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Acta Cryst. (2013). E69, m227-m228
[ doi:10.1107/S1600536813007514 ]

Bis[1,2-bis(methoxycarbonyl)ethene-1,2-dithiolato-[kappa]2S,S']bis([eta]5-pentamethylcyclopentadienyl)tetra-[mu]3-sulfido-tetrairon(4 Fe-Fe) hexafluoridophosphate

S. Inomata, S. Ito and T. Takase

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 pentamethylcyclopentadienyl ligands and the S atoms of two dithiolate ligands. In each Fe4S4 core, there are four short Fe-Fe and two long Fe...Fe contacts, suggesting bonding and non-bonding interactions, 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 dithiolate 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 interactions between cations and anions.

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