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[3-Chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinato](pyridine-2,6-dicarboxyl-ato)nickel(II) dihydrate.

ABSTRACT: In the title compound, [Ni(C(11)H(9)ClN(3)O(2))(C(7)H(3)NO(4))]·2H(2)O, the Ni(II) atom is coordinated by two N atoms and one O atom of 3-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinate and by one N atom and two O atoms of pyridine-2,6-dicarboxyl-ate in a distorted octa-hedral coordination. In the crystal structure, mol-ecules are linked together by inter-molecular O-H?O hydrogen bonds. One water mol-ecule is disordered over two positions; the site occupancies are ca 0.53 and 0.47.

SUBMITTER: Feng Y

PROVIDER: S-EPMC2915123 | biostudies-literature | 2007 Dec

REPOSITORIES: biostudies-literature

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[3-Chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinato](pyridine-2,6-dicarboxyl-ato)nickel(II) dihydrate.

Feng Yu Y Zhao Kai K Yin Xian-Hong XH Zhu Jie J Lin Cui-Wu CW

Acta crystallographica. Section E, Structure reports online 20071218 Pt 1

In the title compound, [Ni(C(11)H(9)ClN(3)O(2))(C(7)H(3)NO(4))]·2H(2)O, the Ni(II) atom is coordinated by two N atoms and one O atom of 3-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinate and by one N atom and two O atoms of pyridine-2,6-dicarboxyl-ate in a distorted octa-hedral coordination. In the crystal structure, mol-ecules are linked together by inter-molecular O-H⋯O hydrogen bonds. One water mol-ecule is disordered over two positions; the site occupancies are ca 0.53 and 0.47. ...[more]

PMID: 21200539

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[6-(3,5-Dimethyl-1H-pyrazol-1-yl)picolinato](pyridine-2,6-dicarboxyl-ato)copper(II) dihydrate.

Project description:In the title complex, [Cu(C(7)H(4)NO(4))(C(11)H(10)N(3)O(2))]·2H(2)O, the Cu(II) atom is in a distorted octa-hedral geometry. The equatorial plane is formed by two N atoms and one O atom from 6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinate and by one N atom from pyridine-2,6-dicarboxyl-ate (pdc). Two pdc O atoms occupy the axial positions. Water mol-ecules are hydrogen bonded to the complex mol-ecules, forming a two-dimensional sheet structure.

| S-EPMC2961460 | biostudies-literature

Poly[[tetra-aqua-bis-(μ(3)-pyridine-2,6-dicarboxyl-ato)(μ(2)-pyridine-2,6-dicarboxyl-ato)dilanthanum(III)] dihydrate].

Project description:There are two independent La(III) cations in the polymeric title compound, {[La(2)(C(7)H(3)NO(4))(3)(H(2)O)(4)]·2H(2)O}(n). One is nine-coordinated in an LaN(2)O(7) tricapped trigonal-prismatic geometry formed by three pyridine-2,6-dicarboxyl-ate anions and two water mol-ecules, while the other is ten-coordinated in an LaNO(9) bicapped square-anti-prismatic geometry formed by four pyridine-2,6-dicarboxyl-ate anions and two water mol-ecules. The two La(III) cations are separated by a non-bonding distance of 5.026 (3) Å. The pyridine-2,6-dicarboxyl-ate anions bridge the La(III) cations, forming a three-dimensional polymeric complex. The crystal structure contains extensive classical O-H⋯O hydrogen bonds and weak inter-molecular C-H⋯O hydrogen bonds. The crystal structure is further consolidated by π-π stacking between pyridine rings, the shortest centroid-centroid distance between parallel pyridine rings being 3.700 (5) Å.

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Project description:The title compound, [Ni(H(2)O)(6)][Ni(3)(C(7)H(3)NO(4))(4)(H(2)O)(4)]·8H(2)O, was obtained by the reaction of nickel(II) nitrate hexa-hydrate with pyridine-2,6-dicarb-oxy-lic acid (pydcH(2)) and 1,10-phenanothroline (phen) in an aqueous solution. The latter ligand is not involved in formation of the title complex. There are three different Ni(II) atoms in the asymmetric unit, two of which are located on inversion centers, and thus the [Ni(H(2)O)(6)](2+) cation and the trinuclear {[Ni(pydc)(2)](2)-?-Ni(H(2)O)(4)}(2-) anion are centrosymmetric. All Ni(II) atoms exhibit an octa-hedral coordination geometry. Various inter-actions, including numerous O-H?O and C-H?O hydrogen bonds and C-O?? stacking of the pyridine and carboxyl-ate groups [3.570?(1), 3.758?(1) and 3.609?(1)?Å], are observed in the crystal structure.

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Project description:In the polymeric title complex, [Zn(C(9)H(7)NO(4))](n), the Zn(II) cation is located on a twofold rotation axis and is coordinated by five 2,6-dimethyl-pyridine-3,5-dicarboxyl-ate (mpdc) anions in a distorted ZnNO(4) trigonal-bipyramidal geometry. The mpdc anion is also located on the twofold rotation axis and bridges five Zn(II) cations, forming the three-dimensional polymeric complex. Weak C-H⋯π inter-actions are present in the crystal structure.

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Diethyl 4-[5-(4-chloro-phen-yl)-1H-pyrazol-4-yl]-2,6-dimethyl-1,4-dihydro-pyridine-3,5-dicarboxyl-ate.

