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Crystal structure of aqua-chlorido-(nitrato-κ2O,O')[1-(pyridin-2-yl-κN)-2-(pyridin-2-yl-methyl-idene-κN)hydrazine-κN2]manganase(II).

ABSTRACT: The search for novel manganese(II) compounds having inter-esting magnetic properties, using 1-(pyridin-2-yl)-2-(pyridin-2-yl-methyl-idene)hydrazine (HL) as a tridendate ligand, led to the preparation of the title mononuclear material, [MnCl(NO3)(C11H10N4)(H2O)], and the determination of its structure by XRD. The asymmetric unit comprises a discrete mol-ecule in which the cation MnII is hepta-coordinated. The environment around the cation is an almost perfect penta-gonal bipyramid. The base is defined by the two N atoms of the pyridine rings, the N atom of the imino function of the ligand and the two O atoms of the chelating bidentate nitrate ligand. The apical positions are occupied by a Cl atom and a water mol-ecule. In the crystal, there are numerous hydrogen bonds of the types Ow-H⋯ONO2 and C-H⋯ONO2, which generate layers parallel to the bc plane in which the ligands in the axial positions point into the inter-layer space. These axial ligands give rise to hydrogen bonds of the types Ow-H⋯ONO2, Ow-H⋯Cl, N-H⋯Cl and C-H⋯Cl, leading to a three-dimensional framework. The chain bridging the two pyridine rings is disordered over two sets of sites in a 0.53 (2):0.47 (2) ratio.

SUBMITTER: Sarr M

PROVIDER: S-EPMC5946965 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Crystal structure of bis-(acetato-κ2O,O')di-aqua-[1-(pyridin-2-yl-methyl-idene-κN)-2-(pyridin-2-yl-κN)hydrazine-κN1]terbium(III) nitrate monohydrate.

Project description:In the title compound, [Tb(C2H3O2)2(C11H10N4)(H2O)2]NO3·H2O, the Tb3+ ion is nine-coordinated in a distorted tricapped trigonal-prismatic geometry by the three N atoms of the tridentate 1-(pyridin-2-yl-methyl-idene)-2-(pyridin-2-yl)hydrazine ligand, four carboxyl-ate O atoms of two chelating acetate groups and two O atoms of the coordinating water mol-ecules. The organic hydrazine ligand is disordered over two orientations with a refined occupancy ratio of 0.52 (3):0.48 (3). All bond lengths in the coordination environment of the Tb3+ ion are slightly larger than those observed in the isostructural Y3+ and Er3+ complexes. In the crystal, the complex cations are linked by pairs of O-H⋯O hydrogen bonds into dimers. These dimers, nitrate anions and non-coordinating water mol-ecules are joined by O-H⋯O and N-H⋯O hydrogen bonds into a three-dimensional structure.

| S-EPMC5598831 | biostudies-literature

Bis[?-1-(3,5-di-chloro-pyridin-2-yl)-2-(pyridin-3-yl-methyl-idene)hydrazine]bis-[(nitrato-?O)silver(I)] aceto-nitrile disolvate.

Project description:In the centrosymmetric binuclear title complex, [Ag2(NO3)2(C11H8Cl2N4)2]·2CH3CN, the Ag(I) atom is four-coordinated and exhibits a highly distorted tetrahedral coordination sphere defined by three N atoms from two 1-(3,5-di-chloro-pyridin-2-yl)-2-(pyridin-3-yl-methyl-idene)hy-drazine ligands and one O atom from a nitrate anion. Inter-molecular N-H?O hydrogen bonds link the complex mol-ecules, resulting in a two-dimensional supra-molecular structure parallel to (001).

| S-EPMC3790340 | biostudies-literature

Di-aqua-bis-{μ-1,5-bis-[(pyridin-2-yl)methyl-idene]carbonohydrazide(1-)}di-μ-chlorido-tetra-chlorido-tetra-zinc(II).

