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Bis[4-(dimethyl-amino)-pyridinium] octa-aqua-chloridolanthanum(III) tetra-chloride trihydrate.

ABSTRACT: The title organic-inorganic salt, (C(7)H(11)N(2))(2)[LaCl(H(2)O)(8)]Cl(4)·3H(2)O, consists of two 4-(dimethyl-amino)-pyridinium and one [La(H(2)O)(8)Cl](2+) cations, four chloride anions and three solvent water mol-ecules. In the crystal, the various units are connected by N-H⋯Cl, O-H⋯Cl, O-H⋯O and N-H⋯O hydrogen bonds, forming a network of alternating organic and inorganic layers. The 4-(dimethyl-amino)-pyridinium cations stack along the c axis, while the inorganic layers lie parallel to the ac plane. The chloride anions are located between these entities, forming hydrogen bonds with the NH atom of the pyridinium ions and the water mol-ecules. There are also C-H⋯Cl hydrogen bonds present involving one of the 4-(dimethyl-amino)-pyridinium cations, resulting in the formation of a three-dimensional supra-molecular architecture.

SUBMITTER: Benslimane M

PROVIDER: S-EPMC3515091 | biostudies-literature |

REPOSITORIES: biostudies-literature

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4-(Dimethyl-amino)-pyridinium octa-aqua-erbium(III) tetra-chloride monohydrate.

Project description:In the title compound, (C(7)H(11)N(2))[Er(H(2)O)(8)]Cl(4)·H(2)O, the asymmetric unit consists of one 4-(dimethyl-amino)-pyridinium and one octa-aqua-erbium cation balanced by four Cl(-) anions, and one water mol-ecule. The 4-(dimethyl-amino)-pyridinium cation is protonated at the pyridine N atom. The dimethyl-amino group (C/N/C) lies close to the plane of the pyridinium ring, making a dihedral angle of 4.5 (3)°. In the crystal, the [Er(H(2)O)(8)](3+) cations are linked via O-H⋯O and O-H⋯Cl hydrogen bonds, forming two-dimensional networks propagating in the ab plane. These networks are linked via O-H⋯O and O-H⋯Cl hydrogen bonds, forming a three-dimensional network. The 4-(dimethyl-amino)-pyridinium cations are located in the cavities and are linked to the framework via N-H⋯Cl, C-H⋯O and C-H⋯Cl hydrogen bonds.

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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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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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Project description:The Cd atom in the hydrated title salt, (C(7)H(11)N(2))(2)[CdBr(4)]·H(2)O, exists in an approximately tetra-hedral coordination geometry, with Br-Cd-Br angles in the range 105.52 (3)-111.50 (3)°. The cation, anion and water mol-ecule inter-act by O-H⋯Br, N-H⋯Br and N-H⋯O hydrogen bonds, forming a linear chain structure running along the a axis.

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Project description:The Sn(IV) atom of the stannate anion in the title salt, (C(7)H(11)N(2))(2)[SnBr(4)(C(6)H(5))(2)], lies on a center of inversion in a tetra-gonally compressed octa-hedron. The two independent Br atoms in the anion are hydrogen-bond acceptors for the same cation.

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