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Bis(pyrimidine-2-carboxyl-ato-κN,O)copper(II).

ABSTRACT: The title compound, [Cu(C(5)H(3)N(2)O(2))(2)], was prepared in a water-ethanol solution containing 2-cyano-pyrimidine, malonic acid and copper(II) nitrate trihydrate. The Cu(II) ion, located on an inversion center, is chelated by two pyrimidine-2-carboxyl-ate anions in a CuO(2)N(2) square-planar geometry. The uncoordinated carboxyl-ate O atom and pyrimidine N atoms are linked to adjacent pyrimidine rings via weak C-H⋯O and C-H⋯N hydrogen bonding. π-π Stacking is observed between nearly parallel pyrimidine rings, the centroid-to-centroid separation being 3.8605 (13) Å.

SUBMITTER: Zhang BY

PROVIDER: S-EPMC2914890 | biostudies-literature | 2007 Dec

REPOSITORIES: biostudies-literature

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Bis(pyrimidine-2-carboxyl-ato-κN,O)copper(II).

Zhang Bing-Yu BY Yang Qian Q Nie Jing-Jing JJ

Acta crystallographica. Section E, Structure reports online 20071206 Pt 1

The title compound, [Cu(C(5)H(3)N(2)O(2))(2)], was prepared in a water-ethanol solution containing 2-cyano-pyrimidine, malonic acid and copper(II) nitrate trihydrate. The Cu(II) ion, located on an inversion center, is chelated by two pyrimidine-2-carboxyl-ate anions in a CuO(2)N(2) square-planar geometry. The uncoordinated carboxyl-ate O atom and pyrimidine N atoms are linked to adjacent pyrimidine rings via weak C-H⋯O and C-H⋯N hydrogen bonding. π-π Stacking is observed between nearly parallel ...[more]

PMID: 21200639

Similar Datasets

A polymorph of diaqua-bis(pyrazine-2-carboxyl-ato-κN,O)copper(II).

Project description:The title compound, [Cu(C(5)H(3)N(2)O(2))(2)(H(2)O)(2)], is a new polymorph of the previously reported compound [Klein et al. (1982 ▶). Inorg. Chem.21, 1891-1897]. The Cu(II) atom, lying on an inversion center, is coordinated by two N atoms and two O atoms from two pyrazine-2-carboxyl-ate ligands and by two water mol-ecules in a distorted octa-hedral geometry with the water mol-ecules occupying the axial sites. Inter-molecular O-H⋯O, O-H⋯N and C-H⋯O hydrogen bonds connect the complex mol-ecules into a two-dimensional layer parallel to (10), whereas the previously reported polymorph exhibits a three-dimensional hydrogen-bonded network.

| S-EPMC2971785 | biostudies-literature

Aqua-(2,2'-bipyridine-κN,N')bis-(thio-phene-2-carboxyl-ato-κO)copper(II).

Project description:In the title complex, [Cu(C(5)H(3)O(2)S)(2)(C(10)H(8)N(2))(H(2)O)], the Cu(II) atom is in a distorted square-pyramidal environment, with an Addison τ parameter of 0.07. The coordination geometry is defined by two nitro-gen donors from the 2,2'-bipyridine ligand, two O atoms from two monodentate thio-phene-2-carboxyl-ate ligands and one O atom from the aqua ligand. The latter occupies the elongated apical position. This is different from the related structure of aqua-(1,10-phenanthroline)bis-(thio-phene-2-carboxyl-ato)copper(II) where a carboxyl-ate O atom is in the apical position [Feng et al. (2005 ▶). Z. Kristallogr. New Cryst. Struct.220, 429-430]. The uncoordinated carboxyl-ate O atoms form intra- and inter-molecular hydrogen bonds to the aqua ligand. Two neighbouring 2,2'-bipyridine ligands form a π-stack, with a centroid-centroid distance of 3.683 (2) Å.

| S-EPMC2977207 | biostudies-literature

Bis(quinoline-2-carboxyl-ato-κN,O)lead(II).

Project description:The Pb(II) atom in the title compound, [Pb(C(10)H(6)NO(2))(2)], is N,O-chelated by two quinoline-2-carboxyl-ate anions in a distorted Ψ-trigonal-bipyramidal environment; four atoms are connected to the Pb(II) atom by regular coordination bonds. The structure also features two somewhat long Pb⋯O inter-actions [2.952 (3) and 3.014 (3) Å]. These long inter-actions give rise to a layer coordination polymer having the lead atom in a distorted Ψ-monocapped octa-hedral geometry.

| S-EPMC3007439 | biostudies-literature

Diaqua-bis-(4-hy-droxy-5-nitro-pyridine-2-carboxyl-ato-κN,O)copper(II).

