Complexation behaviour of C- and N-functionalized tetradentate ligands based on 1,5,9-triazacyclododecane
- 1 January 1996
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 6,p. 1109-1115
- https://doi.org/10.1039/p29960001109
Abstract
The synthesis and aqueous complexation behaviour of C- and N-linked o-hydroxyaryl substituted derivatives of 1,5,9-triazacyclododecane is reported. The N-linked ligand forms strong 1:1 complexes with copper and zinc (log KML= 18.7 and 14.1, respectively) in which the phenolate acts as an effective donor ligand in the putative tetrahedral complex. The ligand substituted at carbon at the 3-position is less basic and forms much weaker complexes with Cu2+, Ni2+ and Zn2+(log KCuL, 10.2, log KZnL 7.32 and log KNiL 6.11) in which phenolate participation is absent.Keywords
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