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Isovalent and mixed-valent diruthenium complexes [(acac)(2)Ru-II (mu-bpytz)Ru-II(acac)(2)] and [(acac)(2)Ru-II(mu-bpytz)Ru-III(acac)(2)](ClO4) (acac= acetylacetonate and bpytz=3,6-bis(3,5-dimethylpyrazolyi)-1,2,4,5-tetrazine): Synthesis, spectroelectrochemical, and EPR investigation

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Title Isovalent and mixed-valent diruthenium complexes [(acac)(2)Ru-II (mu-bpytz)Ru-II(acac)(2)] and [(acac)(2)Ru-II(mu-bpytz)Ru-III(acac)(2)](ClO4) (acac= acetylacetonate and bpytz=3,6-bis(3,5-dimethylpyrazolyi)-1,2,4,5-tetrazine): Synthesis, spectroelectrochemical, and EPR investigation
 
Creator PATRA, S
SARKAR, B
GHUMAAN, S
FIEDLER, J
KAIM, W
LAHIRI, GK
 
Subject creutz-taube ion
bridging ligand
molecular wires
polynuclear complexes
ruthenium complexes
crystal-structure
electron-transfer
redox
mononuclear
transition
 
Description The title compounds involving the structurally characterized bridging ligand bpytz were characterized, showing very strong electrochemical stabilization of the mixed-valent (RuRuIII)-Ru-II state (K-c = 10(13.9)) but no detectable (epsilon < 20 M-1 cm(-1)) intervalence charge-transfer band in the infrared region. In situ reduction of the neutral precursor produces a diruthenium(II) complex of the bpytz radical anion according to EPR spectroscopy, whereas oxidation of the mixed-valent form leads to a diruthenium(III) species.
 
Publisher AMER CHEMICAL SOC
 
Date 2011-07-14T09:34:09Z
2011-12-26T12:48:19Z
2011-12-27T05:48:45Z
2011-07-14T09:34:09Z
2011-12-26T12:48:19Z
2011-12-27T05:48:45Z
2004
 
Type Article
 
Identifier INORGANIC CHEMISTRY, 43(19), 6108-6113
0020-1669
http://dx.doi.org/10.1021/ic049346r
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3921
http://hdl.handle.net/10054/3921
 
Language en