New bis(ferrocenecarbonyl)- and bis(ferrocenyl)-appended diazatetrathia mixed-donor macrocyclic ligands and their copper-(II) and -(I) complexes
- 1 January 1991
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 10,p. 2485-2492
- https://doi.org/10.1039/dt9910002485
Abstract
New bis(ferrocenecarbonyl)-, bis(ferrocenyl)- and dibenzyl-appended diazatetrathia mixed-donor macrocyclic ligands L1, L2 and L3 have been prepared. Copper-(II) and -(I) complexes of these ligands have been isolated and characterised. Single-crystal X-ray structures of 7,16-bis(ferrocenemethyl)-1,4,10,13-tetrathia-7,16-diazacyclooctadecane (L2) and of its copper(I) complex [CuL2]PF6 have also been determined. Electrochemical investigations reveal the respective ferrocene–ferrocenium redox couples of ligands L1 and L2 are perturbed to more positive potentials on co-ordination of the copper(II) ion. These copper(II) complexes also exhibit quasi-reversible copper(II)–copper(I) redox couples at negative potentials (versus saturated calomel electrode).Keywords
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