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Butane-1,4-diammonium bis-(pyridine-2,6-dicarboxyl-ato-?O,N,O)cadmate(II) dihydrate.

ABSTRACT: In the title compound, (C(4)H(14)N(2))[Cd(C(7)H(3)NO(4))(2)]·2H(2)O, the Cd(II) ion is coordinated by four O atoms [Cd-O = 2.2399?(17)-2.2493?(17)?Å] and two N atoms [Cd-N = 2.3113?(15) and 2.3917?(15)?Å] from two tridentate pyridine-2,6-dicarboxyl-ato ligands in a distorted octa-hedral geometry. The uncoordinated water mol-ecules are involved in O-H?O and N-H?O hydrogen bonds, which contribute to the formation of a three-dimensional supra-molecular structure, along with ?-? stacking inter-actions [centroid-centroid distances of 3.5313?(13) and 3.6028?(11)?Å between the pyridine rings of neighbouring dianions].

SUBMITTER: Tabatabaee M

PROVIDER: S-EPMC2959406 | biostudies-literature | 2008 Sep

REPOSITORIES: biostudies-literature

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Butane-1,4-diammonium bis-(pyridine-2,6-dicarboxyl-ato-κO,N,O)cadmate(II) dihydrate.

Tabatabaee Masoumeh M Aghabozorg Hossein H Nasrolahzadeh Roghaieh R Roshan Leila L Firoozi Najmeh N

Acta crystallographica. Section E, Structure reports online 20080920 Pt 10

In the title compound, (C(4)H(14)N(2))[Cd(C(7)H(3)NO(4))(2)]·2H(2)O, the Cd(II) ion is coordinated by four O atoms [Cd-O = 2.2399 (17)-2.2493 (17) Å] and two N atoms [Cd-N = 2.3113 (15) and 2.3917 (15) Å] from two tridentate pyridine-2,6-dicarboxyl-ato ligands in a distorted octa-hedral geometry. The uncoordinated water mol-ecules are involved in O-H⋯O and N-H⋯O hydrogen bonds, which contribute to the formation of a three-dimensional supra-molecular structure, along with π-π stacking inter-actio ...[more]

PMID: 21201034

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Butane-1,4-diammonium bis-(pyridine-2,6-dicarboxyl-ato)cuprate(II) trihydrate.

Project description:In the title compound, (C(4)H(14)N(2))[Cu(C(7)H(3)NO(4))(2)]·3H(2)O or (bdaH(2))[Cu(pydc)(2)]·3H(2)O (where bda is butane-1,4-diamine and pydcH(2) is pyridine-2,6-dicarboxylic acid), the Cu(II) atom is coordinated by four O atoms [Cu-O = 2.0557 (16)-2.3194 (16) Å] and two N atoms [Cu-N = 1.9185 (18) and 1.9638 (18) Å] from two chelating rings of the pydc(2-) anions, which act as tridentate ligands. The geometry of the resulting CuN(2)O(4) coordination can be described as distorted octa-hedral. The the two pydc(2-) fragments are almost perpendicular to one another [77.51 (11)°]. To balance the charges, two centrosymmetric protonated butane-1,4-diammonium, (bdaH(2))(2+) cations are present. In the crystal structure, extensive O-H⋯O, N-H⋯O and C-H⋯O hydrogen bonds [D⋯A = 2.720 (2)-3.446 (3) Å], ion pairing, C-O⋯π [O⋯π = 3.099 (2) Å] and π-π stacking inter-actions between the pydc(2-) rings [centroid-centroid distance = 3.5334 (15) Å] contribute to the formation of a three-dimensional supra-molecular structure.

| S-EPMC2961264 | 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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Propane-1,2-diaminium bis-(pyridine-2,6-dicarboxyl-ato-?O,N,O)cadmate dihydrate.

Project description:The reaction of cadmium nitrate dihydrate, propane-1,2-diamine and pyridine-2,6-dicarb-oxy-lic acid in a 1:1:2 molar ratio in an aqueous solution resulted in the formation of the title compound, (C(3)H(12)N(2))[Cd(C(7)H(3)NO(4))(2)]·2H(2)O or (p-1,2-daH(2))-[Cd(pydc)(2)]·2H(2)O (where p-1,2-da is propane-1,2-diamine and pydcH(2) is pyridine-2,6-dicarb-oxy-lic acid). The Cd(II) ion is coordinated by four O and two N atoms of two pydc ligands in a distorted octa-hedral environment. The structure also contains two uncoordinated water mol-ecules. In the crystal, there are several inter-molecular N-H?O, O-H?O and weak C-H?O hydrogen bonds. There are also ?-? stacking inter-actions between the pyridine rings of pydc units, with centroid-centroid distances of 3.4708?(16)?Å.