Project description:In the title compound, [Cu(C(6)H(3)N(2)O(5))(2)(H(2)O)(2)], the Cu(II) ion, lying on an inversion center, is coordinated by two pyridine N atoms and two carboxyl-ate O atoms from symmetry-related two 4-hy-droxy-5-nitro-pyridine-2-carboxyl-ate ligands, and two water mol-ecules, forming a distorted octa-hedral geometry. In the crystal, O-H⋯O hydrogen bonds link the complex mol-ecules. One of the H atoms of the water mol-ecule is disordered over two sites of equal occupancy.

| S-EPMC3254315 | biostudies-literature

Bis(4-carb-oxy-pyridine-2-carboxyl-ato-κN,O)copper(II) dimethyl sulfoxide disolvate.

Project description:In the title complex, [Cu(C(7)H(4)NO(4))(2)]·2C(2)H(6)OS, the Cu(II) atom is situated on an inversion centre and is N,O-chelated by two monoanionic 4-carb-oxy-pyridine-2-carboxyl-ate ligands in a slightly distorted square-planar coordination geometry. The dimethyl sulfoxide solvent mol-ecules and Cu(II) complex mol-ecules are linked by O-H⋯O hydrogen bonding. In addition, C-H⋯O contacts and π-π inter-actions [centroid-centroid distance = 3.590 (1) Å] occur.

| S-EPMC3051791 | biostudies-literature

Tetra-aqua-bis-[2-(pyridin-4-yl-κN)pyrimidine-5-carboxyl-ato]zinc.

Project description:In the title complex, [Zn(C(10)H(6)N(3)O(2))(2)(H(2)O)(4)], the Zn(II) ion lies on an inversion center and is coordinated in a slightly distorted octa-hedral geometry by two N atoms from two 2-(pyridin-4-yl)pyrimidine-5-carboxyl-ate ligands and four water mol-ecules. In the symmetry-unique part of the mol-ecule, the pyridine and pyrimidine rings form a dihedral angle of 7.0 (1)°. In the crystal, the coordinating water mol-ecules act as donor groups and carboxyl-ate O atoms act as acceptors in O-H⋯O hydrogen bonds, forming a three-dimensional network.

| S-EPMC3515163 | biostudies-literature

Diaqua-bis(pyridine-2-carboxyl-ato-κN,O)cobalt(II).

Project description:In the mol-ecule of the title compound, [Co(C(6)H(4)NO(2))(2)(H(2)O)(2)], the coordination environment around the Co(II) atom is distorted octahedral; two N and two O atoms of the pyridine-2-carboxylate ligands lie in the equatorial plane and the two water O atoms in the axial positions. In the crystal structure, inter-molecular O-H⋯O hydrogen bonds link the mol-ecules, forming a supra-moleular network structure.

| S-EPMC2961307 | biostudies-literature

Diaqua-bis(pyridine-2-carboxyl-ato-κN,O)iron(II).

Project description:The Fe(II) atom in the title complex, [Fe(C(6)H(4)NO(2))(2)(H(2)O)(2)], exists in a distorted octa-hedral coordination geometry defined by two O and two N atoms from two pyridine-2-carboxyl-ate ligands and two O atoms of two water mol-ecules. In the crystal structure, mol-ecules are linked into a three-dimensional framework by O-H⋯O hydrogen bonds.

| S-EPMC2968519 | biostudies-literature

Poly[[bis-(μ(2)-6-methyl-pyrazin-2-carboxyl-ato-κN,O:N)copper(II)] dihydrate].

Project description:In the title compound, {[Cu(C(6)H(5)N(2)O(2))(2)]·2H(2)O}(n), the Cu(II) ion (site symmetry ) is coordinated by two N,O-bidentate ligands and two N-monodentate ligands in a distorted CuO(2)N(4) octa-hedral geometry. Each anion acts as a bridge between two cations, thus forming a two-dimensional polymeric network parallel to the ab plane. The packing is consolidated by O-H⋯O hydrogen bonds. One of the O atoms of the ligand and both water mol-ecules are disordered.

| S-EPMC2971155 | biostudies-literature

trans-Bis(5-carb-oxy-2-methyl-1H-imidazole-4-carboxyl-ato-κN,O)copper(II).

Project description:In the title compound, [Cu(C(6)H(5)N(2)O(4))(2)], the copper(II) atom lies on an inversion centre and is in an N(2)O(2) four-coordinate environment with a nearly regular square-planar geometry. An extended network of intra-molecular O-H⋯O and inter-molecular N-H⋯O and C-H⋯O hydrogen bonds stabil-izes the crystal structure.

| S-EPMC2969817 | biostudies-literature

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