Intermolecular Alkene Aziridination: An Original and Efficient Cu<sup>I</sup>···Cu<sup>I</sup>Dinuclear Catalyst Deriving from a Phospha-Amidinate Ligand
Mononuclear and dinuclear CuI complexes 1 and 2 derivedfrom the phospha-amidinateligands [tBu2P(NSiMe3)2]– and [Ph2P(NSiMe3)2]–, respectively, have been evaluated in the catalytic aziridination of olefins using PhI=NTs (Ts = p-tolylsulfonyl) as the nitrene source. Dinuclear complex 2 featuring bridging NPN ligands and weak Cu···Cu interactions proved to be a robust and efficientcatalyst. Aziridines could
Synthesis and Structural Characterization of Aluminum Iminophosphonamide Complexes
作者:Bijan Nekoueishahraki、Herbert W. Roesky、Gerald Schwab、Daniel Stern、Dietmar Stalke
DOI:10.1021/ic9011179
日期:2009.10.5
Monoanionic iminophosphonamide ligands have a N−P−N linkage and undergo four-membered ring N,N-ligand formation when treated with aluminum compounds. The reaction of LLi (L = [Ph2P(NSiMe3)2]) with equivalent amounts of AlCl3 and AlMeCl2 in toluene afforded LAlCl2 (3) and LAlClMe (4), respectively. L2AlH (5), LAlEt2 (6), and LAl(NMe2)2 (7) respectively were prepared by the reaction of LH with AlH3·NMe3
Diiminophosphinate des Lithiums, Samariums und Ytterbiums: Moleku¨lstrukturen von Li[Ph2P(NSiMe3)2](THF)2 und [Ph2P(NSiMe3)2]2Sm(μ-I)2Li(THF)2
作者:Anja Recknagel、Alexander Steiner、Mathias Noltemeyer、Sally Brooker、Dietmar Stalke、Frank T. Edelmann
DOI:10.1016/0022-328x(91)86331-j
日期:1991.8
structure of Li[Ph2P(NSiMe3)2](THF)2 (2) has been determined by an X-ray diffraction study. A four-membered LiNPN ring forms the central unit of the monomeric molecule. YbI2 reacts with two equivalents of Li[Ph2P(NSiMe3)2] (1) to give the novel ytterbium(II)diiminophosphinate [Ph2P(NSiMe3)2]2Yb(THF)2 (3). A similar reaction of 1 with SmI2 affords the samarium(III) derivative [Ph2P(NSiMe3)2]2Sm(μ-I)2Li(THF)2
Gao, Xiaoliang; Doxsee, D. D.; Parvez, M., Phosphorus, Sulfur and Silicon and the Related Elements, 1994, vol. 94, # 1-4, p. 433 - 434
作者:Gao, Xiaoliang、Doxsee, D. D.、Parvez, M.、Chivers, Tristram
DOI:——
日期:——
Cyclooctatetraenyl complexes of the early transition metals and lanthanides
作者:Ulrike Reißmann、Peter Poremba、Mathias Noltemeyer、Hans-Georg Schmidt、Frank T. Edelmann
DOI:10.1016/s0020-1693(99)00524-1
日期:2000.5
The crystal structure of [(COT)Ce(mu-O3SCF3)(THF)(2)](2) (1) (COT = eta(8)-C8H8) has been determined by X-ray diffraction. The compound crystallizes in the triclinic space group P (1) over bar (a = 930.7(4), b = 1274.3(7), c = 1864.1(10) pm; alpha = 97.68(6), beta = 101.01(2), gamma = 105.25(1)degrees; Z = 2). Together with the bridging triflate ligands the cerium atoms form an eight-membered Ce2O4S2 ring. Treatment of 1 with 2 equiv. of K[1,3-'Bu2C5H3] affords the mixed-sandwich complex (COT)Ce(eta(5)-1,3-'Bu2C5H3) (2) in 78% yield. Furthermore. the preparation of a series of new lanthanide half-sandwich complexes containing the 1,4-bis(trimethylsilyl)-cyclooctatetraenyl ligand (= COT") and additional heteroallylic, aryloxide, and alkyl ligands is reported. (C) 2000 Elsevier Science S.A. All rights reserved.