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Benzene-1,3-diammonium bis-(pyridine-2,6-dicarboxyl-ato)nickelate(II) penta-hydrate.

Project description:In the title compound, (C(6)H(10)N(2))[Ni(C(7)H(3)NO(4))(2)]·5H(2)O, the Ni(II) ion is six-coordinated by two N and four O atoms from two pyridine-2,6-dicarboxyl-ate ligands in a distorted octa-hedral fashion. The crystal packing is stabilized by inter-molecular O-H⋯O and N-H⋯O and weak C-H⋯O hydrogen bonds and π-π inter-actions [centroid-centroid distances = 3.4669 (19) and 3.764 (2) Å].

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Poly[[[?(2)-1,1'-(butane-1,4-di-yl)bis-(1H-imidazole)-?N:N](?(2)-2,6-di-methyl-pyridine-3,5-dicarboxyl-ato-?O:O)zinc] dihydrate].

Project description:In the title coordination polymer, {[Zn(C(9)H(7)NO(4))(C(10)H(14)N(4))]·2H(2)O}(n), the Zn(II) ion displays a distorted tetra-hedral geometry with two imidazole N atoms from two 1,1'-(butane-1,4-di-yl)bis-(imidazole) (bbi) ligands and two carboxyl-ate O atoms from two 2,6-dimethyl-pyridine-3,5-dicarboxyl-ate (dpdc) ligands. The bbi and dpdc ligands bridge the Zn(II) ions, forming layers parallel to (011). O-H?O and O-H?N hydrogen bonds and ?-? inter-actions between the imidazole rings [centroid-centroid distance = 3.807?(5)?Å] connect the layers. Two of the three uncoordinated water mol-ecules are disordered, each over two 0.25-occupancy positions.

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Propane-1,2-diammonium bis-(pyridine-2,6-dicarboxyl-ato-κO,N,O')nickelate(II) tetra-hydrate.

Project description:The reaction of nickel(II) nitrate hexa-hydrate, propane-1,2-diamine and pyridine-2,6-dicarboxylic acid in a 1:2:2 molar ratio in aqueous solution resulted in the formation of the title compound, (C(3)H(12)N(2))[Ni(C(7)H(3)NO(4))(2)]·4H(2)O or (p-1,2-daH(2))[Ni(pydc)(2)]·4H(2)O (where p-1,2-da is propane-1,2-diamine and pydcH(2) is pyridine-2,6-dicarboxylic acid). The geometry of the resulting NiN(2)O(4) coordination can be described as distorted octa-hedral. Considerable C=O⋯π stacking inter-actions are observed between the carboxyl-ate C=O groups and the pyridine rings of the (pydc)(2-) fragments, with O⋯π distances of 3.1563 (12) and 3.2523 (12) Å and C=O⋯π angles of 95.14 (8) and 94.64 (8)°. In the crystal structure, a wide range of non-covalent inter-actions, consisting of hydrogen bonding [O-H⋯O, N-H⋯O and C-H⋯O, with D⋯A distances ranging from 2.712 (2) to 3.484 (2) Å], ion pairing, π-π [centroid-to-centroid distance = 3.4825 (8) Å] and C=O⋯π stacking, connect the various components to form a supra-molecular structure.

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Butane-1,4-diammonium bis-(pyridine-2-carboxyl-ate) monohydrate.

Project description:The asymmetric unit of the title compound, C(4)H(14)N(2) (2+)·2C(6)H(4)NO(2) (-)·H(2)O, consists of half of a doubly protonated tetra-methyl-enediammonium dication, a pyridine-2-carboxyl-ate anion and half of a solvent water mol-ecule; the dication is located on a centre of inversion and a twofold rotation axis passes through the O atom of the water mol-ecule. The carboxyl-ate group of the anion appears to be delocalized on the basis of the C-O bond lengths. In the crystal structure, the components are linked by inter-molecular N-H?O, N-H?N and O-H?O hydrogen bonds.

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Hexaaqua-nickel(II) tetra-aqua-bis-(?-pyridine-2,6-dicarboxyl-ato)bis-(pyridine-2,6-dicarboxyl-ato)trinickelate(II) octa-hydrate.

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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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.

| S-EPMC2959321 | biostudies-literature

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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