Diaquabis(1 H -imidazole-4-carboxylato-κ 2 N 3 , O )cobalt(II) (original) (raw)
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Diaquabis(1H-imidazole-4-carboxylato-[kappa]2N3,O)cobalt(II)
Acta Crystallographica Section E Structure Reports Online
The title compound, [Co(C4H3N2O2)2(H2O)2], contains a CoII cation on a twofold rotation axis, exhibiting a distorted octahedral coordination geometry. The equatorial plane is formed by two N,O-bidentate 1H-imidazole-4-carboxylate ligands and the axial positions are occupied by water molecules. The crystal packing consists of a three-dimensional network stabilized by O—H⋯O and N—H⋯O hydrogen bonds, together with weak π–π interactions [centroid–centroid distance = 3.577 (2) Å] between the imidazole rings.
Acta Crystallographica Section E Structure Reports Online, 2012
In the title compound, [Co(C8H4O4)(C3H4N2)3(H2O)2]·H2O, thecisoidangles are in the range 85.59 (5)–93.56 (5)°, while two equaltransoidangles deviate significantly from the ideal linear angle, the third being almost linear. One carboxylate group is almost coplanar [1.23 (13)°] with the plane of its parent aromatic ring, although it has one O-atom donor involved in one coordination and one hydrogen bond as acceptor. The other carboxylate group does not coordinate and is rotated out of this plane with a torsional twist of 17.27 (20)°. The coordination neutral entity, based on aqua ligands and two cyclic co-ligands seems, at first sight, monomeric. Strongly tight,viaone intramolecular hydrogen bond between aqua and carboxylate O atoms, it brings out a quasi-planar six-membered ring around the CoIIatom, turning the CoN3O3coordination octahedron into a new building block. The rigidity of this feature associated with several hydrogen-bonded arrays yields an extended structure. In the resul...
Diaquabis(4-methylaminobenzoato-κO)bis(nicotinamide-κN1)cobalt(II)
Acta Crystallographica Section E Structure Reports Online, 2010
The asymmetric unit of the title Co II complex, [Co(C 8 H 8-NO 2) 2 (C 6 H 6 N 2 O) 2 (H 2 O) 2 ], contains two half complex molecules with similar structures. The Co II atoms are each located on an inversion center and each is coordinated by two 4methylaminobenzoate (PMAB), two nicotinamide (NA) ligands and two water molecules in a distorted octahedral coordination. The dihedral angles between the carboxylate groups and the adjacent benzene rings are 3.0 (3) and 2.54 (19) , while the pyridine and benzene rings are oriented at dihedral angles of 67.40 (8) and 66.25 (8). In the crystal structure, intermolecular O-HÁ Á ÁO and N-HÁ Á ÁO hydrogen bonds link the molecules into a supramolecular structure. Symmetry codes: (i) Àx þ 1; Ày þ 1; Àz; (ii) Àx þ 1; Ày þ 1; Àz þ 1; (iii) x; y þ 1; z; (iv) Àx þ 2; Ày þ 2; Àz; (v) Àx þ 2; Ày þ 1; Àz þ 1; (vi) x À 1; y; z.
Diaquabis[4-(dimethylamino)benzoato]-κ 2 O , O ′;κ O -(isonicotinamide-κ N 1 )cobalt(II)
Acta Crystallographica Section E Structure Reports Online, 2009
The title CoII complex, [Co(C9H10NO2)2(C6H6N2O)(H2O)2], contains two 4-dimethylaminobenzoate (DMAB) anions, one isonicotinamide (INA) ligand and two coordinated water molecules. One of the DMAB anions acts as a bidentate ligand, while the other is monodentate. The four O atoms in the equatorial plane around the Co atom form a highly distorted square-planar arrangement, while the distorted octahedral coordination geometry is completed by the N atom of the INA ligand and the O atom of the second water molecule in the axial positions. An intramolecular O—H...O hydrogen bond between the monodentate-coordinated carboxyl group and a coordinated water molecule results in a six-membered ring with an envelope conformation. The dihedral angles between the carboxyl groups and the adjacent benzene rings are 4.29 (10)° for the monodentate ligand and 2.31 (13)° for the bidentate ligand, while the two benzene rings are oriented at a dihedral angle of 65.02 (5)°. The dihedral angles between the pyr...
