Poly[tetrakis(μ-1,1,1,3,3,3-hexafluoropropan-2-olato)iron(II)dipotassium]

The title compound, [K(2)Fe{OCH(CF(3))(2)}(4)](n), was formed from the reaction of potassium hexa­fluoro­isopropoxide with iron(II) chloride in toluene. The Fe(II) atom has a highly distorted tetra­hedral coordination environment. All four of the non-equivalent hexa­fluoro­isoprop­oxy O atoms link the Fe(II) atoms to one of the K(+) atoms in an alternating chain of Fe—O—K—O fused four-membered rings, with K—Fe distances of 3.715 (2) and 3.717 (2) Å. This K(+) atom is also bridged to eight of the F atoms. The other K(+) atom is bonded to only two of the O atoms, but has seven short K⋯F contacts, one of which links the chains into a three-dimensional arrangement. Weak hydrogen bonding between the lone H atoms on the hexa­fluoro­isoprop­oxy groups and F atoms is also present. The crystal studied was refined as an inversion twin.