In the title hydrated double salt, 4,4'-(ethene-1,2-di-yl)dipyridin-1-ium hexa-aqua-iron(II) bis-(sulfate) monohydrate, (C12H12N2)[Fe(H2O)6](SO4)2·H2O, the Fe(II) cation is coordin-ated by six water mol-ecules in a slightly distorted octa-hedral geometry; the two pyridine rings of the 4,4'-(ethene-1,2-di-yl)dipyridin-1-ium cation are twisted to each other by a dihedral angle of 11.84 (10)°. In ...

In the crystal of the title compound, [Fe(NCS)3(H2O)3]·3C6H8N2, the Fe(III) cation is located on a threefold rotation axis and is coordinated by three N atoms of the thiocyanate anions and three water mol-ecules in a fac arrangement, forming a slightly distorted N3O3 octa-hedron. Stabilization within the crystal structure is provided by O-H⋯N hydrogen bonds; the H atoms from coordinating water ...

We use a quantitative convergent beam electron diffraction based method to image the valence electron density distribution in Ba(Fe1-xCox)2As2. We show a remarkable increase in both the charge quadrupole of the Fe cations and the charge dipole of the arsenic anions upon Co doping from x=0 (Tc=0  K) to x=0.1 (Tc=22.5  K). Our data suggest that an unexpected electronic correlation effect, namely ...

In the title salt, (C(10)H(9)N(2))(2)[Fe(C(8)H(2)NO(6))(C(8)H(3)NO(6))]·3H(2)O, the Fe(III) atom is O,N,O'-chelated by dianionic and trianionic ligands in a slightly distorted octa-hedral coordination geometry. The cations and ferrate anions are linked into a layered structure; the layers are connected through the uncoordinated water mol-ecules into a hydrogen-bonded three-dimensional supra-mol...

In the title mononuclear iron(III) complex, [Fe(C(15)H(13)N(2)O(3))(2)]Cl·H(2)O, the Fe(III) atom has a distorted octa-hedral geometry and is six-coordinated by four O atoms and two N atoms from two ligands. In the crystal structure, the complex cations, Cl(-) anions and water mol-ecules are connected into a chain along [100] through N-H⋯O, O-H⋯Cl and N-H⋯Cl hydrogen bonds. Two adjacent chains ...

Iron sulfur cluster anions (FeS)m- (m = 2-8) are studied by photoelectron spectroscopy (PES) at 3.492 eV (355 nm) and 4.661 eV (266 nm) photon energies, and by density functional theory (DFT) calculations. The most probable structures and ground state spin multiplicities for (FeS)m- (m = 2-8) clusters are tentatively assigned through a comparison of their theoretical and experiment first vertic...

In the title compound, (C(6)H(14)N(2))[Fe(C(2)O(4))Cl(2)(H(2)O)(2)]Cl, all ions are situated on twofold rotational axes. The Fe(III) ion is coordinated by two O atoms from a chelating oxalate ligand, two water mol-ecules and two chloride anions in a distorted octa-hedral geometry. Inter-molecular N-H⋯O, O-H⋯O and O-H⋯Cl hydrogen bonds form an extensive three-dimensional network which consolidat...

Since the discovery of perchlorate salts on Mars and the known occurrence of ferric salts in the regolith, there is a distinct possibility that the title compound could form on the surface of Mars. [Fe(H2O)6](ClO4)3·3H2O was crystallized from aqueous solutions at low temperatures according to the solid-liquid phase diagram. It consists of Fe(H2O)6 octa-hedra (point group symmetry -3.) and perch...

The title salt, [Fe(II)(C4H3ClN2)2(H2O)4](C7H7O3S)2, contains a complex cation with point group symmetry 2/m. The high-spin Fe(II) cation is hexa-coordinated by four symmetry-related water and two N-bound 2-chloro-pyrazine mol-ecules in a trans arrangement, forming a distorted FeN2O4 octa-hedron. The three-dimensional supra-molecular structure is supported by inter-molecular O-H⋯O hydrogen bond...

A new organic-inorganic hybrid compound, penta-morpholinium hexa-hydrogen hexa-molybdoferrate(III) sulfate 3.5-hydrate, (C4H10NO)5[Fe(III)(OH)6Mo6O18](SO4)·3.5H2O, was obtained from an aqueous solution. The polyoxidomolybdate (POM) anion is of the Anderson β-type with a central Fe(III) ion. Three of five crystallographically independent morpholinium cations are disordered over two sets of sites...