Publication

Water-soluble (eta(6)-arene)ruthenium(II)-phosphine complexes and their catalytic activity in the hydrogenation of bicarbonate in aqueous solution

Gabor Laurenczy
2004
Journal Articles

Abstract

The reactions of (eta(6)-C6H6)RuCl2 and (eta(6)-p-cymene)RuCl2 With hydrogen in the presence of the water-soluble phosphines tppts (meta-trisulfonated triphenylphosphine) and pta (1,3,5-triaza-7-phosphaadamantane) afforded as the main species (eta(6)- C6H6)RuH(tppts)(2), (eta(6)-C6H6)RuH(pta)(2), (eta(6)-p-cymene)RuH(tppts)(2) and (eta(6)-p-cymene)RuH(pta)(2). This latter complex was also formed in the reaction of [(eta(6)-p-cymene)RuCl2(pta)] and hydrogen with a redistribution of pta. In addition, prolonged hydrogenation at elevated temperatures and in the presence of excess of pta led to the formation of the arene-free [RuH(pta)(4)CI], RuH(pta)(4)(H2O), [RuH2(pta)(4)] and RuH(pta)(5) complexes. Ru-hydrides, such as (eta6-arene)RuH(L)(2), catalyzed the hydrogenation of bicarbonate to formate in aqueous solutions at p(H-2) = 100 bar, T = 50-70 degreesC. (C) 2004 Elsevier B.V. All rights reserved.

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https://infoscience.epfl.ch/entities/publication/55368520-0583-4a61-a4bd-01c49349881e

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Gabor Laurenczy
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/55368520-0583-4a61-a4bd-01c49349881e

About this result

Related concepts (27)

Hydrogenation

Hydrogenation is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum. The process is commonly employed to reduce or saturate organic compounds. Hydrogenation typically constitutes the addition of pairs of hydrogen atoms to a molecule, often an alkene. Catalysts are required for the reaction to be usable; non-catalytic hydrogenation takes place only at very high temperatures.

Metal-phosphine complex

A metal-phosphine complex is a coordination complex containing one or more phosphine ligands. Almost always, the phosphine is an organophosphine of the type R3P (R = alkyl, aryl). Metal phosphine complexes are useful in homogeneous catalysis. Prominent examples of metal phosphine complexes include Wilkinson's catalyst (Rh(PPh3)3Cl), Grubbs' catalyst, and tetrakis(triphenylphosphine)palladium(0). Many metal phosphine complexes are prepared by reactions of metal halides with preformed phosphines.

Transfer hydrogenation

In chemistry, transfer hydrogenation is a chemical reaction involving the addition of hydrogen to a compound from a source other than molecular . It is applied in laboratory and industrial organic synthesis to saturate organic compounds and reduce ketones to alcohols, and imines to amines. It avoids the need for high-pressure molecular used in conventional hydrogenation. Transfer hydrogenation usually occurs at mild temperature and pressure conditions using organic or organometallic catalysts, many of which are chiral, allowing efficient asymmetric synthesis.

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