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Acta Crystallogr Sect E Struct Rep Online. 2013 Mar 23;69(Pt 4):m227-8. doi: 10.1107/S1600536813007514. Print 2013 Apr 1.

Bis[1,2-bis-(meth-oxy-carbon-yl)ethene-1,2-dithiol-ato-κ(2) S,S']bis-(η(5)-penta-methyl-cyclo-penta-dien-yl)tetra-μ3-sulfido-tetra-iron(4 Fe-Fe) hexa-fluoridophosphate.

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  • 1Faculty of Symbiotic Systems Science, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan.

Abstract

The asymmetric unit of the title compound, [Fe4(C6H6O4S2)2(C10H15)2S4]PF6, contains two different complex cations and two PF6 (-) anions. The two complex cations have similar conformations with the butterfly-like Fe4S4 core surrounded by two penta-methyl-cyclo-penta-dienyl ligands and the S atoms of two dithiol-ate ligands. In each Fe4S4 core, there are four short Fe-Fe and two long Fe⋯Fe contacts, suggesting bonding and non-bonding inter-actions, respectively. The Fe-S distances range from 2.1287 (13) to 2.2706 (16) Å for one and from 2.1233 (13) to 2.2650 (16) Å for the other Fe4S4 core. The Fe-S distances involving the dithiol-ate ligands are in a more narrow range [2.1764 (16)-2.1874 (13) Å for one and 2.1743 (14)-2.1779 (16) Å for the other cation]. There are no significant inter-actions between cations and anions.

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