Project description:A tetra-nuclear ZnII complex, [Zn4(C13H11N6O)2Cl6(H2O)2] or {[Zn2(HL)(H2O)(Cl2)](μCl)2[Zn2(HL)(H2O)(Cl)]}2, was synthesized by mixing an equimolar amount of a methanol solution containing ZnCl2 and a methanol solution containing the ligand H2 L [1,5-bis-(pyridin-2-yl-methyl-ene)carbono-hydrazide]. In the tetra-nuclear complex, each of the two ligand mol-ecules forms a dinuclear unit that is connected to another dinuclear unit by two bridging chloride anions. In each dinuclear unit, one ZnII cation is penta-coordinated in a N2OCl2 in a distorted square-pyramidal geometry, while the other ZnII cation is hexa-coordinated in a N3OCl2 environment with a distorted octa-hedral geometry. The basal plane around the penta-coordinated ZnII cation is formed by one chloride anion, one oxygen atom, one imino nitro-gen atom and one pyridine nitro-gen atom with the apical position occupied by a chloride anion. The basal plane of the hexa-coordinated ZnII cation is formed by one chloride anion, one hydrazinyl nitro-gen atom, one imino nitro-gen atom and one pyridine nitro-gen atom with the apical positions occupied by a water oxygen atom and a bridged chloro anion from another dinuclear unit, leading to a tetra-nuclear complex. A series of intra-molecular C-H⋯Cl hydrogen bonds is observed in each tetra-nuclear unit. In the crystal, the tetra-nuclear units are connected by inter-molecular C-H⋯Cl, C-H⋯O and N-H⋯O hydrogen bonds, forming a planar two-dimensional structure in the ac plane.

| S-EPMC7405581 | biostudies-literature

{1-[1-(2-Hy-droxy-phen-yl)ethyl-idene]-2-(pyridin-2-yl-κN)hydrazine-κ2N',O}{1-[1-(2-oxidophen-yl)ethyl-idene]-2-(pyridin-2-yl-κN)hydrazine-κ2N',O}nickelate(II) nitrate hemihydrate.

Project description:The 2-hydrazino-pyridine precursor has been widely used to prepare ligands of various kinds by condensation with carbonyl compounds. These types of ligands are suitable for synthesizing novel transition metal (II) complexes with inter-esting magnetic properties. In this context we have synthesized the ligand 1-(2-hy-droxy-phenyl-2-ethyl-idene)-2-(pyridin-2-yl)hydrazine (HL) which was used in the preparation of the mononuclear title complex, [Ni(C13H12N3O)(C13H13N3O)]NO3·0.5H2O. As a result of the presence of HL and L in the [{Ni(HL)(L)}]+ unit, the complex appears to be a supramolecular dimer composed of the Δ(-) and Λ(-) optical isomers, which are linked by strong hydrogen-bonds. As well as the dimer generated by two mononuclear [{Ni(HL)(L)}]+ cations, the asymmetric unit also contains two nitrate anions and one water mol-ecule. Each Ni atom is coordinated to two ligand mol-ecules by a nitro-gen atom of the pyridine ring, an imine nitro-gen atom and a phenolic oxygen atom of one of the ligand mol-ecules and a phenolate oxygen atom of the other organic mol-ecules. The environment around the cation is a distorted octa-hedron. The basal planes are defined by the two nitro-gen atoms of the pyridine rings and the two phenolic oxygen atoms of the ligand, the apical positions being occupied by the azomethine atoms. The O atoms of one of the nitrate ions are disordered over two sets of sites in a 0.745 (9):0.255 (9) ratio. In the crystal, the dimers are linked by numerous hydrogen bonds, forming a three-dimensional framework.

| S-EPMC5947478 | biostudies-literature

Crystal structure of {N-[(6-bromo-pyridin-2-yl)(phen-yl)methyl-idene]-2,6-di-methyl-aniline-κ2N,N'}di-chlorido-zinc di-chloro-methane hemisolvate.

Project description:The solvated title compound, [ZnCl2(C20H17BrN2)]·0.5CH2Cl2, comprises a bidentate imino-pyridine ligand and two Cl atoms bound to a zinc2+ cation in a distorted tetra-hedral arrangement. The chelate bond lengths are consistent with localized C=N double bonds and a C-C single bond, as expected for an unreduced ligand bound to a closed-shell transition metal cation. Apart from weak nonclassical C-H⋯Cl hydrogen bonds between the complex mol-ecules and the disordered solvent mol-ecules (occupancy = 0.5), no further significant inter-molecular inter-actions are observed.

| S-EPMC5499262 | biostudies-literature

Di-?-chlorido-bis-(chlorido-{N'-[phen-yl(pyridin-2-yl-?N)methyl-idene]pyridine-2-carbohydrazide-?(2) N',O}cadmium).