Project description:In the title compound, C(22)H(24)ClN(3)O(4), intra-molecular C-H?O and C-H?N hydrogen bonds form S(9) and S(7) ring motifs, respectively. The 1,4-dihydro-pyridine ring adopts a flattened boat conformation. The benzene ring makes a dihedral angle of 33.36?(6)° with the pyrazole ring. In the crystal, pairs of N-H?N hydrogen bonds link the mol-ecules into inversion dimers. The dimers are stacked in column along the a axis through N-H?O and C-H?N hydrogen bonds. The crystal packing also features C-H?? inter-actions involving the pyrazole ring.

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Project description:In the title compound, [Ni(C(7)H(3)NO(4))(C(12)H(9)N(5))(H(2)O)(2)], the Ni(II) atom is coordinated in a distorted octa-hedral geometry by one N and two O atoms from a pyridine-2,6-dicarboxyl-ate ligand, one N atom from a 3,5-bis-(4-pyrid-yl)-1H-1,2,4-triazole ligand in equatorial positions and two water mol-ecules in axial positions. The crystal packing is consolidated by inter-molecular O-H?O, O-H?N and N-H?O hydrogen bonds.

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Bis[3-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinato]nickel(II) tetra-hydrate.

Project description:In the title complex, [Ni(C(11)H(9)ClN(3)O(2))(2)]·4H(2)O, the Ni atom is coordinated by four N atoms and two O atoms derived from two tridentate 3-chloro-6-(3,5-dimethyl-1H-pyrazol-1-yl)picolinate ligands. The cis-N(4)O(2) donor set defines a distorted octa-hedral geometry. In the crystal structure, the complex and water mol-ecules are linked by O-H⋯O hydrogen bonds.

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Poly[di-?(2)-aqua-?(5)-(pyridine-2,6-dicarboxyl-ato)-?(3)-(pyridine-2,6-dicarboxyl-ato)-cobalt(II)disodium].

Project description:In the title compound, [CoNa(2)(C(7)H(3)NO(4))(2)(H(2)O)(2)](n), the Co(II) atom is coordinated by two pyridine N atoms and four carboxyl-ate O atoms from two doubly deprotonated pyridine-2,6-dicarboxyl-ate ligands in a distorted octa-hedral geometry. One Na(+) cation is coordinated by three carboxyl-ate O atoms and two water mol-ecules and the other is coordinated by five carboxyl-ate O atoms and two water mol-ecules in an irregular geometry. The bis-(pyridine-2,6-dicarboxyl-ato)cobalt complex units are connected by Na(+) cations and bridging water mol-ecules into a three-dimensional coordination network. O-H?O hydrogen bonds are formed between the water mol-ecules and the carboxyl-ate O atoms.

| S-EPMC3238695 | biostudies-literature

2,6-Diamino-pyridinium bis-(4-hydroxy-pyridine-2,6-dicarboxyl-ato-?O,N,O)ferrate(III) dihydrate.

Project description:The reaction of iron(II) sulfate hepta-hydrate with the proton-transfer compound (pydaH)(hypydcH) (pyda = pyridine-2,6-diamine; hypydcH(2) = 4-hydroxy-pyridine-2,6-dicarboxylic acid) in an aqueous solution led to the formation of the title compound, (C(5)H(8)N(3))[Fe(C(7)H(3)NO(5))(2)]·2H(2)O. The anion is a six-coordinated complex with a distorted octa-hedral geometry around the Fe(III) atom. Extensive inter-molecular O-H?O, N-H?O and C-H?O hydrogen bonds, involving the complex anion, (pydaH)(+) counter-ion and two uncoordinated water mol-ecules, and ?-? [centroid-to-centroid distance 3.323?(11)?Å] and C-O?? [O-centroid distance 3.150?(15)?Å] inter-actions connect the various components into a supra-molecular structure.

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2,6-Diamino-pyridinium bis-(4-hydroxy-pyridine-2,6-dicarboxyl-ato-?O,N,O)chromate(III) dihydrate.

Project description:The reaction of chromium(III) nitrate hexa-hydrate, pyridine-2,6-diamine and 4-hydroxy-pyridine-2,6-dicarboxylic acid in a 1:2:2 molar ratio in aqueous solution resulted in the formation of the title compound, (C(5)H(8)N(3))[Cr(C(7)H(3)NO(5))(2)]·2H(2)O or (pydaH)[Cr(hypydc)(2)]·2H(2)O (where pyda is pyridine-2,6-diamine and hypydcH(2) is 4-hydroxy-pyridine-2,6-dicarboxylic acid). Each Cr(III )atom is hexa-coordinated by four O and two N atoms from two (hypydc)(2-) fragments, which act as tridentate ligands, in a distorted octa-hedral geometry. The O-Cr-O-C torsion angles between the two planes of the (hypydc)(2-) fragments [-99.81?(17) and 97.77?(17)°] indicate that these two units are almost perpendicular to one another. In the crystal structure, extensive O-H?O, N-H?O and C-H?O hydrogen bonds with D?A distances ranging from 2.560?(2) to 3.279?(3)?Å, ion pairing, C-O?? [O?? = 3.166?(2)?Å] and ?-? stacking inter-actions between (hypydc)(2-) and (pydaH)(+) rings [with a centroid-centroid distance of 3.3353?(14)?Å] contribute to the formation of a three-dimensional supra-molecular structure.

| S-EPMC2960621 | biostudies-literature

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