Abstract
Diorganotin(IV) dichlorides react with 4-amino-6-hydroxy-2-mercapto pyrimidine (AHMP) forming the complexes R2SnCl(L) and R2Sn(L)(2) (L = AHMP; R = CH3; n-Bu). The bonding sites of the dimethyltin (IV) complexes with (AHMP) are investigated by means of elemental analyses, FTIR and H-1 NMR. Complex formation equilibria of dimethyltin (IV) with 4-amino-6-hydroxy-2-mercapto pyrimidine (AHMP) have been investigated. Stoichiometry and stability constants for the complexes formed are determined at different temperatures and ionic strength 0.1 M NaNO3. The results show the formation of 1:1 and 1:2 complexes (dimethyltin : AHMP). The concentration distribution of the complexes in solution is evaluated. The thermodynamic parameters Delta H-0 and Delta S-0 calculated from the temperature dependence of the equilibrium constants are investigated.