46 research outputs found
Tris(1,10-phenanthroline-κ2 N,N′)iron(II) bis[(1,10-phenanthroline-κ2 N,N′)tetrakis(thiocyanato-κN)chromate(III)] acetonitrile trisolvate monohydrate
Single crystals of the title heterometallic compound, [Fe(C12H8N2)3][Cr(NCS)4(C12H8N2)]2·3CH3CN·H2O or [Fe(Cphen)3][Cr(NCS)4(phen)]2·3CH3CN·H2O, were prepared using the one-pot open-air reaction of iron powder, Reineckes salt and 1,10-phenanthroline (phen) in acetonitrile. The asymetric unit consists of an [Fe(phen)3]2+ cation, two [Cr(phen)(NCS)4]− anions, three acetonitrile solvent molecules and a water molecule. The Fe and Cr atoms both show a slightly distorted octahedral FeN6 and CrN6 coordination geometry with adjacent angles in the range 79.67 (12)–95.21 (12)°. No classical hydrogen bonding involving the water molecule is observed
Tris(2,2′-bipyridine-κ2 N,N′)cobalt(III) tris(oxalato-κ2 O 1,O 2)ferrate(III) monohydrate
The title compound, [Co(C10H8N2)3][Fe(C2O4)3]·H2O, consists of two discrete tris(chelate) metal ions (CoIIIN6 and FeIIIO6 chromophores) and a water molecule. The structure is highly symmetrical; the CoIII and FeIII ions occupy positions with site symmetry 3.2. The coordination polyhedra of the metal atoms have a nearly octahedral geometry with noticeable trigonal distortions. The Co—N and Fe—O bond lengths are equal by symmetry, viz. 1.981 (2) and 1.998 (4) Å, respectively. The cations and anions are arranged alternately along their threefold rotation axes parallel to [001], forming chains that are packed in a hexagonal manner. The water molecules occupy voids between the chains. The crystal under investigation was an inversion twin
Bis{μ2-2-[(2-hydroxyethyl)(methyl)amino]ethanolato}bis(μ3-N-methyl-2,2′-azanediyldiethanolato)tetrakis(thiocyanatato-κN)dichromium(III)dimanganese(II) dimethylformamide tetrasolvate
The heterometallic title complex, [Cr2Mn2(C5H11NO2)2(C5H12NO2)2(NCS)4]·4C3H7NO, was prepared using manganese powder, Reineckes salt, ammonium thiocyanate and a non-aqueous solution of N-methyldiethanolamine in air. The centrosymmetric molecular structure of the complex is based on a tetranuclear {Mn2Cr2(μ-O)6} core. The tetranuclear complex molecule and the two uncoordinated dimethylformamide molecules are linked by O—H⋯O hydrogen bonds, while the two other molecules of dimethylformamide do not participate in hydrogen bonding
Diammine(2,2′-bipyridine)bis(thiocyanato-κN)cobalt(III) diamminetetrakis(thiocyanato-κN)chromate(III) acetonitrile disolvate
The new heterometallic title complex, [Co(NCS)2(C10H8N2)(NH3)2][Cr(NCS)4(NH3)2]·2CH3CN, has been prepared using the open-air reaction of cobalt powder, Reineckes salt and 2,2′-bipyridine (dpy) in acetonitrile. The crystal structure consists of discrete cationic [Co(NCS)2(NH3)2(dpy)]+ and anionic [Cr(NCS)4(NH3)2]− building blocks, both with 2 symmetry, and acetonitrile solvent molecules, which are linked together by N—H⋯N hydrogen bonds, forming extended supramolecular chains. Furthermore, N—H⋯S, C—H⋯S and C—H⋯N hydrogen bonds interlink neighbouring chains into a three-dimensional framework. The Co atom is in an elongated octahedral coordination environment with two N atoms from the dpy ligands and two NCS-groups in the equatorial plane and with two NH3 molecules at the axial positions. The CrIII ion is octahedraly coordinated by two NH3 molecules at the axial positions and four NCS-groups in the equatorial plane. Intensity statistics indicated non-merohedral twinning with the twin matrix [100; 00; 0]. The refined ratio of the twin components is 0.530 (1):0.470 (1)
Hexakis(dimethylformamide-κO)manganese(II) (dimethylformamide-κO)pentakis(thiocyanato-κN)chromate(III)
The title compound, [Mn(C3H7NO)6][Cr(NCS)5(C3H7NO)], was obtained unintentionally as a product of an attempted synthesis of heterometallic complexes based on Reineckes anion using manganese powder, Reineckes salt and 1-(2-hydroxyethyl)tetrazole as starting materials. The crystal structure of the complex consists of an [Mn(dmf)6]2+ cation and a [Cr(NCS)5(dmf)]2− anion (dmf = dimethylformamide). The MnII and CrIII atoms show a slightly distorted octahedral MnO6 and CrN5O coordination geometries with adjacent angles in the range 85.29 (13)–95.96 (14)°
Dielectric Conductivity of Cross-Linked Polyurethanes Modified with Heteropolynuclear Cu3Mn Complexes
The dielectric and relaxation properties of cross-linked polyurethane, modified with heteropolynuclear Cu3Mn(L4) complexes with various ligands in outer coordination sphere were analyzed by dielectric relaxation spectroscopy. It was shown, that the modifier introduction in polyurethane leads to conductivity level increasing due to: i) complex formation between functional groups of polyurethane and heteropolynuclear compounds and ii) increase in the macrochain mobility
Hexakis(dimethylformamide-κO)manganese(II) μ-oxido-bis[trichloridoferrate(III)]
The title compound, [Mn(C3H7NO)6][Fe2Cl6O], was obtained unintentionally as a product of an attempted synthesis of heterometallic complexes with Schiff base ligands using manganese powder and FeCl3·6H2O as starting materials. In the [Fe2OCl6]2− anion, the O atom and the Fe atom occupy positions with site symmetry and 3, respectively, resulting in a linear Fe—O—Fe angle and a staggered conformation. The octahedrally surrounded cation (site symmetry ) and the [Fe2Cl6O]2− anion are alternately stacked along [001]
Синтез и строение тетразолсодержащих оснований Шиффа
A method for synthesis of tetrazole containing Schiff bases, the promising chelating agents, has been developed. The method is based on salicylic aldehyde reaction with N-substituted 5-aminotetrazoles. The prepared Schiff bases have been characterized by NMR and IR spectroscopy. The electron and molecular structure of compounds synthesized have been also studied by quantum-chemical calculations.На основе N-замещенных 5-аминотетразолов и салицилового альдегида разработаны простые методы получения тетразолсодержащих оснований Шиффа - перспективных хелатирующих лигандов в реакциях комплексообразования с ионами металлов. С использованием методов ЯМР- и ИК-спектроскопии, а также квантовохимических расчетов изучены состав и некоторые физико-химические характеристики полученных соединений