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
Authors:	PATRA, S SARKAR, B GHUMAAN, S FIEDLER, J KAIM, W LAHIRI, GK
Keywords:	creutz-taube ion bridging ligand molecular wires polynuclear complexes ruthenium complexes crystal-structure electron-transfer redox mononuclear transition
Issue Date:	2004
Publisher:	AMER CHEMICAL SOC
Citation:	INORGANIC CHEMISTRY, 43(19), 6108-6113
Abstract:	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.
URI:	http://dx.doi.org/10.1021/ic049346r http://dspace.library.iitb.ac.in/xmlui/handle/10054/3921 http://hdl.handle.net/10054/3921
ISSN:	0020-1669
Appears in Collections:	Article

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