Tuning the properties of redox-active guanidino-functionalized aromatic ligands by substitution: experiment and theory
Substitution of the aromatic hydrogen atoms in the electron donors 1,2,4,5-tetrakis(tetramethylguanidino)benzene (1a) and 1,2,4,5-tetrakis(N,N′-dimethyl-N,N′-ethyleneguanidino)benzene (1b) by iodide (to give 2a and 2b) and nitro groups (to give 3a and 3b) afforded new redox-active ligands. Their pro...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
09 February 2012
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| In: |
European journal of inorganic chemistry
Year: 2012, Issue: 10, Pages: 1620-1631 |
| ISSN: | 1099-0682 |
| DOI: | 10.1002/ejic.201101366 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1002/ejic.201101366 Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/ejic.201101366 
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| Author Notes: | Anastasia Peters, Hendrik Herrmann, Martin Magg, Elisabeth Kaifer, Hans-Jörg Himmel |
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| 520 | |a Substitution of the aromatic hydrogen atoms in the electron donors 1,2,4,5-tetrakis(tetramethylguanidino)benzene (1a) and 1,2,4,5-tetrakis(N,N′-dimethyl-N,N′-ethyleneguanidino)benzene (1b) by iodide (to give 2a and 2b) and nitro groups (to give 3a and 3b) afforded new redox-active ligands. Their properties (electron donor capacity, Brønsted basicity and optical spectra) have been analyzed and compared with the unsubstituted 1,2,4,5-tetrakis(guanidino)benzenes. The experimental results are supplemented by quantum chemical calculations. The first late-transition metal complex of the push-pull ligand 3a was prepared and characterized and its oxidation studied. | ||
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| 650 | 4 | |a Redox chemistry | |
| 650 | 4 | |a Substituent effects | |
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