Heterogeneous, platinum-catalyzed hydrogenation of (diolefin)dialkylplatinum(II) complexes: kinetics was written by Miller, Timothy M.;Izumi, Alan N.;Shih, Yen Shiang;Whitesides, George M.. And the article was included in Journal of the American Chemical Society in 1988.Reference of 12083-92-0 This article mentions the following:
(Diolefin)dialkylplatinum(II) complexes [(Ol2)PtR2] are rapidly reduced by H2 in the presence of Pt black catalyst: the organic groups are converted to alkanes, and the Pt(II) to Pt(0). This Pt(0) is incorporated into the surface of the Pt black catalyst. The reaction is a heterogeneous process catalyzed by Pt(0). Its rate is strongly influenced by mass transport and by the surface area of the catalyst. It is poisoned by dineopentylmercury, dioctyl sulfide, and tri-tert-butylphosphines. Because the catalyst surface is constantly renewed by deposition of Pt, the reaction is less sensitive to poisoning than more familiar Pt-catalyzed reactions such as hydrogenation of olefins. The form of the kinetic rate law observed for reduction of (1,5-cyclooctadiene)dimethylplatinum(II) depends on the reaction conditions. Two limiting kinetic regimes are observed In one, mass transport of H2 to the catalyst surface is rate-limiting; in the second, a reaction occurring on the Pt surface is rate-limiting. The activation energy for reaction in the mass transport limited regime is ∼3 kcal/mol and that in the reaction rate limited regime is ∼15 kcal/mol. In neither regime is there a kinetic isotope effect: νH2/νD2 = 1.0. Examination of the relative rates of reaction of a series of (diolefin)dialkyl + platinum(II) complexes indicates that the structure of the diolefin has a greater influence on the rate of reaction than does that of the alkyl group. Competitive experiments show that rates are influenced by adsorption of the (Ol2)PtR2 complex to the catalyst. These studies suggest that the Pt-catalyzed reaction of (Ol2)PtR2 with H2 takes place by a mechanism analogous to that of the Pt-catalyzed heterogeneous hydrogenation of olefins. The Pt atom originally present in the soluble complex is incorporated into the surface of the Pt catalyst and becomes the reactive site for a subsequent cycle of chemisorption and reaction. The reaction of (Ol2)PtR2 complexes with H2 thus provides a new method for generating Pt-surface alkyls under conditions representative of those used in heterogeneous Pt-catalyzed processes. In the experiment, the researchers used many compounds, for example, Dichlorodi(cyclopenta-1,3-dien-1-yl)platinate(II) (cas: 12083-92-0Reference of 12083-92-0).
Dichlorodi(cyclopenta-1,3-dien-1-yl)platinate(II) (cas: 12083-92-0) belongs to organic chlorides. Chlorinated organic compounds are found in nearly every class of biomolecules and natural products including alkaloids, terpenes, amino acids, flavonoids, steroids, and fatty acids. Alkanes and aryl alkanes may be chlorinated under free radical conditions, with UV light. However, the extent of chlorination is difficult to control.Reference of 12083-92-0
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics