Bis[2-(hy­droxy­imino­meth­yl)phenolato]nickel(II): a second monoclinic polymorph

The title compound, [Ni(C7H6NO2)2], (I), is a second monoclinic polymorph of the compound, (II), reported by Srivastava et al. [Acta Cryst. (1967), 22, 922] and Mereiter [Private communication (2002) CCDC refcode NISALO01]. The bond lengths and angles are similar in both structures. The mol­ecule in both structures lies on a crystallographic inversion center and both have an inter­nal hydrogen bond. The title compound crystallizes in the space group P21/c (Z = 2), whereas compound (II) is in the space group P21/n (Z = 2) with a similar cell volume but different cell parameters. In both polymorphs, mol­ecules are arranged in the layers but in contrast to the previously published compound (II) where the dihedral angle between the layers is 86.3°, in the title polymorph the same dihedral angle is 29.4°. The structure of (I) is stabilized by strong intra­molecular O—H⋯O hydrogen bonding between the O—H group and the phenolate O atom

Diaqua­bis­(propane-1,3-diamine)­nickel(II) bis­(propane-1,3-diamine)­disulfato­nickelate(II)

The ionic NiII title complex, [Ni(C3H10N2)2(H2O)2][Ni(SO4)2(C3H10N2)2], is built up of [Ni(dipr)2(H2O)2]2+ complex cations and [Ni(dipr)2(SO4)2]2− complex anions (dipr is propane-1,3-diamine). Both NiII atoms display a slightly distorted octa­hedral coordination and are located on inversion centers. There are several types of hydrogen-bonding inter­actions, which connect complex cations and anions into a two-dimensional network parallel to (010). Hydrogen bonds formed by the axially coordinated water mol­ecule of the complex cation and one of the O atoms of the sulfate groups of the complex anion (first type) link them into chains along the c axis. These chains are linked to each other through hydrogen bonds formed by an O atom (second type) of the SO4 groups and NH2 groups of the ligand of the complex cations from neighboring chains, forming a two-dimensional hydrogen-bonded net perpendicular to the b axis. The third type of O atoms of the sulfate groups of the complex anion are also linked into chains by a combination of both previously described types of H-atom connections

Diaqua­bis­(propane-1,3-diamine)­copper(II) bis­[diamminetetra­kis­(thio­cyanato-κN)chromate(III)] dimethyl sulfoxide octa­solvate

The ionic title complex, [Cu(C3H10N2)2(H2O)2][Cr(NCS)4(NH3)2]·8C2H6OS, consists of complex [Cu(dipr)2(H2O)2]2+ copper cations (dipr is propane-1,3-diamine), complex [Cr(NCS)4(NH3)2]− anions and uncoord­inated solvent dimethyl sulfoxide (DMSO) mol­ecules. All the metal atoms lie on crystallographic centers of symmetry. The cations are connected to the anions through N—H⋯O hydrogen bonds between the NH3 mol­ecules of the anion and the water mol­ecules of the cation. The DMSO mol­ecules are involved in hydrogen-bonded linkage of the [Cr(NCS)4(NH3)2]− anions into supra­molecular chains through bridging O atoms. A network of hydrogen bonds as well as short S⋯S contacts [3.5159 (12) and 3.4880 (12) Å] between the NCS groups of the complex anions link the mol­ecules into a three-dimensional supra­molecular network

Crystal structure of bis(μ2-4-bromo-2-[({2-[({2-[(5-bromo-2-oxidobenzylidene)amino]ethyl}sulfanyl)sulfonyl]ethyl}imino)methyl]phenolato)dicopper(II) dimethylformamide disolvate

The title dinuclear copper(II) complex [Cu2(C18H16Br2N2O4S2)2] was prepared by direct synthesis of a dianionic Schiff base derived from 5-bromosalicylaldehyde and cysteamine. The discrete molecules lie across inversion centers and crystallize with two dimethylformamide (DMF) molecules of crystallization. The unique CuII ion is four-coordinated by two tetradentate Schiff base ligands in a distorted square-planar N2O2 environment. In the crystal, short intermolecular S...Br contacts, weak C—H...O hydrogen bonds and intra- and intermolecular π–π stacking interactions between rings of the ligand link the components into a two-dimensional network parallel to (010)

