From pyridoxalrhodanine to a novel 7-azacoumarin complex of dimethylthallium(III) in a one-pot synthesis
作者:José S. Casas、Eduardo E. Castellano、María D. Couce、Agustín Sánchez、José Sordo、Carmen Taboada
DOI:10.1016/j.inoche.2012.01.038
日期:2012.5
The hydrolysis of pyridoxalrhodanine in a basic medium containing the dimethylthallium(III) cation afforded the compound [TlMe2(L)]center dot H2O (1.H2O) [HL = 5-(hydroxymethyl)-8-methyl-3-thiol-7-azacoumarin]. This compound was characterized in solid state by IR spectroscopy and in solution by H-1 and C-13H-1} NMR spectrometry. X-ray diffraction showed that the crystal consists of associated TlMe2(L) units and hydrogen bonded water molecules. The L- anion is bound to the metal mainly by a bridging S atom [Tl-S = 2.9458(18) angstrom; 2.9616(16) angstrom], although secondary interactions through O atoms (Tl-O: 2.861(5); 2.900(5) angstrom)] are also present. The longer Tl-O interaction and the hydrogen bonds of the water molecules give rise to a tridimensional polymeric structure. (C) 2012 Elsevier B.V. All rights reserved.
作者:José S. Casas、Eduardo E. Castellano、María D. Couce、Olga Crespo、Javier Ellena、Antonio Laguna、Agustín Sánchez、José Sordo、Carmen Taboada
DOI:10.1021/ic700861a
日期:2007.8.1
triethylphosphinegold(I) chloride, and sodium methoxide in methanol unexpectedly afforded the azacoumarin complex [Au(TS)(PEt3)] [HTS = 5-(hydroxymethyl)-8-methyl-3-thiol-7-azacoumarin], which was characterized by X-ray diffractometry. Its crystals consist of independent molecules in which the metal atom is bound to the azacoumarin [Au-S = 2.9458(18) A] and the phosphine [Au-P = 2.262(2) A] in an almost linear arrangement