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Bis(2-amino-4-methyl-pyridinium) tetra-chloridocuprate(II).

ABSTRACT: The asymmetric unit of the title compound, (C(6)H(9)N(2))(2)[CuCl(4)], consists of one cation and one half-anion, bis-ected by a twofold rotation axis through the metal center. The anion exhibits a geometry that is inter-mediate between a T(d) and D(4h) arrangement about the Cu atom. The crystal structure contains chains of cations alternating with stacks of anions. The cationic groups inter-act via offset face-to-face π-π stacking, forming chains running along the c axis. The anion stacks are parallel to the cation chains, with no significant inter- nor intra-stack Cl⋯Cl inter-actions. There are several anion-cation hydrogen-bonding inter-actions of the (N-H)(pyridine)⋯Cl and (N-H)(amino)⋯Cl types, connecting the chains of cations to the stacks of anions. Both the N-H⋯Cl and π-π stacking inter-actions [centroid-centroid distances 3.61 (8) and 3.92 (2) Å] contribute to the formation of a three-dimensional supra-molecular architecture.

SUBMITTER: Al-Far RH

PROVIDER: S-EPMC2967911 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Bis(2-amino-6-methyl-pyridinium) tetra-chloridocuprate(II).

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Bis-(2-amino-6-methyl-pyridinium) tetra-bromido-cuprate(II).

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Project description:In the title mol-ecular salt, (C(6)H(16)N)(2)[CuCl(4)], the Cu(II) ion adopts an extremely distorted tetra-hedral coordination geometry. All the ammonium H atoms are involved in N-H?Cl hydrogen bonds, which serve to link the cations and anions into chains propagating along the c-axis direction.

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Bis[4-(dimethyl-amino)pyridinium] tetra-bromidocobaltate(II).

Project description:The metal atom in the title salt, (C(7)H(11)N(2))(2)[CoBr(4)], shows a slightly distorted tetra-hedral coordination. The cation forms an N-H?Br hydrogen bond to one of the two Br atoms. The Co(II) atom lies on a special position of 2 site symmetry.

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Bis[4-(dimethyl-amino)pyridinium] tetra-bromidocuprate(II).

Project description:The metal atom in the anion of the title salt, (C(7)H(11)N(2))(2)[CuBr(4)], shows a distorted tetra-hedral coordination. The primary contacts between the ions are of the N-H?Br type.

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Bis(4-amino-pyridinium) tetra-chlorido-cobaltate(II).

Project description:In the title compound, (C(5)H(7)N(2))(2)[CoCl(4)], the cobalt(II) ion is coordinated by four chloride ions in a slightly distorted tetra-hedral geometry. The crystal packing is stabilized by inter-molecular N-H?Cl hydrogen bonding, forming a three-dimensional network. The crystal was a non-merohedral twin emulating tetra-gonal symmetry, but being in fact ortho-rhom-bic.

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Bis(2-amino-4-methyl-pyridinium) terephthalate tetra-hydrate.

Project description:In the crystal structure of the title salt, 2C(6)H(9)N(2) (+)·C(8)H(4)O(4) (2-)·4H(2)O, the terephthalate carboxyl-ate groups inter-acts with the 2-amino-4-methyl-pyridinium cations via a pair of N-H?O hydrogen bonds, forming an R(2) (2)(8) ring motif. The water mol-ecules form an R(6) (6)(12) ring motif through O-H?O hydrogen bonds and these motifs are fused, forming a supra-molecular chain along the c axis. The R(2) (2)(8) and R(6) (6)(12) ring motifs are connected via O-H?O hydrogen bonds. In addition, ?-? stacking inter-actions are observed between the pyridinium rings [centroid-centroid distance = 3.522?(12)?Å].

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(2R)-2-Methyl-piperazinediium tetra-chloridocuprate(II).

Project description:In the title compound, (C(5)H(14)N(2))[CuCl(4)], the copper(II) ion has a slightly tetra-hedrally distorted square-planar coordin-ation geometry and the diprotonated piperazine ring adopts a chair conformation. In the crystal structure, cations and anions are linked by inter-molecular N-H?Cl hydrogen bonds, forming a three-dimensional network.

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Bis(3-methyl-pyridinium) tetra-(chlorido/bromido)cuprate(II).

Project description:The structure of the title salt, (C(6)H(8)N)(2)[CuCl(3.4)Br(0.6)], consists of two 3-methyl-pyridinium cations and a distorted tetra-hedral [CuCl(3.4)Br(0.6)](2-) dianion. Substitutional disorder with Br is exhibited for three of the Cl atoms of the anion, giving a mixed chloride/bromide cuprate(II) anion. In the crystal, inter-molecular N-H?Cl hydrogen bonds link two cations to one anion, forming a three-ion aggregate. These are connected into a supra-molecular chain along the b axis via ?-? inter-actions between the pyridinium rings [centroid-centroid distance = 3.743?(3)?Å].

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