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Citation: Liu Guang-Hua, Li Le-Min, Xu Guang-Xian, Liang Zhen-Xuan. Study on the Electronic Structure of Five Coordinate Iron-Sulfur Clusters with Two Irons[J]. Acta Physico-Chimica Sinica, ;1991, 7(01): 64-71. doi: 10.3866/PKU.WHXB19910110 shu

Study on the Electronic Structure of Five Coordinate Iron-Sulfur Clusters with Two Irons

1.
Department of Chemistry, Peking University, Beijing; The Computer Center, the Chinese Academy of Sciences

Received Date: 20 December 1989
Available Online: 15 February 1991

The electronic structure and chemical bonding of the five coordinate iron clusters [Fe(XCHCHS)_2]_2~n-[X=O, (Ⅰ); X=S, (Ⅱ); n=2, 3, 4] and their monomers have been studied. The calculated data of the quadrupole splitting and chemical isomer shift are in od agreement with those of experiments.The multiplet of the iron in the oxidized ground state of cluster(Ⅰ) is 6, while that of (Ⅱ) is 4, in accordance with the experimental results. The calculation result shows that the oxidation-reduction process in fact takes place on iron, but the electrons gained or lost transfer to the ligand atoms through charge relaxation. The formation of these clusters can be considered as dimerization of two fragments through interaction of their orbitals in the frontier region. An explanation about the configuration difference between (I) and (II) is proposed.
- Five coordinate iron clusters; Electronic structure
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