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Catena-Poly[[(pyrazine-2-carboxamide-?N (4))copper(I)]-?3-iodido].

ABSTRACT: In the title metal-organic polymeric complex, [CuI(C5H5N3O)] n , the asymmetric unit is composed of one monomer unit of the polymer and one Cu(I) atom linked to one iodide anion and one pyrazine-2-carboxamide mol-ecule. The Cu(I) atom is in a distorted tetra-hedral coordination completed by one pyrazine N atom of the pyrazine-2-carboxamide ligand and three iodide anions. The polymeric structure adopts a well-known ladder-like motif of {CuNI3} tetra-hedra running in the b-axis direction. The mol-ecules of the organic ligand are connected via medium-to-strong N-H?O and N-H?N hydrogen bonds and weak ?-? inter-actions [the distance between two parallel planes of the rings is 3.5476?(14)?Å and the centroid-centroid contact is 4.080?(2)?Å]. The title compound has a relatively high decomposition temperature (564?K) as a result of relatively strong covalent and non-covalent inter-actions inside and between the chains.

SUBMITTER: Krivosudsky L

PROVIDER: S-EPMC4120587 | biostudies-literature | 2014 Jul

REPOSITORIES: biostudies-literature

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catena-Poly[[(pyrazine-2-carboxamide-κN (4))copper(I)]-μ3-iodido].

Krivosudský Lukáš L Rakovský Erik E

Acta crystallographica. Section E, Structure reports online 20140618 Pt 7

In the title metal-organic polymeric complex, [CuI(C5H5N3O)] n , the asymmetric unit is composed of one monomer unit of the polymer and one Cu(I) atom linked to one iodide anion and one pyrazine-2-carboxamide mol-ecule. The Cu(I) atom is in a distorted tetra-hedral coordination completed by one pyrazine N atom of the pyrazine-2-carboxamide ligand and three iodide anions. The polymeric structure adopts a well-known ladder-like motif of {CuNI3} tetra-hedra running in the b-axis direction. The mol- ...[more]

PMID: 25161528

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catena-Poly[[tetra-aqua-copper(II)]-?-pyrazine-2-carboxamide-?(3)N(4):N(1),O-[bis-(sulfato-?O)copper(II)]-?-pyrazine-2-carboxamide-?(3)N(1),O:N(4)].

Project description:In the crystal of the title polymeric compound, [Cu(2)(SO(4))(2)(C(5)H(5)N(3)O)(2)(H(2)O)(4)](n), two independent Cu(II) atoms are located on individual inversion centers. One Cu(II) atom is coordinated by four water mol-ecules and two pyrazine-2-carboxamide ligands in a distorted O(4)N(2) octa-hedral geometry; the other is N,O-chelated by two pyrazine-2-carboxamide ligands and further coordinated by two sulfate anions in a distorted O(4)N(2) octa-hedral geometry. The pyrazine-2-carboxamide ligands bridge the Cu(II) atoms to form a polymeric chain running along [110]. The crystal structure features N-H?O, O-H?O and weak C-H?O hydrogen bonds.

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catena-Poly[[(1,10-phenanthroline-?N,N')copper(I)]-?(2)-iodido].

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Project description:The title polymeric compound, [Cu(2)I(2)(C(8)H(7)N(3))(2)](n) [C(8)H(7)N(3) = 3-(1H-imidazol-2-yl)pyridine (HIPy), where HIPy comes from the in situ deca-rboxylation of 2-(pyridin-3-yl)-1H-imidazole-4,5-dicarb-oxy-lic acid (H(3)PyIDC)], was obtained under solvo-thermal conditions. Each Cu(I) cation is in a distorted tetra-hedral coordination environment defined by two iodide anions and two nitro-gen atoms from two individual HIPy ligands. Two Cu(I) atoms are connected by two HIPy ligands to form a dimer and these dimers are further bridged through the iodide atoms, leading to a chain structure extending parallel to [100]. Moreover, inter-molecular N-H⋯I hydrogen bonds and weak π-π stacking inter-actions [centroid⋯centroid distances of 3.809 (4) Å, an inter-planar separation of 3.345 (3) Å and a ring slippage of 1.822 Å] between pyridyl rings link the chains into a two-dimensional supra-molecular network in the ac plane.

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catena-Poly[[[aqua-(pyrazine-2-carboxamide-?(2)N(1),O)zinc]-?-pyrazine-2-carboxamide-?(3)N(1),O:N(4)] dinitrate].

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Crystal structure of catena-poly[[[(2-eth-oxy-pyrazine-κN)copper(I)]-di-μ2-cyanido] [copper(I)-μ2-cyanido]].

