Showing papers in "Journal of Molecular Catalysis in 1977"

TL;DR: In this paper, the IR-study of polymerization catalysts obtained by the interaction of tetrakisπ-π-allylzirconium with silica was conducted and it was concluded that when treating these catalysts with hydrogen, surface zirconia hydrides are formed.

TL;DR: A new bifunctional catalyst of cobalt-phthalocyanine (CoPc) has been developed in which an efficient cooperation between oxidation catalyst and basic sites has been attained.

TL;DR: In this paper, a two-stage mechanism was proposed, which involves activation of the molybdenum hexacarbonyle by the alkyne and subsequent catalysis by the phenol.

TL;DR: In this article, the influence of typical aliphatic phosphines and of P-substituted phospholanes on the bishydroformylation of butadiene-1,3 is reported.

TL;DR: In this paper, selectively permeable polyimide membranes have been used to separate soluble transition metal complexes from reaction mixtures by reverse osmosis, and the results were obtained for cobalt and rhodium complexes from hydroformylation products of 1-pentene and of a palladium carboalkoxylation catalyst from ethyl hexanoate.

TL;DR: In this paper, a bifunctional polymer was designed for catalysis of the methanol carbonylation reaction, which is a lightly crosslinked polystyrene containing attached rhodium complexes and also containing attached groups analogous to pentachlorothiophenol.

TL;DR: The structures and the catalytic activity of rhodium(I) complexes with di- or triphosphines, or with tertiary phosphine anchorsites on polymers, have been studied in this article.

TL;DR: In this paper, an etude de la carbonylation du methanol en acide acetique en presence d'un compose de l'iridium and d'iodure de methyle is presented.

TL;DR: In this article, ligand-stabilized palladium(II) chloride complexes exemplified by ((p-CH3·C6H4)3P)2PdCl2SnCl2) have been found to catalyze the regioselective carbonylation of 1-alkynes.

TL;DR: In this paper, the properties of new Mo(V) complexes with ligands such as ethylene glycol, lactic acid and amygdalic acid in homogeneous systems, as well as properties of the heterogenized catalysts obtained in the ionic exchange reaction of the complex Na2[Mo2O4(OX)2(H2O)2]·3H 2O with Castel A-500p, Dowex 1X8, and Wofatit AD-41 anionites, were examined.

TL;DR: The formation of metallic rhodium by a prolonged hydrogen treatment of a number of supported complexes, derived from Rh2Cl2(CO)4 and some phosphine silicas, has been demonstrated by infrared, catalytic, reactivity and electron microscopy data as discussed by the authors.

TL;DR: In this paper, the effect of ligand phosphine to metal ratio on catalyst hydrosilylation efficiency has been studied and data on initial activity of regenerated and re-used catalysts are presented.

TL;DR: In this paper, a hybrid metathesis catalysts for polystyrene supports was presented, where Mo(φ3P)2(NO2)Cl2 was attached through a phosphine link and activated with methylaluminium sesquichloride.

TL;DR: In this article, the concept of dynamic vacant sites is introduced in catalysis and an attempt to correlate these observations with the scrambling of CO groups is made and the concept is introduced.

TL;DR: In this paper, the product distribution of C5, C6 and C7 alkene isomers in the presence of aqueous solutions of PdII salts has been determined by an extractive method and GLC analysis.

TL;DR: In this article, a contrast feature was found for the catalytic oxidation of ethyIene by palladium(II) in aqueous and acetic acid solutions, suggesting that the redox-decomposition for the yielding of vinyl acetate is preceded by an equilibrium process between the 2-and 1-acetoxyethylpalladium σ-complexes without any intermolecular hydrogen exchange.

TL;DR: In this article, the coordination of ruthenium(II) and rhodium(I) with linear polymeric ligands has been investigated and the coordination sphere of the metal in the complexed monomeric units has been determined by IR and mass spectra.

TL;DR: In this article, the concept of localized atomic excitation, electronic to lattice (phonon) vibrational energy transfer, matrix cage softening, and short-range bulk diffusion was employed to rationalize the experimental observation of photo-induced bulk diffusion and aggregation of Cr and Mo atoms to small metallic and bimetallic clusters.

TL;DR: The Cramer complex was fixed onto 3 polystyrene resins previously chloromethylated and phosphinated as mentioned in this paper, and the changes that are observed after ageing under hydrogen are related to the formation of metallic particles active for benzene hydrogenation.

TL;DR: In this article, it was shown that the catalytic centre of cyclotrimerization results from the exchange of arene ligand for butadiene in the complex's covalent form.

TL;DR: In this article, the synthesis of triphenylphosphine zerovalent complexes of palladium and platinum by reduction in mild conditions of cis -(PPh 3 ) 2 MCl 2 (M  Pd, Pt) with alkaline alkoxides has been investigated.

TL;DR: The organometallic complex Rh(π-C 3 H 5 )CO(PPh 3 ) 2 adsorbed on γ-alumina has been found an effective catalyst for gas-phase hydrogenation and hydroformylation of ethylene and propylene at atmospheric pressures and 60 − 90 °C.

TL;DR: In this paper, the effect of the substrates concentration, and the role of the uncoordinated polyphosphine in cyclohexene hydrogenation has been studied, in some cases, the probable formation of appreciable amounts of rhodium metal.

TL;DR: In this paper, the influence of water on the catalytic activity of binuclear copper complexes was studied at 44 °C in a mixture of 1,2-dichlorobenzene and methanol.