Issue 5, 2004
From the journal:

Dalton Transactions

{(μ-L)[RuII(acac)2]2}n, n = 2+, +, 0, −, 2−, with L = 3,3′,4,4′-tetraimino-3,3′,4,4′-tetrahydrobiphenyl. EPR-supported assignment of NIR absorptions for the paramagnetic intermediates†

Srikanta Patra,a   Biprajit Sarkar,b   Sandeep Ghumaan,a   Jan Fiedler,c   Stanislav Záliš,c   Wolfgang Kaim*b  and  Goutam Kumar Lahiri*a  

* Corresponding authors

a Department of Chemistry, Indian Institute of Technology-Bombay, Powai, Mumbai-400076, India
E-mail: lahiri@chem.iitb.ac.in

b Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550 Stuttgart, Germany
E-mail: kaim@iac.uni-stuttgart.de

c J. Heyrovsky Institute of Physical Chemistry, Academy of Science of the Czech Republic, Dolejskova 3, CZ-18223 Prague, Czech Republic

Abstract

A complete EPR and UV-Vis-NIR spectroelectrochemical characterisation has been carried out for the series 12+/+/0/−/2− where 1 is the new complex {(μ-L)[RuII(acac)2]2}, L = 3,3′,4,4′-tetraimino-3,3′,4,4′-tetrahydrobiphenyl. The paramagnetic intermediates are identified as the anion radical (L˙−) complex 1˙− with a long-wavelength intra-ligand transition at 2160 nm and as the weakly coupled diruthenium(II,III) species 1+ (Kc = 103) with a low-intensity intervalence charge transfer (IVCT) band at 1570 nm. DFT calculations using ADF and Gaussian 03 programs support these assignments.

Graphical abstract: {(μ-L)[RuII(acac)2]2}n, n = 2+, +, 0, −, 2−, with L = 3,3′,4,4′-tetraimino-3,3′,4,4′-tetrahydrobiphenyl. EPR-supported assignment of NIR absorptions for the paramagnetic intermediates

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Article information

DOI
https://doi.org/10.1039/B315927M
Article type
Paper
Submitted
05 Dec 2003
Accepted
15 Jan 2004
First published
03 Feb 2004

Dalton Trans., 2004, 750-753

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{(μ-L)[RuII(acac)2]2}n, n = 2+, +, 0, −, 2−, with L = 3,3′,4,4′-tetraimino-3,3′,4,4′-tetrahydrobiphenyl. EPR-supported assignment of NIR absorptions for the paramagnetic intermediates

S. Patra, B. Sarkar, S. Ghumaan, J. Fiedler, S. Záliš, W. Kaim and G. Kumar Lahiri, Dalton Trans., 2004, 750 DOI: 10.1039/B315927M

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