Redetermination of (acetonitrile-κN)dicarbon­yl(η⁵-cyclo­penta­dien­yl)iron(II) tetra­fluoridoborate

The crystal structure of the title compound, [Fe(C₅H₅)(CH₃CN)(CO)₂]BF₄, of which only the coordinates of the non-H atoms of the cation have previously been reported [Fadel et al. (1979). Z. Anorg. Allg. Chem. 453, 98–106] has been redetermined. The Fe^II atom in the complex cation is coordinated by a cyclo­penta­dienyl ring, two carbonyl ligands and an acetonitrile mol­ecule displaying a three-legged piano stool structure. Three of the four F atoms of the BF₄⁻ anion are disordered over two sets of sites, with a site-occupancy factor of 0.709 (10) for the major occupied site.