Measurement of the Hydride Donor Abilities of [HM(diphosphine)2]+ Complexes (M = Ni, Pt) by Heterolytic Activation of Hydrogen
摘要:
[M(diphosphine)(2)](2+) complexes (where M = Ni and Pt) react with hydrogen in the presence of bases to form the corresponding hydrides, [HM(diphosphine)(2)](+). In seven cases, equilibria have been observed from which the hydride donor ability (DeltaGdegrees(H-)) of the hydrides can be calculated. For six of these complexes, the DeltaGdegrees(H-) values calculated using heterolytic activation of hydrogen are compared with those based on thermodynamic cycles using pK(a) measurements and electrochemical half-wave potentials. The agreement between these two methods is good (within 1 kcal/mol). The reactivity of the various [M(diphosphine)(2)](2+) complexes toward hydrogen parallels their measured hydride acceptor abilities.
The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, comprising these metal complexes.
这项发明涉及金属配合物以及包括这些金属配合物的电子设备,特别是有机电致发光器件。
A Comprehensive Mechanistic Picture of the Isomerizing Alkoxycarbonylation of Plant Oils
olefin substrates, but virtually no effect of the doublebond position within the substrate. Compared to higher olefins, ethylene carbonylation under identical conditions is much faster, likely due not just to the occurrence of reactive linear acyls exclusively but also to an intrinsically favorable insertion reactivity of the olefin. The alcoholysis reaction is slowed down for higher alcohols, evidenced
Catalytic activity of cationic diphospalladium(II) complexes in the alkene/CO copolymerization in organic solvents and water in dependence on the length of the alkyl chain at the phosphine ligands
作者:Ekkehard Lindner、Markus Schmid、Joachim Wald、Joachim A. Queisser、Michael Geprägs、Peter Wegner、Christiane Nachtigal
DOI:10.1016/s0022-328x(00)00154-6
日期:2000.5
analysis. In particular the water-soluble complexes 2c–k proved to be highly active in the carbonmonoxide/ethene copolymerization under biphasic conditions (water–toluene). In the presence of an emulsifier and methanol as activator the catalytic activity increased by a factor of about three. Also higher olefins could be successfully incorporated into the copolymerization with CO and the terpolymerization
一系列双膦配体CH 2(CH 2 PR 2)2(1a – x)(a – g:R =(CH 2)n OH,n = 1,3-8; h – k:R =(CH 2)n CH(CH 2 OH)2,n = 3–6;l – u:R = C n H 2 n +1,n = 1–8,10,14; v – x:R = CH(CH 3通过相应的1-烯烃的加氢磷酸化反应制备具有不同极性官能团的)2,(CH 2)2 CH(CH 3)2,(CH 2)3 CH(CH 3)2(方案1)。 H 2 P(CH 2)3 PH 2或格氏试剂与Cl 2 P(CH 2)3 PCl 2的反应。水溶性钯络合物[(R 2 P(CH 2)3 PR 2)Pd(OAc)2 ](2a - k)是通过Pd(OAc)2与配体1a - k在乙醇-乙腈中的反应获得的。用1l – x处理PdCl 2(NCC 6 H 5)2得到二氯钯(II)络合物[(R 2 P(CH
Alkyl and aryl dicationic derivatives of cyclic triphosphenium ions
作者:Keith B. Dillon、Andrés E. Goeta、Judith A. K. Howard、Philippa K. Monks、Helena J. Shepherd、Amber L. Thompson
DOI:10.1039/b716027e
日期:——
Direct alkylation of cyclictriphospheniumions by triflates to give di-ium dications is only possible for small organic substituents on the attacking reagent. The dicationic products are not intrinsically unstable, however, and in many instances they may be synthesised by an alternative route, pioneered by Schmidpeter and co-workers. These species may be readily identified in solution by (31)P NMR
Using Ligand Bite Angles To Control the Hydricity of Palladium Diphosphine Complexes
作者:James W. Raebiger、Alex Miedaner、Calvin J. Curtis、Susie M. Miller、Oren P. Anderson、Daniel L. DuBois
DOI:10.1021/ja0395240
日期:2004.5.1
and palladium increases by over 50 degrees as the natural biteangle increases for the [Pd(diphosphine)(2)](BF(4))(2) complexes. The dihedral angle for the Pd(diphosphine)(2) complexes varies less than 10 degrees for the same range of natural biteangles. Equilibrium reactions of the Pd(diphosphine)(2) complexes with protonated bases to form the corresponding [HPd(diphosphine)(2)](+) complexes were