Project description:In the asymmetric unit of the title coordination compound, {[Cu(CN)(C4H3OC2H5N2)][Cu(CN)]} n , there are two Cu atoms with different coordination environments. One CuI ion is coordinated in a triangular coordination geometry by the N atom of the 2-eth-oxy-pyrazine mol-ecule and by two bridging cyanide ligands, equally disordered over two sites exchanging C and N atoms, thus forming polymeric chains parallel to the c axis. The other Cu atom is connected to two bridging cyanide groups disordered over two sites with an occupancy of 0.5 for each C and N atom, and forming an almost linear polymeric chain parallel to the b axis. In the crystal, the two types of chain, which are orthogonal to each other, are connected by cuprophilic Cu⋯Cu inter-actions [2.7958 (13) Å], forming two-dimensional metal-organic coordination layers parallel to the bc plane. The coordination framework is further stabilized by weak long-range (electrostatic type) C-H⋯π inter-actions between cyano groups and 2-eth-oxy-pyrazine rings.

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catena-Poly[[trans-bis-(cyclo-hexane-1,2-diamine-?²N,N)cadmium]-?-iodido-(diiodidocadmium)-?-iodido].

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catena-Poly[[(triphenyl-phosphane)copper(I)]-di-?-iodido-[(triphenyl-phosphane)copper(I)]-?-{1,2-bis-[1-(pyridin-4-yl)ethyl-idene]hydrazine}].

Project description:In the title coordination polymer, [Cu(2)I(2)(C(14)H(14)N(4))(C(18)H(15)P)(2)](n), the Cu(I) atom is coordinated by two I atoms, one P atom and one N atom in a fairly regular tetra-hedral arrangement. A crystallographic inversion centre generates a Cu(2)I(2) diamond with a Cu-Cu separation of 3.0120?(5)?Å. The complete N,N'-(1-pyridin-4-yl-ethethyl-idene)-hydrazine mol-ecule is also generated by inversion symmetry, and this bridging ligand leads to [011] polymeric chains in the crystal structure.

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catena-Poly[[di-aqua-bis-(4-formyl-benzoato-?O (1))copper(II)]-?-pyrazine-?(2) N:N'].

Project description:In the title polymeric compound, [Cu(C8H5O3)2(C4H4N2)(H2O)2] n , the Cu(II) atom is located on a twofold rotation axis and has a slightly distorted octa-hedral coordination sphere. In the equatorial plane, it is coordinated by two carboxyl-ate O atoms of two symmetry-related monodentate formyl-benzoate anions and by two N atoms of the bridging pyrazine ligand, which is bis-ected by the twofold rotation axis. The axial positions are occupied by two O atoms of the coordinating water mol-ecules. In the formyl-benzoate anion, the carboxyl-ate group is twisted away from the attached benzene ring by 6.2?(2)°, while the benzene and pyrazine rings are oriented at a dihedral angle of 68.91?(8)°. The pyrazine ligands bridge the Cu(II) cations, forming polymeric chains running along the b-axis direction. Strong intra-molecular O-H?O hydrogen bonds link the water mol-ecules to the carboxyl-ate O atoms. In the crystal, O-Hwater?Owater hydrogen bonds link adjacent chains into layers parallel to the bc plane. The layers are linked via C-Hpyrazine?Oform-yl hydrogen bonds, forming a three-dimensional network. There are also weak C-H?? inter-actions present.

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catena-Poly[[bis-(?(2)-1,4,7,10,13,16-hexa-oxacyclo-octa-deca-ne)dipotassium]-?(2)-iodido-(iodidocadmium)-di-?(2)-iodido-(iodidocadmium)-?(2)-iodido].

Project description:The reaction of CdCl(2), 18-crown-6 and KI in water yields the title coordination polymer, [{K(C(12)H(24)O(6))}(2)Cd(2)I(6)](n). The potassium ion lies approximately in the plane of the crown ether, coordinated by all six crown ether O atoms and also by an iodide anion bound to a cadmium atom. A C atom of the crown ether is disordered over two positions with site occupancies of 0.77?(2) and 0.23?(2). Two K(18-crown-6)(+) units are linked by inversion symmetry, forming a [bis-(?(2)-18-crown-6)dipottasium] system with approximately square-planar K(2)O(2) units. Inversion symmetry also generates the Cd(2)I(6) fragment and the polymeric system is extended along the c axis by the formation of K-I-Cd bridges.

| S-EPMC3569213 | biostudies-literature

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