Showing papers on "Palladium published in 1969"
297 citations
235 citations
164 citations
147 citations
130 citations
TL;DR: In this article, the interaction of confugated and cumulated dienes with π-allylic palladium complexes is described as part of palladium-catalysed synthesis of polyunsaturated carboxylic acid derivatives from a diene, an alcohol and carbon monoxide or from an allylic compound and carbon dioxide.
100 citations
73 citations
67 citations
67 citations
TL;DR: In this article, the complete oxidation of methane over palladium, platinum, rhodium and iridium has been studied using a microcalorimetric technique, which indicated that methane may be adsorbed on two types of reaction sites, one of which also adsorbs oxygen.
Abstract: The complete oxidation of methane over palladium, platinum, rhodium and iridium has been studied using a microcalorimetric technique. The results indicated that methane may be adsorbed on two types of reaction site, one of which also adsorbs oxygen. The activation energies are proportional to the Pauling bond energies of the oxygen-metal bond in the region where the order in oxygen is low.
65 citations
TL;DR: In this article, the 1:1(Cu), 1:2(Cu, Ni, Co), and 1:3(Ni, Co) complexes with dimepia ligand were obtained.
TL;DR: Substantial amounts of Ag, Al, Au, Bi, Ca, Co, Cr, Fe, Hg, K, La, Mg, Mn, Mo, Na, Ni, Pb, Te, Ti, V, Y, Zn, and the platinum metals do not interfere in the atomic-absorption determination.
TL;DR: In this article, the infrared spectra have been obtained from the surface species formed by initial adsorption, and subsequent hydrogenation, of acetylene on silica-supported nickel and platinum.
Patent•
14 Apr 1969
TL;DR: In this paper, an improved process for the catalytic, vapor phase production of vinyl acetate from ethylene, acetic acid and molecular oxygen is shown, where a catalyst for the synthesis reaction comprising metallic palladium and an alkali metal acetate or formate supported on an inert carrier is activated by including metallic gold therein.
Abstract: An improved process for the catalytic, vapor phase production of vinyl acetate from ethylene, acetic acid and molecular oxygen is shown. A catalyst for the synthesis reaction comprising metallic palladium and an alkali metal acetate or formate supported on an inert carrier is activated by including metallic gold therein. A preferred catalyst composition which shows substantially improved operating characteristics includes metallic palladium, an alkali metal acetate and metallic gold. Another preferred catalyst composition includes a low melting mixture of at least two alkali metal acetates.
TL;DR: In this paper, the π-olefinic palladium complex was found to be in equilibrium with small amounts of the α-allylic complex according to the following equation:
Abstract: π-Allylic palladium halide complexes, substituted by an alkyl or aryl group at the central carbon atom, can be obtained in high yields in a one-step synthesis by introducing the appropriate olefin into a sodium chloropalladite solution in glacial acetic acid in the presence of sodium acetate at 85°C.
The reaction has been found to proceed via the π-olefinic palladium complex, which is in equilibrium with small amounts of the π-allylic complex according to:
An equivalent amount of sodium acetate shifts the equilibrium completely to the right-hand side.
Specifically deuterated olefins can be obtained by dissolving the olefins in a solution of sodium chloropalladite in CH3COOD. Addition of sodium acetate after completion of the exchange affords the deuterated π-allyl complexes.
The scope of the reaction and the mechanism are discussed.
TL;DR: In this article, the thermodynamic properties of the solid solutions formed by palladium and platinum with iron, were investigated between 700 and 1000°C, using oxygen concentration cells with ThO2-YO1.5 and ZrO2CaO solid electrolytes.
Patent•
Esso1
TL;DR: In this article, the unsaturated alcohols and ethers are prepared through the reaction of C4 to C6 aliphatic conjugated diolefins with water, a lower alkanol or mixtures thereof in the presence of a zero valent palladium based catalyst system.
Abstract: Unsaturated alcohols and ethers are prepared through the reaction of C4 to C6 aliphatic conjugated diolefins with water, a lower alkanol or mixtures thereof in the presence of a zero valent palladium based catalyst system. The preferred catalyst is tetrakis(triphenyl-phosphine)palladium alone or in combination with a basic material such as a quaternary ammonium hydroxide. Where one of the coreactants is water, the reaction is conducted in the presence of a solvent. The unsaturated alcohol and ether products can be catalytically hydrogenated to plasticizer alcohols and ether solvent media.
TL;DR: In this article, two types of allylic complexes were studied, and halogen-bridged dimer complexes showed lower reactivity than acetylacetonato complexes when the allylic group or diene was varied.
TL;DR: In this article, the energy loss functions of Silver and Palladium were determined from energy loss experiments with 60 keV electrons and the influence of surface effects and multiple losses was discussed and the values of Im (−1/ǫ) were corrected for them.
Abstract: The energy loss functions Im (−1/ɛ) of Silver and Palladium are determined from energy loss experiments with 60 keV electrons. The influence of surface effects and multiple losses is discussed and the values of Im (−1/ɛ) are corrected for them. By means of Kramers-Kronig analysis the optical constantsɛ
1 andɛ
2 are calculated from the energy loss function and found to be in good agreement with data derived from optical experiments by various authors.
TL;DR: In this paper, the Proton Magnetic Resonance (PMR) spectra of tetracyano-l-propylenediamine cobalt(III) ion and bis(l-procyclediamine) platinum(II) and palladium (II) ion were measured in deuterated water and analyzed according to Castellano and Waugh's exact analysis.
Abstract: Proton magnetic resonance (PMR) spectra of tetracyano-l-propylenediamine cobalt(III) ion and bis(l-propylenediamine) platinum(II) and palladium(II) ion have been measured in deuterated water and analyzed according to Castellano and Waugh’s exact analysis. The values of coupling constants clearly indicate that the l-propylenediamine chelate rings in these diamagnetic complexes have fixed λ-gauche form in aqueous solutions at room temperature.
TL;DR: The reaction of palladium with copper diethyldithio-carbamate has been studied and two complexes isolated: palladium diethyllithiocarbamate and palladium chloride diethyldergetic chloride.