Chemistry of ruthenium. Part 10. Triazene 1-oxide complexes of bis(2,2'-bipyridine)ruthenium-(II) and -(III). Synthesis, spectra, and electrochemistry

Mukherjee, Rabindra Nath ; Chakravorty, Animesh (1983) Chemistry of ruthenium. Part 10. Triazene 1-oxide complexes of bis(2,2'-bipyridine)ruthenium-(II) and -(III). Synthesis, spectra, and electrochemistry Journal of the Chemical Society, Dalton Transactions (10). pp. 2197-2203. ISSN 0300-9246

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Official URL: http://pubs.rsc.org/en/Content/ArticleLanding/1983...

Related URL: http://dx.doi.org/10.1039/DT9830002197

Abstract

Mixed ruthenium complexes of type [Ru(bipy)2L]ClO4·H2O derived from 2,2'-bipyridine (bipy) and triazene 1-oxides, RN(O)N-NH-C6H4X-p(HL: R = Et or Ph; X = Me, H, Cl, CO2Et, or NO2) are described. In solution they display two quasi-reversible reductions due to electron transfer to co-ordinated bipy units. The RuIII-RuII couple occurs in the range 0.16-0.44 V versus s.c.e. The formal potential of this couple is linearly related to the Hammett constant of substituent X. The low-spin ruthenium(III) analogue, [Ru(bipy)2L]2+, is furnished by both coulometric and chemical oxidations. The energy of the ligand-to-metal charge-transfer band of [Ru(bipy)2L]2+ correlates linearly with the RuIII-RuII formal potential.

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