Stability constants of metal complexes of macrocyclic ligands with pendant donor groups
- 1 March 1996
- journal article
- research article
- Published by Taylor & Francis in Supramolecular Chemistry
- Vol. 6 (3-4) , 353-363
- https://doi.org/10.1080/10610279608032555
Abstract
In our studies of the stability constants of metal complexes, we have investigated a number of macrocyclic ligands with pendant donor groups. The ligands are characterized by the fact that they have nitrogen donors in the macrocyclic ring and oxygen or sulfur donors in the pendant arms. These ligands represent seven different macrocycles, and by varying the pendant donor groups, ten different ligands are indicated. The affinities of these ligands for fifteen metal ions will be described. The Fe(III) complex of triazanonane with o-hydroxypyridyl or o-hydroxybenzyl pendant donor groups are the most stable ferric complexes ever reported. The In(III) complex of triazacyclononane with pendant mercaptoethyl donor groups, is exceptionally stable. Also, the Ca(II) complex of DOTA probably has the highest stability of any calcium(II) complex. These, and other comparisons will be made on the basis of the thermodynamic stability constant data for the ligands described.Keywords
This publication has 18 references indexed in Scilit:
- Stabilities of divalent and trivalent metal ion complexes of macrocyclic triazatriacetic acidsInorganic Chemistry, 1993
- New synthetic, selective, high-affinity ligands for effective trivalent metal ion binding and transportInorganica Chimica Acta, 1992
- Stabilities of trivalent metal ion complexes of the tetraacetate derivatives of 12-, 13- and 14-membered tetraazamacrocyclesInorganica Chimica Acta, 1991
- Stabilities of the alkaline earth and divalent transition metal complexes of the tetraazamacrocyclic tetraacetic acid ligandsInorganica Chimica Acta, 1991
- Potentiometric and spectrophotometric determination of the stabilities of In(III), Ga(III) and Fe(III) complexes of N,N′,N″-tris(3,5-dimethyl-2-hydroxybenzyl)-1,4,7-triazacyclononaneInorganica Chimica Acta, 1991
- Stabilities of the Fe(III), Ga(III) and In(III) chelates of N,N′,N″-triazacyclononanetriacetic acidInorganica Chimica Acta, 1991
- Solution equilibria of enterobactin and metal-enterobactin complexesInorganic Chemistry, 1991
- Synthesis and crystal structure of a nine-coordinate gadolinium(III) complex of 1,7,13-triaza-4,10,16-trioxacyclooctadecane-N,N',N"-triacetic acidInorganic Chemistry, 1990
- N,N′,N″-tris(3-hydroxy-6-methyl-2-pyridylmethyl)-1,4,7-triazacyclonana, a new effective ligand for iron (III)Journal of the Chemical Society, Chemical Communications, 1990
- Ligand design for selective complexation of metal ions in aqueous solutionChemical Reviews, 1989