5] (R = Ph, Me) above 120 °C leads, first, to the secondary diphosphine complex (RPH-PHR)(W(CO)5)2 and then to the primary phosphine complex (RPH2)(W(CO)5). On the basis of DFT calculations, the mechanism most likely involves the addition of H2 to the P–W bond, followed by the formation of the radical [RPH-W(CO)5]• by homolysis of the W–H bond. In the case of [PhNHP-W(CO)5]
Insertion of phosphinidene complexes into the P–H bond of secondary phosphine oxides: a new version of the phospha-Wittig synthesis of PC double bonds
Terminalphosphinidenecomplexes [RP-W(CO)5], as generated at 60 °C in the presence of copper chloride from the appropriate 7-phosphanorbornadiene complexes, react with secondary phosphine oxides Ar2P(O)H to give the insertion products into the P–H bonds. After metalation with NaH, these products react with aldehydes to give the corresponding phosphaalkenes which are trapped by dimethylbutadiene.
Phosphepines: Convenient Access to Phosphinidene Complexes
作者:Mark L. G. Borst、Rosa E. Bulo、Christiaan W. Winkel、Danièle J. Gibney、Andreas W. Ehlers、Marius Schakel、Martin Lutz、Anthony L. Spek、Koop Lammertsma
DOI:10.1021/ja050817y
日期:2005.4.1
o-diethynylbenzene with transition metal-complexed primary phosphines gives in a single base-induced step stable phosphepine complexes as confirmed by X-ray data. At 75-80 degrees C these phosphepines undergo clean cheletropic elimination of naphthalene to give transient carbene-like phosphinidene complexes that can be trapped in high yield by alkenes, alkynes, and alcohols.
X 射线数据证实,邻二乙炔苯与过渡金属络合的伯膦反应在单一的碱诱导步骤中得到稳定的膦配合物。在 75-80 摄氏度时,这些磷化氢会经历萘的清洁螯合消除,以产生瞬态的卡宾状磷化烯配合物,这些配合物可以被烯烃、炔烃和醇以高产率捕获。