Use of Chelating Diphosphines To Prepare New Phosphido Clusters of Aluminum and Gallium
作者:David A. Atwood、Alan H. Cowley、Richard A. Jones、Ronald J. Powell、Christine M. Nunn
DOI:10.1021/om960122t
日期:1996.5.28
Novel phosphido cluster complexes of formula (Me(2)M)(4)(mu-(1,2-PR)(2)C6H4)(2) (M = Al, R = Me (1); M = Ga, R = t-Bu (2)) result when the chelating diphosphine ligand 1,2-bis(alkylphosphino)benzene is mixed with trialkylaluminum and -gallium reagents. When the potentially chelating ligand 1,2-bis(tert-butylphosphino)ethane is mixed with 2 equiv of AlMe(3) under the same conditions, the secondary phosphine bis-adduct complex Me(3)Al . PH(t-Bu)CH2CH2(t-Bu)HP . AlMe(3) (3) is formed.
Synthesis of a dinuclear, phosphido-bridged complex of rhenium, X-ray crystal structure of Re2 (μ-H) [μ-(t-Bu)PC6H4P(H)t-Bu](CO)7
作者:Mark D. Soucek、David R. Russell
DOI:10.1016/s0020-1693(97)06158-6
日期:1998.8
The thermal reaction of Re-2(CO)(10) and 1,2-[t-BuPH](2)C6H4 in xylene gives Re-2(mu-H)[mu-(t-BuP)C6H4(t-BuPH)] (CO)(7) (1) in 70% yield. The crystal structure of 1 has been determined. Compound 1 crystallized in the monoclinic space group P2(1)/n with Z = 4; a = 10.953(3), b = 13.271(4), c = 17.969(7) Angstrom; beta = 104.48(2)degrees. The final R and R-w were 0.037 and 0.036, respectively. (C) 1998 Elsevier Science S.A. All rights reserved.
Phosphine Coordination Complexes of the Diphenylphosphenium Cation: A Versatile Synthetic Methodology for P−P Bond Formation
作者:Neil Burford、Paul J. Ragogna、Robert McDonald、Michael J. Ferguson
DOI:10.1021/ja036649w
日期:2003.11.1
A series of phosphine-diphenylphosphenium donor-acceptor cationic complexes have been synthesized and comprehensively characterized (phosphine = diphenylchlorophosphine, triphenylphosphine, trimethylphosphine, and tricyclohexylphosphine). The complexes involve homoatomic P-P coordinate bonds that are susceptible to ligand exchange reactions highlighting a versatile new synthetic method for P-P bond formation. Phosphenium complexes of 1,2-bis(diphenylphosphino)benzene and 1,2-bis(tert-butylphos-phino)benzene undergo unusual rearrangements to give a "segregated" diphosphine-phosphonium cation and a cyclic di(phosphino)phosphonium cation, respectively. The rearrangement products reveal the kinetic stability of the phosphine-phosphenium bonding arrangement.
Linked bis(μ-phosphido) and related ligands for metallic clusters
作者:Evan P. Kyba、Michael C. Kerby、Ram P. Kashyap、Karen L. Hassett、Raymond E. Davis