Tetra­aqua­bis[μ-N-(5-nitro-2-oxido­benzyl­idene)glycylglycinato]manganese(II)dinickel(II) tetra­hydrate

The two unique NiII atoms of the title complex, [MnNi2(C11H8N3O6)2(H2O)4]·4H2O, have a slightly distorted square-planar coordination environment with a tetra­dentate N-(5-nitro-2-oxidobenzyl­idene)glycylglycinate Schiff base trianion. The NiII atoms are coordinated by one phenolate O atom, one imine N atom, one amido N atom and one carboxyl­ate O atom. The MnII atom is connected via the carboxyl­ate groups, forming a hetero-trinuclear NiII–MnII–NiII system. The MnII atom is six-coordinated in an octa­hedral geometry by four O atoms from two carboxyl­ate groups and four water mol­ecules. The NiII–MnII–NiII hetero-trinuclear mol­ecules are stacked in the crystal and cross-linked through O—H⋯O hydrogen bonds

Hexaaqua­manganese(II) bis­{[N-(3-meth­oxy-2-oxidobenzyl­idene)glycylglycinato]copper(II)} hexa­hydrate

The ligand N-(2-hydr­oxy-3-methoxy­benzyl­idene)glycylglycine (H3 L), a Schiff base derived from glycylglycine and 3-methoxy­salicylaldehyde, was used in the synthesis of a new organic–inorganic coordination complex, [Mn(H2O)6][Cu(C12H11N2O5)]2·6H2O. The MnII atom is located on an inversion center and is coordinated to six water mol­ecules in a slightly distorted octa­hedral geometry. The CuII atom is chelated by the tetra­dentate Schiff base ligand in a distorted CuN2O2 square-planar coordination. In the crystal structure, the complex [Mn(H2O)6]2+ cations and the [CuL]− anions are arranged in columns parallel to the a axis and are held together by O—H⋯O hydrogen bonding. Additional hydrogen bonds of the same type further link the columns into a three-dimensional network

(2-{[2-Carboxyl­ato-1-(4-chloro­phen­yl)eth­yl]imino­meth­yl}phenolato-κ3 O,N,O′)(1H-imidazole-κN 3)copper(II) monohydrate

The CuII atom of the title complex, [Cu(C16H12ClNO3)(C3H4N2)]·H2O, has a distorted square-planar coordination geometry formed by a tridentate Schiff base dianion and an imidazole ligand. The imidazole is nearly coplanar with the coordination plane, the dihedral angle between the planes being 3.73 (12)°. In the Schiff base ligand, the two benzene rings are oriented at a dihedral angle of 75.87 (12)°. O—H⋯O and N—H⋯O hydrogen bonding is present in the crystal structure. One H atom of the uncoordinated water mol­ecule is disordered equally over two sites

Structure cristalline du composé d'addition CoCl2, 4CH3OH

The crystal structure of CoCl₂, 4CH₃OH has been determined by X˗ray single-crystal methods. The unit cell is monoclinic with a = 7.91 Å, b = 7.06 Å, c = 10.07 Å and ß = 101.3°. The space group is P2₁/c and the unit cell contains two molecules. Two Cl˗ions and four methanol molecules are octahedrally coordinated to Co²⁺ ion, to form the group [CoCl₂. 4CH₃OH]. These groups are held together by O˗H...Cl type hydrogen bonds and form layers parallel to (100). Anisotropic thermal motion was considered for cobalt and chlorine atoms.La structure cristalline de CoCl₂, 4CH₃OH montre une coordination octaédrique du cobalt, entouré de deux ions chlore et de quatre molécules de méthanol. Les octaèdres irréguliers [CoCl₂, 4CH₃OH] sont maintenus entre eux par liaisons O˗H...Cl, de manière à former des couches parallèles à (100). L'agitation thermique anisotrope du cobalt et du chlore a été considérée.Bkouche-Waksman Itka. Structure cristalline du composé d'addition CoCl2, 4CH3OH. In: Bulletin de la Société française de Minéralogie et de Cristallographie, volume 90, 2, 1967. pp. 151-157

Structure comparée du composé CoCl2, 4CH3OH et des solvates d'halogénures de métaux divalents

The determination of the crystal structure of CoCl₂.4CH₃OH allows a comparison of this solvated compound with order divalent halogenides and shows that there are two principal arrangements of these ions or complex molecules in the crystal.La détermination de la structure cristalline de CoCl₂, 4CH₃OH permet de comparer ce composé de solvatation à ceux d'halogénures divalents et de déduire deux modes principaux d'arrangement de ces ions ou molécules complexes dans le cristal.Brusset Henri, Gillier-Pandraud H., Bkouche-Waksman Itka. Structure comparée du composé CoCl2, 4CH3OH et des solvates d'halogénures de métaux divalents. In: Bulletin de la Société française de Minéralogie et de Cristallographie, volume 91, 6, 1968. Réunion annuelle de l'Association Française de Cristallographie, Toulouse, 18-20 mars 1968