Designed synthesis of a multimetallic system having Ru4Cu2 core using trimetallic coordination of 2,2′-biimidazolate ion

Kunal K. Kamar; Larry R. Falvello; Philip E. Fanwick; Jinkwon Kim; Sreebrata Goswami

doi:10.1039/B404222K

Designed synthesis of a multimetallic system having Ru₄Cu₂ core using trimetallic coordination of 2,2′-biimidazolate ion†

Kunal K. Kamar,^a Larry R. Falvello,^b Philip E. Fanwick,^c Jinkwon Kim^d and Sreebrata Goswami*^a

* Corresponding authors

^a Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, Kolkata, India
E-mail: icsg@mahendra.iacs.res.in
Fax: (+91) 33 2473 2805

^b Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Zaragoza, Zaragoza, Spain

^c Department of Chemistry, Purdue University, West Lafayette, IN, USA

^d Department of Chemistry, Kongju National University, 182 Shinkwan, Kongju, Chungnam, Republic of Korea

Abstract

Synthesis of a novel hexametallic compound, [{(bpy)₂Ru(biim)}₄Cu₂](ClO₄)₄, 3 (bpy = 2,2′-bipyridine and biim = 2,2′-biimidazolate dianion) from a monometallic complex, [(bpy)₂Ru(biim)] and hydrated Cu(ClO₄)₂ is described. The X-ray structure consists of four octahedral ruthenium(II) centers arranged around a bimetallic Cu₂-core. The four octahedral [(bpy)₂Ru(biim)] units arranged around the Cu₂-moiety that resulted in a propeller shape arrangement. The results of cryomagnetic measurements on the di-copper complex indicate that the two Cu(II) ions are coupled antiferromagnetically through the two bridging biim ligands. The EPR spectrum of the complex showed a typical axial spectrum. Optical spectra and redox properties of 3 are reported. An intense absorption at 525 nm is assigned as Ru(dπ) → π*(bpy) transition.

Article information

https://doi.org/10.1039/B404222K

Article type

Paper

Submitted

19 Mar 2004

Accepted

27 Apr 2004

First published

11 May 2004

Download Citation

Dalton Trans., 2004, 1827-1831

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Designed synthesis of a multimetallic system having Ru₄Cu₂ core using trimetallic coordination of 2,2′-biimidazolate ion

K. K. Kamar, L. R. Falvello, P. E. Fanwick, J. Kim and S. Goswami, Dalton Trans., 2004, 1827 DOI: 10.1039/B404222K

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