Improved synthetic routes to tris(acetylacetonato)ruthenium(III) and a redetermination of the structure of the β-polymorph
摘要:
The ruthenium-blue cluster-mediated synthesis of Ru(dike)3 complexes (dike = beta-diketone) has been investigated in view of the low yields this route usually produces. Only the acetylacetonato complex of the metal was isolated without modifications to the procedure, allowing a redetermination of the crystal structure to be carried out, previously published data relating to the structure of the racemic complex is incorrect and is now superseded by a more accurate determination. Two forms of this complex have now been isolated, and a comparative analysis of these is presented here.
[EN] HOMOGENOUS PROCESS FOR THE HYDROGENATION OF CARBOXYLIC ACIDS AND DERIVATIVES THEREOF<br/>[FR] PROCEDE HOMOGENE D'HYDROGENATION D'ACIDES CARBOXYLIQUES ET DE DERIVES DE CEUX-CI
申请人:DAVY PROCESS TECHN LTD
公开号:WO2003093208A1
公开(公告)日:2003-11-13
A homogenous process for the hydrogenation of the carboxylic acids and/or derivatives thereof in the presence of a catalyst comprising ruthenium, rhodium, iron, osmium or palladium, and an organic phosphine is described in which the hydrogenation is carried out in the presence of at least about 1% by weight water. A process for regenerating a catalyst comprising ruthenium, rhodium, iron, osmium or palladium and an organic phosphine is also described in which the regeneration is carried out in the presence of hydrogen and water.
Macromolecular Helicity Induction and Memory in a Poly(biphenylylacetylene) Bearing an Ester Group and Its Application to a Chiral Stationary Phase for High-performance Liquid Chromatography
An optically inactive poly(biphenylylacetylene) bearing an ester group at the 4′-position of the pendants formed a preferred-handed helical conformation and biased axial chirality in the pendants through a noncovalent interaction with a chiral alcohol, both of which were retained (memorized) even after removal of the chiral alcohol. The chiral stationary phase for high-performance liquid chromatography, prepared by coating the polymer with macromolecular helicity memory on silica gel, showed good chiral recognition ability towards various racemates.
The optical resolution of tris(pentane-2,4-dionato)metal(III) complexes
作者:Alex F. Drake、John M. Gould、Stephen F. Mason、Carlo Rosini、Francis J. Woodley
DOI:10.1016/s0277-5387(00)87108-9
日期:1983.1
A facile large-scale opticalresolution of neutral [M(pd)3] complexes, M = Cr(III), Co(III), Ru(III), Rh(III) and Ir(III), through enantioselective complex formation with (2R, 3R)-(-)-dibenzoyltartaric acid, is described.
[EN] METHANOL PRODUCTION PROCESS<br/>[FR] PROCÉDÉ DE PRODUCTION DE MÉTHANOL
申请人:ISIS INNOVATION
公开号:WO2009130452A1
公开(公告)日:2009-10-29
The invention provides a process for producing methanol, which process comprises treating a compound which is: a sugar alcohol of formula (I) in which n is 0 or an integer equal to or greater than 1, or a sugar of formula (II) in which m is an integer equal to or greater than 1, with hydrogen in the presence of a hydrogenolysis catalyst comprising a transition metal, and thereby producing said methanol by hydrogenolysis of said compound.