Abstract: The stability constants of ternary complexes of the type Zn (ATP) L2-.,where L=pyridine, 4-7 icoline, 3, 4- lutidine and 3, 5- lutidine,have been determined by potentiometric pll titration in aqueous solutio...Abstract: The stability constants of ternary complexes of the type Zn (ATP) L2-.,where L=pyridine, 4-7 icoline, 3, 4- lutidine and 3, 5- lutidine,have been determined by potentiometric pll titration in aqueous solution and compared with the stabililty of the corresponding binary complexes ZuL2+. It has been observed that there is a stacking interact ion between the pyridine ring of the pyridine-like the ligands and the purine moiety of ATP in the ternary Zn (ATP) La- complexes and this stacking interaceion is stronger than that in corresponding Cu (ATP) L2- complexes.展开更多
The stability constants of the binary complexes of Cu2+ with adenine and guanine as well as the ternary complexes of Cu (ATP) with the same ligands have been measured in aqueous solution spectrophotometrically and a ...The stability constants of the binary complexes of Cu2+ with adenine and guanine as well as the ternary complexes of Cu (ATP) with the same ligands have been measured in aqueous solution spectrophotometrically and a strong stacking interaction between the heteroaromatic ring of the ligands and the purine moiety of ATP has been found. This stacking interaction may be one of the factors affecting the stability of the nucleic acid helices .展开更多
文摘Abstract: The stability constants of ternary complexes of the type Zn (ATP) L2-.,where L=pyridine, 4-7 icoline, 3, 4- lutidine and 3, 5- lutidine,have been determined by potentiometric pll titration in aqueous solution and compared with the stabililty of the corresponding binary complexes ZuL2+. It has been observed that there is a stacking interact ion between the pyridine ring of the pyridine-like the ligands and the purine moiety of ATP in the ternary Zn (ATP) La- complexes and this stacking interaceion is stronger than that in corresponding Cu (ATP) L2- complexes.
文摘The stability constants of the binary complexes of Cu2+ with adenine and guanine as well as the ternary complexes of Cu (ATP) with the same ligands have been measured in aqueous solution spectrophotometrically and a strong stacking interaction between the heteroaromatic ring of the ligands and the purine moiety of ATP has been found. This stacking interaction may be one of the factors affecting the stability of the nucleic acid helices .
