Bicyclam [6,6′-bi(1,4,8,11-tetra-azacyclotetradecane)]: a ditopic receptor for homo- and hetero-bimetallic complexes
- 1 January 1987
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 11,p. 2631-2634
- https://doi.org/10.1039/dt9870002631
Abstract
Bicyclam [6,6′-bi(1,4,8,11-tetra-azacyclotetradecane)](L2) was prepared by reducing 6,6′-bi(1,4,8,11-tetra-azacyclotetradecan-5,7-dione)(L1) with B2H6 in bis(2-methoxyethyl) ether. Ligand L2 forms homo- and hetero-binuclear complexes with Cu2+ and Ni2+, the spectral properties and the electrochemistry of which have been studied. Whereas the visible spectra are very similar to those of the mononuclear complexes with cyclam (1,4,8,11-tetra-azacyclotetradecane), the electrochemistry indicates a weak interaction between the metal ions co-ordinated by bicyclam, as shown by a shift of the second oxidation potential M2+→ M3+ to more positive values.Keywords
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