821-60-3Relevant academic research and scientific papers
Improvement of catalyst activity in the Ru-catalyzed dimerization of acrylonitrile by using diphenyl ether as a solvent
Kashiwagi, Kohichi,Sugise, Ryoji,Shimakawa, Toshihiro,Matuura, Tunao
, p. 1384 - 1385 (2008/03/18)
For the catalyst system of ruthenium and carboxylic acid, which is useful for the efficient tail-to-tail dimerization of acrylonitrile, the TON increases as the ruthenium catalyst concentration is decreased. Furthermore, the addition of aromatic solvents of equal volume to that of acrylonitrile improves the catalyst activity. Especially, the use of diphenyl ether leads to a 1.7 time improvement of the TON. Copyright
Linear relationship between activity of a new Ru-catalyst and acidity of substituted benzoic acids in the dimerization of acrylonitrile
Kashiwagi, Kohichi,Sugise, Ryoji,Shimakawa, Toshihiro,Matuura, Tunao,Shirai, Masashi
, p. 186 - 187 (2007/10/03)
A new type of catalyst system using ruthenium and carboxylic acid is useful for the tail-to-tail dimerization of acrylonitrile, proceeding without the formation of undesired by-product propionitrile. Carboxylic acids having pK a 3.5-5 are suitable as co-catalysts for the dimerization of acrylonitrile. The relationship between the logarithm of the relative rate in the dimer formation and the pKa of m- and p-substituted benzoic acids (Bronsted plot) was linear (R2 = 0.946) with a slope of -0.199. The role of the carboxylic acids can be considered to be effective protonation in the protonolysis of the carbon-ruthenium bond of an intermediate Ru complex. Copyright
