Synthesis and Crystal Structure of Ammonium,Strontium Hexacyanoferrate(II) Dihydrate |
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| Authors: | L. Medina Córdoba,J. A. Morán,S. Santos Suffix" >Jr.,O. E. Piro,M. I. Gómez |
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| Affiliation: | 1.Instituto de Química Inorgánica, Facultad de Bioquímica, Química y Farmacia,Universidad Nacional de Tucumán,San Miguel de Tucumán,Argentina;2.Coordena??o de Física, Campus de Jataí,Universidade Federal de Goiás,Jataí,Brazil;3.Departamento de Física, Facultad de Ciencias Exactas,Universidad Nacional de La Plata and Institute IFLP (CONICET, CCT-La Plata),La Plata,Argentina |
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| Abstract: | Abstract The molecular structure of Sr(NH4)2[Fe(CN)6]·2H2O, was determined by X-ray diffraction methods. It crystallizes in the orthorhombic Pnma space group with a = 13.1420(3), b = 14.1656(4), c = 7.3364(2) ?, and Z = 4. The structure was solved and refined. The iron(II) complex is located on a crystallographic inversion center with the metal in a nearly perfect octahedral environment [Fe–C bond distances from 1.919(4) to 1.939(4) ?]. The Sr(II) ion lies on a crystallographic mirror plane, sandwiched between two nearly square Archimedean anti-prism basis, angled 45o from each other. One base is formed by the two water molecules located on the mirror plane [Sr···Ow distances of 2.741(4) and 2.636(4) ?] and by a pair of mirror-related cyanide N-atom [d(Sr···N) = 2.676(3) ?], the other one by two pairs of mirror-related cyanide nitrogen atoms [Sr···N distances of 2.649(3) and 2.640(4) ?] of neighboring [Fe(CN)6]4− anions. The infrared absorption spectrum of the compound was also recorded and briefly discussed. |
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