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. 2014 Jan 8;70(Pt 2):m32-3.
doi: 10.1107/S1600536813034946. eCollection 2014 Feb 1.

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

Andrew P Purdy  1 , Ray J Butcher  2
Affiliations

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

Andrew P Purdy et al. Acta Crystallogr Sect E Struct Rep Online. .

Abstract

The title compound, [K2Fe{OCH(CF3)2}4] n , was formed from the reaction of potassium hexa-fluoro-isopropoxide with iron(II) chloride in toluene. The Fe(II) atom has a highly distorted tetra-hedral coordination environment. All four of the non-equivalent hexa-fluoro-isoprop-oxy 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 hexa-fluoro-isoprop-oxy groups and F atoms is also present. The crystal studied was refined as an inversion twin.

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Figures

Fig. 1.
Fig. 1.
Structure of the repeat unit of [K2Fe(OCH(CF3)2)4]. Ellipsoids are at the 30% probability level.
Fig. 2.
Fig. 2.
Diagram showing the potassium coordination environment.
Fig. 3.
Fig. 3.
Packing diagram depicting some of the hydrogen bonding.
See this image and copyright information in PMC

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