The crystal and molecular structure of bis(thiourea)iron (11) thiocyanate |
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| Authors: | Giovanni Valle Umberto Russo Sandro Calogero |
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| Affiliation: | (1) Centro di Ricerca sui Biopolimeri del C.N.R., Via Marzolo 1, 1, 35100 Padova, Italy;(2) Istituto di Chimica Generale ed Inorganica, Università di Padova, Via Loredan 4, 35100 Padova, Italy;(3) Laboratorio di Chimica e Tecnologia dei Radioelementi del C.N.R., Corso Stati Uniti, 35100 Padova, Italy |
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| Abstract: | Summary The crystal structure of bis(thiourea)iron(II) thiocyanate, Fe[SC(NH2)2]2(NCS)2, has been determined and refined by three-dimensional x-ray analysis. The complex crystallizes in the triclinic system, space group P –1, witha = 10.114(6),b = 7.662(8),c = 3.897(10) Å,  = 105.0(2)°,  = 81.8(3)°,  = 96.4(3)° andz = 1. It is isostructural with M(tu)2(NCS)2, where M = Mn, Co or Ni and to = thiourea. The iron atom is located on a centre of symmetry and is coordinated to four planar sulfur atoms of the thiourea ligands (Fe-S 2.61 and 2.65 Å) and two nitrogen atoms of the thiocyanate groups (Fe-N 2.05 Å) in a distorted octahedral way. These octahedra are linked in chains with each thionilic sulfur atom shared by two adjacent iron atoms; magnetic measurements, Mössbauer and spectroscopic data are consistent with this polymeric structure. |
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