Salts of the tris(violurato)ferrate(II) ion: crystal structureof ammonium tris(violurato)ferrate(II) hydrate
- 1 January 1976
- journal article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 19,p. 1915-1919
- https://doi.org/10.1039/dt9760001915
Abstract
Salts of the type M+[FeV3]–·xH2O have been prepared (where M+= alkali-metal cation, V–= violurate) and found to be diamagnetic. The crystal structure of the title compound [NH4][FeV3]·ca. 4.5H2O has been determined by X-ray diffraction and refined by least squares to R 0.07 for 3 868 observed reflections. Crystals are triclinic, space group P, a= 16.242(3), b= 15.690(3), c= 9.848(2)Å, α= 90.95(2), β= 106.99(2), γ= 74.20(2)°, Z= 4. There are two independent cations and anions in the asymmetric unit; the geometry of the anion co-ordinated by three bidentate violurate ligands (V–= C4O4N3H2 –) is fac(means: Fe–O 1.983, Fe–N 1.877Å), and closely resembles that found in ferroverdin. The accuracy of the structure is inhibited by serious disorder among the solvent molecules in the lattice.Keywords
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