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Showing 1 to 13 of 13 for “"Diphosphines"”.
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Reversible binding of dihydrogen to dinuclear ruthenium complexes containing chelating diphosphines
The preparation of dinuclear mixed-valence ruthenium complexes of general formula Ru₂Cl₅(P-P)₂, previously reported for a range of chelating ditertiary phosphines including chiral systems, has been extended to include compounds of the diphosphine 1,4-bis(dicyclohexylphosphino)butane (P-P = DCYPB). …
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Carbon dioxide utilization : from fundamental reactivity to catalysis using transition metals supported by macrocyclic diphosphines
… investigated. A family of cis-macrocyclic diphosphines was prepared in just three steps from white phosphorus and commercial materials using a modular synthetic approach. Alkylation of bicyclic diphosphane P₂dmb₂ produced phosphino-phosphonium salts [RP₂dmb₂]X, where R is methyl, benzyl, …
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Synthesis and Coordination Chemistry of Novel Water Soluble Diphosphines: Application to Ruthenium Catalyzed Aqueous Nitrile Hydration
… used. Both phosphite and bicyclic diamino PTA diphosphines were water soluble.
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Optically active [(eta 6 -arene)Cr(CO) 3]-based diphosphines : synthesis and application in asymmetric homogeneous hydrogenation
Chiral diphosphines have become an important class of ligands for asymmetric catalysis. It is the success itself of enantioselective catalysis that has enhanced the demand for new chiral ligands for essentially two reasons. The first one is that no class of ligands can be considered universal …
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Preparative and N.M.R. studies of polyphosphorus ligands and their complexes
A wide range of diphosphines and their complexes with chromium, molybdenum, and tungsten carbonyl moieties has been synthesised and characterised, arid studied by proton, C-13 and P-31 n.m.r. spectroscopy. In many cases the diphosphines have one or more centres of chirality, and this leads to the …
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Rhodium-katalysierte, asymmetrische Synthese: Ligandendesign und Methodik
… deals with the synthesis of novel, enantiopure diphosphines and phosphine-olefin-complexes bearing a cyrhetrene backbone, which catalyze various reactions, e.g. the Hayashi-Miyaura-reaction and the hydrogenation of arylenamides, with high selectivities. On the other hand the first asymmetric …
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Investigation of phosphines as potential host materials in blue dye-doped organic light emitting devices
… (P-STIL) suggested that tertiary aromatic diphosphines (TAPs) may be suitable candidates. Therefore, the P-containing materials, 4,4'-bis(naphthylphenylphosphino)biphenyl (alpha-P-NPD) and 4,4'-bis(diphenylphosphino)biphenyl (P-DDB) were synthesized and the photophysical properties were …
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Niobium-mediated generation of P-P multiply bonded intermediates
… to organic dienes to yield polycyclic diphosphines, and also to terminal phosphide complexes of the general formula P????M(N[R]Ar)3 to yield cyclo-P3 complexes. Coordination of W(CO)5 to 1 accelerates conversion to 2, with loss of the (P2)W(CO)5 fragment, such that this reaction occurs …
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Studies of the Coordination Chemistry and Catalytic Activity of Rhodium and Ruthenium N-Heterocyclic Carbene Complexes
… of ketones versus alkenes. Use of chiral diphosphines and 1-triphenylmethylbenzimidazole yielded catalysts capable of producing secondary alcohols with moderate enantioselectivity.
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Alkane Elimination Reactions between Transition Metal Hydrides and Rare-Earth Alkyls
… properties of the parent compound. Fluorinated diphosphines serve as bidentate CO analogues. Primarily the readily available bidentate (perfluoroalkyl)phosphine dfmpf was chosen. The hydride complexes [HRu(dfmpf)Cp] and [HCo(dfmpf)(CO)2] were prepared. Preliminary reactivity studies showed …