- On the compatibility of Ruthenium metathesis catalysts with secondary phosphines
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While attempts to incorporate secondary phosphine ligands into the first-generation Grubbs catalyst RuCl2(PR3) 2(=CHPh) (GI, R = Cy) were frustrated by decomposition (for HPCy 2) or bulk (for HPtBusu
- Van Lierop, Bianca J.,Fogg, Deryn E.
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- Reactivity of Phosphanylphosphinidene Complex of Tungsten(VI) toward Phosphines: A New Method of Synthesis of catena-Polyphosphorus Ligands
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The reactivity of an anionic phosphanylphosphinidene complex of tungsten(VI), [(2,6-i-Pr2C6H3N)2(Cl)W(η2-t-Bu2P=P)]Li·3DME toward PMe3, halogenophosphines, and iodine was investigated. Reaction of the starting complex with Me3P led to formation of a new neutral phosphanylphosphinidene complex, [(2,6-i-Pr2C6H3N)2(Me3P)W(η2-t-Bu2P=P)]. Reactions with halogenophosphines yielded new catena-phosphorus complexes. From reaction with Ph2PCl and Ph2PBr, a complex with an anionic triphosphorus ligand t-Bu2P-P(-)-PPh2 was isolated. The main product of reaction with PhPCl2 was a tungsten(VI) complex with a pentaphosphorus ligand, t-Bu2P-P(-)-P(Ph)-P(-)-P-t-Bu2. Iodine reacted with the starting complex as an electrophile under splitting of the P-P bond in the t-Bu2P=P unit to yield [(1,2-η-t-Bu2P-P-P-t-Bu2)W(2,6-i-Pr2C6H3N)2Cl], t-Bu2PI, and phosphorus polymers. The molecular structures of the isolated products in the solid state and in solution were established by single crystal X-ray diffraction and NMR spectroscopy. (Chemical Equation Presented).
- Grubba, Rafa?,Ordyszewska, Anna,Kaniewska, Kinga,Ponikiewski, ?ukasz,Chojnacki, Jaros?aw,Gudat, Dietrich,Pikies, Jerzy
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p. 8380 - 8387
(2015/09/21)
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- Reactivity of diimido complexes of moybdenum and tungsten towards lithium derivatives of diphosphanes and triphosphanes
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The reaction of R2P-P(SiMe3)Li (R = tBu, iPr) with the diimido molybdenum complex [(ArN)2MoCl2·dme] (Ar = 2,6-iPr2C6H3; dme = 1,2-dimethoxyethane) yielded the side-on-coordinated
- Grubba, Rafa?,Wi?niewska, Aleksandra,Ponikiewski, ?ukasz,Caporali, Maria,Peruzzini, Maurizio,Pikies, Jerzy
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p. 1811 - 1817
(2014/04/17)
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- Reactivity of diimido complexes of moybdenum and tungsten towards lithium derivatives of diphosphanes and triphosphanes
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The reaction of R2P-P(SiMe3)Li (R = tBu, iPr) with the diimido molybdenum complex [(ArN)2MoCl2·dme] (Ar = 2,6-iPr2C6H3; dme = 1,2-dimethoxyethane) yielded the side-on-coordinated
- Grubba, Rafa?,Wis?niewska, Aleksandra,Ponikiewski, ?ukasz,Caporali, Maria,Peruzzini, Maurizio,Pikies, Jerzy
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p. 1811 - 1817
(2015/04/27)
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- Formation of polyphosphorus ligands mediated by zirconium and hafnium complexes
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The reactions of R2P-P(SiMe3)Li (R = tBu, iPr, iPr2N) with [Cp2MCl 2] (M = Zr, Hf), [Cp*z.ast;CpZrCl2] and [CpZrCl 3] yielded polyphosphorus (mainly hexaphosphorus) compounds which can be viewed as intermediates between R2P-P(SiMe3)Li and derivatives of 1,2,3,4-tetraphosphabicyclo[1.1.0] butane. Thus R 2P-P(SiMe3)Li can act as a building block for the formation of the P2 ligand and the R2P-P(P2) and R2P-P(P2)P-PR2 moieties. Solid state structures of zirconium(IV) and hafnium(IV) complexes with R2P- P(P2) and R2P-P(P2)P-PR2 ligands were established by X-ray studies.
- Wi?niewska, Aleksandra,?apczuk-Krygier, Agnieszka,Baranowska, Katarzyna,Chojnacki, Jaros?aw,Matern, Eberhard,Pikies, Jerzy,Grubba, Rafa?
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- Rhodium-catalyzed dehydrocoupling of the sterically encumbered phosphine-borane adduct tBu2PH·BH3: Synthesis of the linear dimers tBu2PH-BH2-tBu2P-BH3 and tBu2PH-BH2-t
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The dehydrocoupling of the sterically hindered phosphine-borane adduct tBu2PH·BH3 above 140 °C is catalyzed by the rhodium complexes [Rh(1,5-cod)2:][OTf] or Rh6(CO)16 to give the four-membered chain tBu2/s
- Dorn,Vejzovic,Lough,Manners
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p. 4327 - 4331
(2008/10/08)
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- Coordination Chemistry of P-Rich Phosphanes and Silylphosphanes. XXVI [1] Formation and Structure of [{cyclo-P4(P(t)Bu2)4}{Ni(CO)2}2]
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[{cyclo-P4(P(t)Bu2)4}{Ni(CO)2}2] is formed by reaction of the cyclotetraphosphane P4(P(t)Bu2)4 with [Ni(CO)4]. Each Ni(CO)2 unit is coordinated by two adjacent (t)Bu2P groups forming two five-membered P4Ni rings above and below the planar cyclotetraphosphane ring, respectively. The compound crystallizes in the triclinic space group P1- (No. 2) with a=893.29(5), b=1140.75(7), c=1235.52(8) pm, α=109.179(7), β=100.066(7), γ=97.595(7)° and Z=1.
- Krautscheid, Harald,Matern, Eberhard,Olkowska-Oetzel, Jolanta,Pikies, Jerzy,Fritz, Gerhard
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