Complexes with 2,2′-azobispyridine and related ‘S-frame’ bridging ligands containing the azo function
Bridging ligands involving the azo group NN as coordinating π acceptor function can yield dinuclear complexes with unusual electronic and structural features. In particular, 2,2′-azobispyridine (abpy) as formally derived from the ubiquitous 2,2′-bipyridine ligand is now known to form a variety of...
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Published in | Coordination chemistry reviews Vol. 219; pp. 463 - 488 |
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Main Author | |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
2001
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Subjects | |
Online Access | Get full text |
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Summary: | Bridging ligands involving the azo group NN as coordinating π acceptor function can yield dinuclear complexes with unusual electronic and structural features. In particular, 2,2′-azobispyridine (abpy) as formally derived from the ubiquitous 2,2′-bipyridine ligand is now known to form a variety of complexes. The strong electronic interaction between the ligand and one or two metal centers was first noted in 1969 by Baldwin, Lever and Parish. Among the special properties of such systems are several easily accessible oxidation states, long-wavelength charge-transfer absorptions, relatively small metal–metal distances, various forms of isomerism, and the stability of radical intermediates and/or mixed-valent states. |
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ISSN: | 0010-8545 1873-3840 |
DOI: | 10.1016/S0010-8545(01)00347-2 |