Table of Contents
Research Letters in Inorganic Chemistry
Volume 2009, Article ID 243296, 4 pages
http://dx.doi.org/10.1155/2009/243296
Research Letter

Exchange Interaction in Complex Bis[(1,3-Dithiole-2-Thione-4,5-Dithiolato)-di-(Carbonyl)-Cyclopentadienyl Iron(II)]

1V. N. Karazin Kharkiv National University, 61077 Kharkiv, Ukraine
2Institute of Chemistry, Jan Kochanovski University, 25020 Kielce, Poland
3Department of Chemistry , Lomonosov Moscow State University, 119991 Moscow, Russia
4Centre of Low Temperature Physics, Faculty of Science, P.J. Šafárik University; IEP SAS, 04180 Košice, Slovakia

Received 22 June 2009; Accepted 5 August 2009

Academic Editor: George Koutsantonis

Copyright © 2009 S. V. Vitushkina et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The splitting of the quasidegenerate electronic states in dinuclear bis[(1,3-dithiole-2-thione-4,5-dithiolato)-di-(carbonyl) -cyclopentadienyliron (II)] complex with the bridging, S–S coupled, dimerized sulfur-rich dithiolate ligands, [Fe(C5H5)(CO)2(C3S5-C3S5)Fe(C5H5)(CO)2] (I) was found by the means of Mössbauer spectroscopy and by the measurement of the temperature dependence of magnetic susceptibility in a wide temperature range from 2?K to 300?K. The experimental results were confirmed by the calculations of the singlet and triplet states of the complex, as well as of the distribution of spin density within the bounds of the DFT method in the B3LYP/6-31(dp)G basis. In the more stable triplet state, the spin density is significantly delocalized, which is a characteristic of olefindithiolate complexes.