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H. Sigel, B. Fischer, B. Prijs (1977)
Biological implications from the stability of ternary complexes in solution.1 Mixed-ligand complexes with manganese (II) and other 3d ions.Journal of the American Chemical Society, 99 13
R. Tribolet, R. Martin, H. Sigel (1987)
Ternary complexes in solution. Part 49. Intramolecular equilibria in metal ion complexes of adenosine 5'-triphosphate (ATP4-): coordination of ammonia or imidazole to M(ATP)2- releases N-7 from the metal ion coordination sphereInorganic Chemistry, 26
H. Sigel, B. Fischer, B. Prijs (1977)
TERNARY COMPLEXES IN SOLUTION. 27. BIOLOGICAL IMPLICATIONS FROM THE STABILITY Y OF TERNARY COMPLEXES IN SOLUTION. MIXED-LIGAND COMPLEXES WITH MANGANESE(II) AND OTHER 3D IONSChemInform, 8
H. Sigel, A. Zuberbühler, O. Yamauchi (1991)
Comments on potentiometric pH titrations and the relationship between pH-meter reading and hydrogen ion concentrationAnalytica Chimica Acta, 255
B. Fischer, H. Sigel (1980)
Ternary complexes in solution. 35. Intramolecular hydrophobic ligand-ligand interactions in mixed ligand complexes containing an aliphatic amino acidJournal of the American Chemical Society, 102
P. Mitchell, H. Sigel (1978)
Ternary complexes in solution. 28. Enhanced stability of ternary metal ion/adenosine 5'-triphosphate complexes. Cooperative effects caused by stacking interactions in complexes containing adenosine triphosphate, phenanthroline, and magnesium, calcium, or zinc ionsJournal of the American Chemical Society, 100
G. Atkinson, J. Bauman (1963)
The Chelate Effect Studied by Calorimetry, Potentiometry, and Electron Spin ResonanceInorganic Chemistry, 2
H. Sigel, P. Amsler (1976)
Hydrolysis of nucleoside phosphates. 6. On the mechanism of the metal ion promoted dephosphorylation of purine nucleoside 5'-triphosphates.Journal of the American Chemical Society, 98 23
K. Wagner, R. Lawaczeck (1972)
NMR study on the interaction of nucleotides with aromatic amino acid derivativesJournal of Magnetic Resonance, 8
H. Sigel (1989)
Hydrophobic interactions in biological systems: some background information based on ligand-ligand interactions in metal ion complexesPure and Applied Chemistry, 61
N. Saha, H. Sigel (1982)
TERNARY COMPLEXES IN SOLUTION. 41. TERNARY COMPLEXES IN SOLUTION AS MODELS FOR ENZYME-METAL ION-SUBSTRATE COMPLEXES. COMPARISON OF THE COORDINATION TENDENCY OF IMIDAZOLE AND AMMONIA TOWARD THE BINARY COMPLEXES OF MN(II), CO(II), NI(IIChemInform, 13
The stability constants of the binary ML2+ and ternary M(ATP)L2− complexes, where L=Iq (isoquinoline) or BIm (benzimidazole) and M=Zn2+ or Cd2+, have been determined by potentiometric pH titration in aqueous solution at I=0.1 mol/L (NaClO4), T=25°C. The stability of the ternary complexes characterized by ΔlogKM=logKM(ATP)LM(ATP)L‐ logKMML corresponding to the equilibrium M(ATP)2− + ML2+ = M(ATP)L2− + M2+ in higher than what would be expected on statistical grounds. The increase may be related to the stacking interaction between the aromatic ring of the ligands L and the purine moiety of ATP4–. 1H NMR studies of Zn2+/ATP4−/L confirm the presence of stacking in the ternary complexes. It is concluded that the strength of the intramolecular stacking interaction ia dependent on the structure of the aromatic ring of the ligand L and the formation of a metal ion bridge. Possible implications an discussed briefly.
Chinese Journal of Chemistry – Wiley
Published: Jul 1, 1998
Keywords: ; ; ; ;
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