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Catena-Poly[[diiodidomercury(II)]-?(2)-2-amino-pyrazine-?N:N].

ABSTRACT: In the crystal of the title polymeric compound, [HgI(2)(C(4)H(5)N(3))](n), the Hg(II) cation is located on a twofold rotation axis and is coordinated by two I(-) anions and two 2-amino-pyrazine ligands in a distorted HgI(2)N(2) tetra-hedral geometry. In the crystal, the 2-amino-pyrazine ligand is equally disordered over two positions about an inversion center, and bridges the Hg(II) cations with pyrazine N atoms to form a polymeric chain running along the c axis. In the polymeric chain, the amino groups link to the coordinated I(-) anions via inter-molecular N-H?I hydrogen bonds.

SUBMITTER: Shirvan SA

PROVIDER: S-EPMC3297255 | biostudies-literature | 2012 Mar

REPOSITORIES: biostudies-literature

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catena-Poly[[diiodidomercury(II)]-μ(2)-2-amino-pyrazine-κN:N].

Shirvan Sadif A SA Asghariganjeh Mohammad R MR Aghajeri Manouchehr M Haydari Dezfuli Sara S Hossini Farzaneh F

Acta crystallographica. Section E, Structure reports online 20120217 Pt 3

In the crystal of the title polymeric compound, [HgI(2)(C(4)H(5)N(3))](n), the Hg(II) cation is located on a twofold rotation axis and is coordinated by two I(-) anions and two 2-amino-pyrazine ligands in a distorted HgI(2)N(2) tetra-hedral geometry. In the crystal, the 2-amino-pyrazine ligand is equally disordered over two positions about an inversion center, and bridges the Hg(II) cations with pyrazine N atoms to form a polymeric chain running along the c axis. In the polymeric chain, the amin ...[more]

PMID: 22412445

Similar Datasets

catena-Poly[[diiodidomercury(II)]-μ-nicotine-κN:N'].

Project description:The title polymeric complex, [HgI(2)(C(10)H(14)N(2))](n), was prepared from a solution of nicotine, mercury(II) iodide and 4-cyano-pyridine in dimethyl-formamide. Each nicotine mol-ecule is bonded to two Hg atoms, one through the pyrrolidine N atom and the other through the pyridine N atom, forming infinite zigzag polymeric chains. The coordin-ation around mercury is completed by two iodide ligands, resulting in a distorted tetra-hedral arrangement.

| S-EPMC2961948 | biostudies-literature

catena-Poly[[[diiodidomercury(II)]-μ-N,N'-di-3-pyridylpyridine-2,6-dicarboxamide] dimethyl-formamide solvate].

Project description:In the title complex, {[HgI(2)(C(17)H(13)N(5)O(2))]·C(3)H(7)NO}(n), the Hg atom is coordinated by two I atoms and two N atoms from two different ligands in a distorted tetra-hedral environment. Hg atoms are bridged by N,N'-di-3-pyridylpyridine-2,6-dicarboxamide ligands, forming a helical chain running along the a axis.

| S-EPMC2960109 | biostudies-literature

catena-Poly[[[diaqua-iron(II)]-μ-pyrazine-2,3-dicarboxyl-ato] dihydrate].

Project description:The crystal structure of the title compound, {[Fe(C(6)H(2)N(2)O(4))(H(2)O)(2)]·2H(2)O}(n), was synthesized by a diffusion method. It has a one-dimensional polymeric chain structure and the chains are further connected into a three-dimensional structure by hydrogen bonds. The Fe(II) ion has a distorted octa-hedral coordination environment, with two N and two O atoms from the pyrazine-2,3-dicarboxyl-ate ligands in the equatorial plane and with two water mol-ecules in axial positions. The Fe atom lies on a crystallographic centre of symmetry and a twofold rotation axis passes through the pyrazine ring.

| S-EPMC2915058 | biostudies-literature

catena-Poly[[[triaqua-copper(II)]-μ(2)-pyrazine-2,3-dicarboxyl-ato] monohydrate].

Project description:The Cu atom in the title complex, {[Cu(C(6)H(2)N(2)O(4))(H(2)O)(3)]·H(2)O}(n) or {[Cu(L)(H(2)O)(3)]·H(2)O}(n) (L is pyrazine-2,3-dicarbox-yl-ate), displays octa-hedral coordination formed by the ligand L and three coordinated water mol-ecules. The ligand L is tridentate, with one N atom of the pyrazine ring and one O atom of one carboxyl-ate group forming a chelate ring, whereas one O atom from the second carboxyl-ate group is coordinated to another Cu atom. The ligand L links mol-ecules to form an infinite chain parallel to the [101] direction. The chains are further linked through O-H⋯O and O-H⋯N hydrogen bonds involving the water mol-ecules to build up a three-dimensional network.

| S-EPMC2914943 | biostudies-literature

catena-Poly[[bis-(pyrazine-2-carbox-amide)mercury(II)]-di-μ-chlorido].

