Showing papers in "Journal of Molecular Catalysis in 1981"

TL;DR: In this paper, a binuclear imidazole-bridged copper and zinc-copper chromophores were synthesized and compared with the active site of Cu 2 Zn 2 -superoxide dismutase.

TL;DR: In this paper, the authors show that the dinuclear chromium surface complexes represent the majority of the chromium in dinuclear surface complexes, and propose a detailed model of the surface complexes.

TL;DR: In this paper, a two-liquid phase catalysis is described in which aqueous metal halides of Group VIII are used for the isomerization of water-insoluble allylic compounds.

TL;DR: In this paper, the behavior of the adsorbed carbonyl species towards O2, NO and H2 was discussed, the i.p. bands of which resembled those of the original carbonyls used.

TL;DR: The metal catalyzed epoxidation reaction of olefins with organic hydroperoxides appeared to be particularly important not only from an industrial point of view (Halcon process) but also because of its wide application in synthetic organic chemistry as discussed by the authors.

TL;DR: In this article, the effect of small variations in diphosphine configuration was studied with the objective of determining the effect on selectivity of 1-hexene hydroformylation to heptanal, catalyzed by complexes formed when diphines displace PPh3 from HRh(CO)(PPh3)3.

TL;DR: In this paper, a casein was used as a substrate of α-chymotrypsin and the enzyme activity was accelerated with ultrasonic irradiation (20 kHz, 10-15 W).

TL;DR: In this article, the adsorption of ethylene and its conversion to hydrocarbons on zeolite H-ZSM-5 as catalyst was investigated by 13C NMR.

TL;DR: In this article, the authors studied the first-order hydrogenation of alkenes by homogeneous rhodium(I) complexes at 1.1 atm hydrogen pressure and 37 − 67 °C.

TL;DR: In this paper, small metal particles in Y zeolite supercages can be prepared by the controlled thermal decomposition of binary metal carbonyls and their derivatives, and the presence of such aggregates is clearly demonstrated in the case of ruthenium.

TL;DR: In this article, metal oxide-supported rhodium hydride complexes were prepared in which the Rh is covalently anchored to the support through a R-oxygen bond, and the various complexes differ in their ligand environments and exhibit markedly different behavior as olefin hydrogenation catalysts.

TL;DR: In this article, the scope and mechanism of carboxylic acid homologation has been examined in relation to the structure of the acid substrate, the concentration, and composition of the ruthenium catalyst precursor and iodide promoter, syngas ratios, as well as 13C enrichment studies and the spectral identification of RUThenium iodocarbonyl intermediates.

TL;DR: In this paper, the selectivity of propene promoted by a [PdCl 2 (PPh 3 ) 2 ]−PPh3 catalyst precursor with high selectivity towards the branched isomer when a solvent is added to the alkanol was investigated.

TL;DR: A series of heterogenized catalysts has been prepared by the reaction of chlorobis(ethylene)rhodium(I) dimer and phosphinated silica as discussed by the authors.

TL;DR: In this article, the authors showed that increasing the δp value of the substituent raised the selectivity for 2-arylpropanal and the tendency was the opposite to that found in the absence of phosphines.

TL;DR: In this paper, the influence of the water to nitrile ratio and the addition at equal periods of the consumed reagents in the hydration of acetonitrile into acetamide catalyzed by the complex [PdCl(OH)(bipy)(H2O)].

TL;DR: In this article, the performance of the catalyst depends on the method of preparation and the methods of functionalization of the support with phosphine and phosphite ligands by means of chloromethylation and chlorophosphonation.

TL;DR: In this article, reaction models are presented to account for the observed behaviors of metal carbonyl compounds on aluminas, and a molybdenum intermediate which serves as an active olefin metahesis catalyst is proposed to be a Mo(IV) alkylidene species.

TL;DR: In this paper, it was shown that the cyclo-olefinic ligands, initially present in Ru(COT)(COD), are displaced by the phenyl rings of the polystyrene.

TL;DR: Efficient and stable recycling rates could be maintained continuously when used for 3 h and each column of microcapsules when reused several times during a two-week period still retained 40% of its original activity.

TL;DR: In this article, the first authentic hydroxymethyl metal compound (C5H5Re-(CO) (NO)(CH2OH) was synthesized by direct hydrolysis of a metallo ester.

TL;DR: In this paper, the authors studied the first-order oxidation of p-chlorophenylmethyl sulphide and a series of phenylsubstituted arylmethyl sulphides in the presence of catalytic amounts of three molybdenum derivatives, MoO2(acac)2, Mo(CO)6 and MoO5·HMPT·H2O.

TL;DR: In this article, the relative rates for the heterogenized [1-A], [ 1-B] and [ 1 -C] catalysts and for the ruthenium complex (1) in a homogeneous system were compared.

TL;DR: In this article, the FeCo 3 (CO − 12 anion promoted with methyl iodide has proven to be effective catalysts for the methanol homologation reaction.

TL;DR: In this paper, five ketones were hydrosilylated using either α-NpPhSiH2 or Ph2SiH 2, in the presence of rhodium catalysts which had been modified with the chiral phosphinite glucophinite or camphinite.

TL;DR: Bis(solvento)palladium(II) complexes are shown to have an unusually high ability to activate organic substrates, such as olefins and silanes as mentioned in this paper.

TL;DR: The concept that ligand-reagent interactions might be useful in asymmetric catalysis has been used in designing copper (II) catalysts bearing Schiff base ligands derived from naturally occurring sugars.

TL;DR: In this paper, the electronic structure of molybdenum carboxylate has been examined in the solid state, as well as in solution and on a carrier, before and after application in the catalytic reaction.