Showing papers in "Journal of Molecular Catalysis in 1987"

TL;DR: In this paper, the mechanism of phosphine-modified rhodium-catalyzed hydrofonnylation of 1-hexene was studied by in situ infrared spectroscopy using high pressure autoclaves equipped with embedded cylindrical internal reflectance crystals (CIR-FTIR).

TL;DR: In this article, β-migratory insertion and elimination processes for alkyl derivatives of permethylscandocene, (η 5 -C 5 Me 5 ) 2 Sc-R, have been investigated.

TL;DR: The surface properties of CuO prepared by thermal decomposition of Cu(OH)2·CuCO3 have been studied by FT-IR spectroscopy of CO, CO2, pyridine, pivalonitrile, methanol and formic acid adsorbed in the 200-420 K temperature range as discussed by the authors.

TL;DR: Pd(II) complexes with 1,10-phenanthroline (phen) derivatives of general formula Pd(chel)2][PF6]2 have high activity and selectivity in the catalytic synthesis of aromatic urethanes under relatively mild reaction conditions and without any added cocatalyst as mentioned in this paper.

TL;DR: In this paper, the authors extended the concept to elemental metal clusters in a fluid medium, by stabilizing colloidal transition metal particles in nonpolar hydrocarbon solutions using polymers as tenuous ligands to prevent aggregation of the metal.

TL;DR: Nickel compounds based upon phosphorus-oxygen chelate ligands, Ph2PCR=CRO−, are effective catalysts for the homopolymerization of ethylene to high molecular weight polyethylene.

TL;DR: The Friedel-Crafts acylation of aromatic compounds (benzene, toluene, xylene) with carboxylic acids (CH3(CH2)n COOH, n = 0−14) was performed over cation-exchanged montmorillonites (H+, Al3+, Ni2+, Zr4+, Ce3+, Cu2+, La3+).

TL;DR: In this paper, a mechanism involving association of the α-olefin substrate with the N- and P-ligated ruthenium carbonyl, or hydrogen transfer to form an alkyl-Ru intermediate, has been proposed as rate-determining steps under normal oxonation conditions.

TL;DR: In this article, the authors present a review of recent studies from these laboratories that concern activation of dihydrogen and of dioxygen by various ruthenium complexes in solution.

TL;DR: In this paper, the same rate and catalyst stability observed at high water concentrations can be obtained at much lower water concentrations with improved CO selectivity to acetic acid, which can provide significant savings in the commercial Acetic acid process.

TL;DR: Complexes of general formula [RhCpL2], (I) are excellent long-lived catalyst precursors for the synthesis of pyridine derivatives by cocyclization of alkynes and nitriles, at temperatures between 100 and 170 °C.

TL;DR: In this paper, four, two, or one L = PEt 3 ligands are selectively introduced into the coordination sphere of silica-supported Ni(I) ions, and the best results are observed with two PEt3 ligands: at a conversion of 23%, a selectivity of 95% for 1-butene is obtained.

TL;DR: In this article, allylic arsenites were used as the allylating agent in palladium catalyzed allylic alkylation under neutral conditions, and the reaction of allylic alcohols with a nucleophile catalyzed by Pd(PPh3)4 and arsenic(III) oxide.

TL;DR: In this article, the chemo-and regioselectivity of propylene catalysed by [NEt4][HRu3(CO)11] was studied as a function of solvent, temperature and pressure.

TL;DR: In this article, Dioxymethylene species have been characterized upon adsorption of formaldehyde on zinc aluminate and copper supported on zinc alumininate, by both FTIR spectroscopy and chemical trapping.

TL;DR: In this article, the authors examined the possibilities of catalytic dinitrogen reduction in protic media and showed that an optimum catalyst should be able to form a binuclear complex MNNM bound to a polynuclear cluster of reductant atoms capable of transferring electrons to the coordinated N 2 molecule.

TL;DR: A series of new syntheses of carboxy compounds derived from cobalt-catalyzed carbonylation of benzyl chloride and ethyl chloroacetate is shown in this paper.

TL;DR: In this article, it was shown that pentaand heptavalent rhenium centers (Re+ and Re++) act as the sites of olefin metathesis.

TL;DR: A water-soluble Wilkinson's complex, chlorotris(diphenylphosphinobenzene-m-sulphonate) rhodium(I) (RhICl(dpm)33−), was examined as a homogeneous catalyst for the reduction of water coupled with the photoreaction of Ru(bpy)32+ using ascorbic acid as a sacrificial electron donor.

TL;DR: In this paper, the transposition de Fries in presence of trois catalyseurs acides solides is studied, in the presence of orthogonal orthogonality.

TL;DR: In this article, the organophosphate 4-nitrophenyldiethylphosphate (4-NPDEP) simulant was deposited on a Nb-doped TiO 2 powder for subsequent photodecomposition.

TL;DR: In this article, it is suggested that at low concentration tin ions act as promoters by activating the oxygen-containing group, and at higher tin content, platinum is poisoned and availability of activated hydrogen becomes rate-determining.

TL;DR: In this paper, the authors investigated the catalytic properties of azo-and hydrazobenzenes in the presence of a metalaryl σ-bond for the reduction of nitroaromatics, alkenes, alkanes and aromatic groups.

TL;DR: In this article, the authors presented a method to construct an LPI-ARTICLE-1987-005, which is used in the Web of Science Record created on 2006-02-21.

TL;DR: In this paper, the effect of metal particle size on the enantioselective hydrogenation of methylacetoacetate (MAA) to methyl 3-hydroxybutyrate (mHB) in the gas and the liquid phases was studied over Ni/SiO2 modified with R,R tartaric acid.

TL;DR: In this paper, the cyclo-cotrimerization of alkynes and heterocumulenes (carbodiimides, isocyanates and carbon dioxide) in the presence of [Co(η5-C5H5)-(C2H4)2], (I) has been studied.

TL;DR: In this paper, the detailed kinetics of formate and acetate hydrogenolysis have been measured and the results correlated with predictions of Langmuir-Hinshelwood models.