Bis{μ-2,2′-[(3,4-dithiahexane-1,6-diyl)bis(nitrilomethanylylidene)]bis(4-bromophenolato)-κ4O,N,N′,O′}dicopper(II)

The crystal structure of the title compound, [Cu2(C18H12Br2N4O2S2)2], consists of binuclear complex units which lie across inversion centres and are connected by weak Cu—O coordination bonds forming chains along the b axis. The CuII ion is five-coordinated by two N atoms and two O atoms of the chelating ligand and one symmetry-related O atom forming a square-pyramidal coordination geometry. In the crystal, short S...Br contacts connect neighbouring chains into a two-dimensional network parallel to (101)

Tris(μ2-2-methoxy-6-{[(2-sulfidoethyl)imino]methyl}phenolato)trinickel(II) dimethylformamide monosolvate: crystal structure, spectroscopic characterization and antibacterial activity

The title trinuclear nickel(II) complex, [Ni3(C10H11NO2S)3]·C3H7NO, with a Schiff base ligand formed in situ from 2-aminoethanethiol and o-vanillin crystallizes in the orthorhombic space group Pbca. Its asymmetric unit consists of one neutral Ni3L3 molecule and one DMF solvent molecule. The solid-state organization of the complex can be described as an insertion of the solvent molecules within the crystallographically independent trinuclear NiII species. Several C—H...π edge-to-face interactions and π–π stacking interactions link the components in the crystal. A first example of a short intermolecular C—H...Ni contact is found. Antibacterial in vitro screening revealed that the title compound has antibacterial activity, the best effect being against Acinetobacter baumannii

Bis[chloridobis(1,10-phenanthroline)copper(II)] pentacyanidonitrosoferrate(II) dimethylformamide monosolvate

The title complex [CuCl(C12H8N2)2]2[Fe(CN)5(NO)]·C3H7NO, consists of discrete [Cu(phen)2Cl]+ cations (phen is 1,10-phenanthroline), [Fe(CN)5NO]2− anions and one dimethylformamide (DMF) solvent molecule of crystallization per asymmetric unit. The CuII atom is coordinated by two phenanthroline ligands and one chloride ion in a distorted trigonal–bipyramidal geometry. The dihedral angle between the phen ligands is 77.92 (7)°. The cation charge is balanced by a disordered nitroprusside counter-anion with the FeII atom located on an inversion center with a slightly distorted octahedral coordination geometry. In the crystal, weak C—H...N and C—H...Cl hydrogen bonds connect anions and cations into a two-dimensional network parallel to (100). In addition, π–π stacking interactions are observed with centroid–centroid distances in the range 3.565 (2)–3.760 (3)Å. The dimethylformamide solvent molecule was refined as disordered about an inversion center

Crystal structure of tetrakis[μ2-2-(dimethylamino)ethanolato-κ3N,O:O]di-μ3-hydroxido-dithiocyanato-κ2N-dichromium(III)dilead(II) dithiocyanate acetonitrile monosolvate

The tetranuclear complex cation of the title compound, [Cr2Pb2(NCS)2(OH)2(C4H10NO)4](SCN)2·CH3CN, lies on an inversion centre. The main structural feature of the cation is a distorted seco-norcubane Pb2Cr2O6 cage with a central four-membered Cr2O2 ring. The CrIII ion is coordinated in a distorted octahedron, which involves two N atoms of one bidentate ligand and one thiocyanate anion, two μ2-O atoms of 2-(dimethylamino)ethanolate ligands and two μ3-O atoms of hydroxide ions. The coordination geometry of the PbII ion is a distorted disphenoid, which involves one N atom, two μ2-O atoms and one μ3-O atom. In addition, weak Pb...S interactions involving the coordinating and non-coordinating thiocyanate anions are observed. In the crystal, the complex cations are linked through the thiocyanate anions via the Pb...S interactions and O—H...N hydrogen bonds into chains along the c axis. The chains are further linked together via S...S contacts. The contribution of the disordered solvent acetonitrile molecule was removed with the SQUEEZE [Spek (2015). Acta Cryst. C71, 9–18] procedure in PLATON. The solvent is included in the reported molecular formula, weight and density