Record number :
Title of article :
Palladium phosphine complexes from 8-(thio)-theophylline, 8-(methylthio)-theophylline and 8-(benzylthio)-theophylline
Author/Authors :
Antonio Romerosa، نويسنده , , Carlos L?pez-Maga?a، نويسنده , , Mustapha Saoud، نويسنده , , Sonia Ma?as، نويسنده , , Enrique Colacio، نويسنده , , José Su?rez-Varela، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2000
Pages :
From page :
To page :
Abstract :
A series of palladium(II) complexes have been synthesized and characterized to examine the coordination chemistry of several 8-thio-purine derivatives: 8-(thio)-theophylline (8-TTH2), 8-(benzylthio)-theophylline (8-BzTTH) and 8-(methylthio)-theophylline (8-MTTH). All of the complexes have been studied by IR and multinuclear (1H, 31P, 13C NMR) spectroscopy. A representative example of a Pd complex, [cis-Pd(8-BzTT)2(PPh3)2], has been authenticated by X-ray crystallography. In this complex square-planar coordination about palladium occurs through two deprotonated N7 purine atoms cis to each other, and two triphenylphosphine phosphorus atoms. In this paper, we present and discuss details of the synthesis, characterization and structural properties of the novel complexes. The synthesis and the characterization of 8-(benzylthio)-theophylline (8-BzTTH), a new organic ligands based on the molecular skeleton of 8-thio-purine, and a new procedure to obtain 8-(methylthio)-theophylline (8-MTTH) are also presented.
Keywords :
crystal structures , palladium complexes , Purine base complexes
Journal title :
Link To Document :