Crystal structure of poly[tetra-l-cyanido-ethanolbis(2-iodopyrazine)digold(I)iron(II)]

Abstract

In the title polymeric complex, [Au2Fe(CN)4(C4H3IN2)2(C2H6O)]n, the FeII cation is coordinated by two iodopyrazine molecules, one ethanol molecule and three dicyanoaurate anions in a distorted N5O octahedral geometry. In the crystal, the dicyanoaurate anions bridge the FeII cations to form polymeric chains propagating along the b-axis direction. Stabilization of the crystal structure is provided by O—H N hydrogen bonds and – stacking between parallel iodopyrazine rings of neighbouring chains, the centroid–centroid distances being 3.654 (10) and 3.658 (9) A˚.