Thermodynamics of triaryltin chloride adduct complexes

Asadi, Mozaffar; Jamshid, Khosrow Aein
January 2001
Canadian Journal of Chemistry;Jan2001, Vol. 79 Issue 1, p70
Academic Journal
The stability constants and the thermodynamic data were measured spectrophotometerically for 1:1 adduct formation of triaryltin chlorides, where aryl groups are p-chlorophenyl, phenyl, p-, m-, and o-tolyl, as Lewis acids, with chloride and bromide ions, as Lewis bases, in 50 v/v ethanol-water solvent. The stability constants and the thermodynamic parameters trend, confirmed the following softness trend of tin(IV) in the triaryltin chlorides:(p-, m-, o-tolyl)[sub 3] SnCl > (phenyl)[sub 3] SnCl > (p-chlorophenyl)[sub 3] SnClKey words: tin(IV) complexes, thermodynamic parameters, mixed solvent, adduct formation.Op�rant dans des solutions aqueuses d'�thanol � 50 v/v et faisant appel � la spectroscopie, on a mesur� les constantes de stabilit� et les donn�es thermodynamiques pour la formation de l'adduit 1:1 de chlorures de triaryl�tain (dans lesquels les groupes aryles sont p-chloroph�nyle, ph�nyle, p-, m- et o-tolyle) agissant comme acides de Lewis avec les ions chlorure et bromure agissant comme bases de Lewis. Les constantes de stabilit� et la tendance des param�tres thermodynamiques permet de confirmer la tendance suivante dans la mollesse de l'�tain(IV) dans les chlorures de triaryl�tain:(p-, m- et o-tolyl)[sub 3] SnCl > (ph�nyl)[sub 3] SnCl > (p-chloroph�nyl)[sub 3] SnClMots cl�s : complexes d'�tain(IV), param�tres thermodynamiques, solvant mixte, formation d'adduit.[Traduit par la R�daction]


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