Project description:The title compound, [Cd2Cl4(C18H14N4O)2], was obtained from the reaction of Cd(NO3)2·4H2O with 2-phenyl-pyridine-keton picolinoyl hydrazone and sodium chloride. Each Cd(2+) cation is coordinated by two N atoms and one O atom of the tridentate ligand and three chloride anions, forming a distorted CdNOCl3 octahedron. Each pair of adjacent metal cations is linked by two bridging chloride ligands, resulting in a dinuclear complex unit. The mol-ecular conformation is stabilized by intra-molecular N-H?N and C-H?O hydrogen bonds. In the crystal, mol-ecules are linked by nonclassical C-H?O and C-H?Cl hydrogen bonds into a three-dimensional network. In addition, ?-? stacking inter-actions [centroid-centroid distances = 3.777?(2) and 3.631?(2)?Å] contribute to the stabilization of the crystal packing.

| S-EPMC4051065 | biostudies-literature

Crystal structure of trans-bis-{4-bromo-N-[(pyridin-2-yl)-methyl-idene]aniline-κ(2) N,N'}di-chlorido-ruthenium(II).

Project description:In the title complex, [RuCl2(C12H9BrN2)2] or [RuCl2(PM-BrA)2] (PM-BrA = 4-bromo-N-(2'-pyridyl-methyl-ene)aniline), the Ru(II) cation is located on a centre of inversion and is surrounded by four N atoms of two PM-BrA ligands in the equatorial plane and by two Cl atoms in a trans axial arrangement, displaying a distorted octa-hedral coordination environment. Two C atoms in the benzene ring of the PM-BrA ligand are equally disordered over two sets of sites. The benzene and pyridine rings of the PM-BrA ligand are oriented at dihedral angles of 62.1 (10) and 73.7 (11)° under consideration of the two orientations of the disordered benzene ring. In the crystal, the complex mol-ecules are connected via C-H⋯Cl hydrogen-bonding inter-actions into a layered arrangement parallel (100). C-H⋯Br hydrogen bonding and weak aromatic π-π stacking inter-actions complete a three-dimensional supra-molecular network.

| S-EPMC4555422 | biostudies-literature

Crystal structure of di-μ-chlorido-bis-(chlorido-{N1,N1-diethyl-N4-[(pyridin-2-yl-κN)methyl-idene]benzene-1,4-di-amine-κN4}mercury(II)).

Project description:The title dinuclear mercury(II) complex, [Hg2Cl4(C16H19N3)2], synthesized from the pyridine-derived Schiff base (E)-N1,N1-diethyl-N4-[(pyridin-2-yl)methyl-idene]benzene-1,4-di-amine (DPMBD), has inversion symmetry. The five-coordinated HgII atoms have distorted square-pyramidal stereochemistry comprising two N-atom donors from bidentate chelate BPMBD ligands and three Cl-atom donors, two bridging and one monodentate. The dihedral angle between the benzene and the pyridine rings in the BPMBD ligand is 7.55 (4)°. In the crystal, the dinuclear mol-ecules are linked by weak C-H⋯Cl hydrogen bonds, forming zigzag ribbons lying parallel to [001]. Also present in the structure are π-π inter-actions between benzene and pyridine rings [minimum ring-centroid separation = 3.698 (8) Å].

| S-EPMC5458297 | biostudies-literature

Di-μ-chlorido-bis-{chlorido[4-nitro-N-(pyridin-2-yl-methyl-idene-κN)aniline-κN]mercury(II)}.

Project description:In the centrosymmetric dinuclear title complex, [Hg(2)Cl(4)(C(12)H(9)N(3)O(2))(2)], the Hg(II) ion is in a distorted square-pyramidal coordination environment formed by the N atoms of the diimine ligand, two bridging Cl atoms and one terminal Cl atom. One of the bridging Hg-Cl bonds is significantly longer than the other.

| S-EPMC3051965 | biostudies-literature

[Aqua-bis-(nitrato-κO)copper(II)]-μ-{bis-[5-methyl-3-(pyridin-2-yl)-1H-pyrazol-4-yl]selenide}-[diaqua-(nitrato-κO)copper(II)] nitrate monohydrate.

Project description:In the title binuclear complex, [Cu2(NO3)3(C18H16N6Se)(H2O)3]NO3·H2O, the Cu(II) ions are penta-coordinated in a tetra-gonal-pyramidal geometry. In both cases, the equatorial planes are formed by a chelating pyrazole-pyridine group, a water mol-ecule and a nitrate O atom, whereas the apical positions are occupied by a water mol-ecule for one Cu(II) ion and a nitrate O atom for the other. The organic selenide ligand adopts a trans configuration with respect to the C-Se-C plane. Numerous inter-molecular O-H⋯O and N-H⋯O hydrogen bonds between the coordinating and lattice water mol-ecules, nitrate anions and pyrazole groups are observed. π-π stacking inter-actions between the pyridine rings [averaged centroid-centroid distance = 3.652 (5) Å] are also present. The lattice water molecule is equally disordered over two sets of sites.

| S-EPMC3588734 | biostudies-literature

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