Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume -, Issue 30, Pages 4833-4845Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.201200679
Keywords
Guanidine; Redox chemistry; Coordination compounds; Copper; Density functional calculations
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Funding
- Deutsche Forschungsgemeinschaft (DFG)
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Herein we report on the synthesis and some aspects of the chemistry of the new redox-active ligands 2,3,5,6-tetrakis(tetramethylguanidino)pyridine, 2,3,5,6-tetrakis(tetramethylguanidino)-p-benzoquinone and 2,3,5,6-tetrakis(N,N'-dimethyl-N,N'-ethyleneguanidino)-p-benzoquinone. All three ligands are strong electron donors. In addition, the p-benzoquinone systems feature low LUMO energies and small HOMOLUMO gaps. A comparison of the ligands was made with regard to their optical properties, Bronsted basicity and electron-donor properties; results of quantum chemical calculations were included in this comparison. Subsequently, dinuclear copper complexes were prepared. Preliminary experiments on their redox chemistry followed.
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