COMPLEX EQUILIBRIA INVOLVING TRIPHENYLTIN(IV) WITH SOME SELECTED AMINO-ACIDS AND NUCLEOTIDES

Complex formation equilibria for triphenyltin(IV) with selected aminoa cids and nucleotides having a variety of model functional groups were studied. Stoichiometries and stability constants for the complexes for med were determined by a potentiometric technique, in 75% dioxane-wate r solution. Amino acids and nucleotides are bound to Ph3Sn(IV) as mono dentates. The effect of the pK(a) of the amino acid on the stability c onstant of its complex species was elucidated. Concentration distribut ions of the various complex species were evaluated as a function of pH .