Project description:In the polymeric title compound, [HgCl(2)(C(5)H(5)N(3)O)(2)](n), the Hg(II) atom (site symmetry ) adopts a distorted trans-HgN(2)Cl(4) octa-hedral coordination geometry. In the crystal, adjacent mercury ions are bridged by pairs of chloride ions, generating infinite [100] chains, and N-H⋯O and N-H⋯(N,N) hydrogen bonds help to consolidate the packing.

| S-EPMC2983533 | biostudies-literature

catena-Poly[[[diaqua-nickel(II)]-?-pyrazine-2-carboxyl-ato-silver(I)-?-pyrazine-2-carboxyl-ato] nitrate dihydrate].

Project description:In the polymeric complex of the title compound, {[AgNi(C(5)H(3)N(2)O(2))(2)(H(2)O)(2)]NO(3)·2H(2)O}(n), the Ag(I) ion displays an angular coordination geometry with two N atoms from pyrazine-2-carboxyl-ate ligands, and the Ni(II) ion is hexa-coordinated by two O atoms from two water mol-ecules, two O and two N atoms from pyrazine-2-carboxyl-ate ligands in a distorted octa-hedral geometry. In the crystal, the Ag(I) and Ni(II) ions lie on a mirror plane and an inversion centre, respectively. The complex chains, the nitrate ions and the uncoordinated water mol-ecules are linked together through O-H?O hydrogen bonds and weak Ag?O inter-actions [2.619?(17)-2.749?(17)?Å] into a three-dimensional network.

| S-EPMC3344408 | biostudies-literature

catena-Poly[[bis-(pyrazine-2-carbox-amide-κN)mercury(II)]-di-μ-bromido].

Project description:In the crystal structure of the title compound, [HgBr(2)(C(5)H(5)N(3)O)(2)](n), the Hg(II) cation is located on an inversion center and is coordinated by two N atoms from the pyrazine rings and four bridging Br(-) anions in a distorted octa-hedral geometry. The Br(-) anions bridge the Hg(II) cations with significantly different Hg-Br bond distances of 2.4775 (8) and 3.1122 (8) Å, forming polymeric chains running along the a axis. Inter-molecular N-H⋯O and N-H⋯N hydrogen bonds are effective in the stabilization of the crystal structure.

| S-EPMC2979956 | biostudies-literature

catena-Poly[[[bis-(3-amino-pyrazine-2-carboxyl-ato)triaqua-praseodymium(III)]-μ-3-amino-pyrazine-2-carboxyl-ato-[(3-amino-pyrazine-2-carboxyl-ato)diaqua-formatopraseodymium(III)]-μ-3-amino-pyrazine-2-carboxyl-ato] hexa-hydrate].

Project description:The asymmetric unit of the polymeric title compound, {[Pr(2)(C(5)H(4)N(3)O(2))(5)(CHO(2))(H(2)O)(5)]·6H(2)O}(n), has two independent Pr(III) atoms; one is coordinated by two water mol-ecules and the other by three water mol-ecules. The first is N,O-chelated by three 3-amino-pyrazine-2-carboxyl-ate ions, whereas the second is chelated by two carboxyl-ate ions; both exist in a monocapped square-anti-prismatic geometry. The polymeric chains that run along the a axis inter-act with the lattice water mol-ecules, generating a three-dimensional hydrogen-bonded network. The formate ion is disordered over two positions with respect to the non-coordinated atoms in a 1:1 ratio.

| S-EPMC3200950 | biostudies-literature

catena-Poly[[dipyridine-cadmium(II)]-?-5-amino-2,4,6-triiodo-isophthalato].

Project description:The hydro-thermal reaction of cadmium(II) nitrate with 5-amino-2,4,6-triiodo-isophthalic acid and pyridine in DMF solution leads to the formation of the title compound, [Cd(C(8)H(2)I(3)NO(4))(C(5)H(5)N)(2)](n). The structure contains a four-coordinate Cd(2+ )ion in a distorted tetra-hedral geometry, which lies on a crystallographic twofold rotation axis. The Cd(2+ )ion is bonded to two N atoms from two pyridine ligands and two carboxyl-ate O atoms from two 5-amino-2,4,6-triiodo-isophthalate anions. The Cd-O distances are 2.429?(5) and 2.305?(5)?Å and the Cd-N distance is 2.236?(8)?Å. The two carboxyl-ate groups of individual 5-amino-2,4,6-triiodo-isophthalate anions act as a bridge to the Cd(2+) atoms. leading to a chain structure along the c axis.

| S-EPMC3009045 | biostudies-literature

A new polymorph of catena-poly[[tri-aqua-cadmium(II)]-?(2)-pyrazine-2,3-dicarboxyl-ato].

Project description:The title complex, [Cd(C(6)H(2)N(2)O(4))(H(2)O)(3)](n), is a new monoclinic polymorph. The ortho-rhom-bic form has previously been reported [Ma et al. (2006 ?). Acta Cryst. E62, m2528-m2529]. The Cd-N and Cd-O bond lengths range from 2.265?(3) to 2.333?(3)?Å; a weak Cd-O inter-action is also present, the inter-atomic distance being 2.658?(4)?Å. The Cd(II) ions, which have a distorted penta-gonal-bipyramidal geometry, are bridged by pyrazine-2,3-dicarboxyl-ato ligands, forming a zigzag chain structure. The chains are connected by O-H?O hydrogen bonds into a three-dimensional framework.

| S-EPMC2977175 | biostudies-literature

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