Diaquabis(4-methylaminobenzoato-κO)bis(nicotinamide-κN1)cobalt(II)
Acta Crystallographica Section E-structure Reports Online, 2010
The asymmetric unit of the title Co II complex, [Co(C 8 H 8-NO 2) 2 (C 6 H 6 N 2 O) 2 (H 2 O) 2 ], contains two half complex molecules with similar structures. The Co II atoms are each located on an inversion center and each is coordinated by two 4methylaminobenzoate (PMAB), two nicotinamide (NA) ligands and two water molecules in a distorted octahedral coordination. The dihedral angles between the carboxylate groups and the adjacent benzene rings are 3.0 (3) and 2.54 (19) , while the pyridine and benzene rings are oriented at dihedral angles of 67.40 (8) and 66.25 (8). In the crystal structure, intermolecular O-HÁ Á ÁO and N-HÁ Á ÁO hydrogen bonds link the molecules into a supramolecular structure. Symmetry codes: (i) Àx þ 1; Ày þ 1; Àz; (ii) Àx þ 1; Ày þ 1; Àz þ 1; (iii) x; y þ 1; z; (iv) Àx þ 2; Ày þ 2; Àz; (v) Àx þ 2; Ày þ 1; Àz þ 1; (vi) x À 1; y; z.
Analytical Sciences: X-ray Structure Analysis Online, 2008
The title compound [Co(C7H4O2I)2(C10H14N2O)2(H2O)2] is a two-dimensional hydrogen-bonded supramolecular complex. The complex crystallizes in the triclinic space group P1 with unit-cell parameters a = 7.2964(13), b = 8.6047(17), c = 16.745(3)Å, a = 93.034(15), b = 101.574(15), g = 111.975(14)˚ and Z = 1. The Co(II) ion resides on a centre of symmetry, and is in an octahedral coordination environment comprising two pyridyl N atoms, two carboxylate O atoms and two O atoms from water molecules. Intermolecular C-H•O and O-H•O hydrogen bonds produce R2 2 (16), R2 2 (18) and R2 2 (20) rings, which lead to one-dimensional polymeric chains. An extensive two-dimensional network of C-H•O and O-H•O hydrogen bonds, p-p and C-H•p interactions are responsible for crystal stabilization.
trans -Diaquabis(pyridazine-3-carboxylato-κ 2 N 2 , O )cobalt(II) dihydrate
Acta Crystallographica Section E Structure Reports Online, 2013
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Structural characterization of a new cobalt(II) complex of 1-benzyl-5-methyl-1H-imidazole
Journal of Structural Chemistry, 2016
The preparation of a cobalt(II) chloride complex with a N-donor ligand 1-benzyl-5-methyl-1H-imidazole of formula [CoCl 2 (1-benzyl-5-methyl-1H-imidazole) 2 ] is described. The isolated complex was characterized by UV, IR spectroscopy and crystallographic studies. Single crystal X-ray diffraction analysis of the complex reveals its monomeric tetra-coordinated nature. The coordination polyhedron around the cobalt center can be described as a quasi-regular tetrahedron. The CoN distances for this compound are 2.0111(17) Å and 2.0118(17) Å, while the Co-Cl distances are 2.2582(7) Å and 2.2549(7) Å. The crystal packing can be described as layers parallel to (101) plane alternating along the b axis, and it is stabilized by π-π stacking between the imidazole and phenyl rings. The shortest centroid-centroid distance is 3.6002(14) Å.