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

ABSTRACT: 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.

SUBMITTER: Mir Mohammad Sadegh B

PROVIDER: S-EPMC2979956 | biostudies-literature | 2010 Jan

REPOSITORIES: biostudies-literature

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

Mir Mohammad Sadegh Bahareh B Azhdari Tehrani Alireza A Khavasi Hamid Reza HR

Acta crystallographica. Section E, Structure reports online 20100116 Pt 2

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 th ...[more]

PMID: 21579633

Similar Datasets

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[[(2,2'-dimethyl-4,4'-bi-1,3-thia-zole-κN,N')cadmium]-di-μ-bromido].

Project description:In the title coordination polymer, [CdBr(2)(C(8)H(8)N(2)S(2))](n), the Cd(II) atom is six-coordinated in a distorted octa-hedral geometry by two N atoms from a 2,2'-dimethyl-4,4'-bi-1,3-thia-zole ligand and four bridging Br atoms. The bridging function of the Br atoms leads to a chain structure along [100]. Inter-chain C-H⋯Br hydrogen bonds and π-π contacts between the thia-zole rings [centroid-centroid distances = 3.810 (5) and 3.679 (5) Å] are observed.

| S-EPMC3152112 | biostudies-literature

Di-μ-bromido-bis-[bromido(4,4'-dimethyl-2,2'-bipyridine-κN,N')mercury(II)].

Project description:The asymmetric unit of the title compound, [Hg(2)Br(4)(C(12)H(12)N(2))(2)], contains one half-mol-ecule. The Hg(II) atom is five-coordinated in a trigonal-bipyramidal configuration by two N atoms from the chelating 4,4'-dimethyl-2,2'-bipyridine ligand, two bridging Br and one terminal Br atom, leading to a centrosymmetric dimeric mol-ecule. There is a π-π contact between the pyridine rings [centroid-to-centroid distance = 3.756 (5) Å].

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Project description:In the title compound, [HgCl(2)(C(6)H(5)NO(2))(2)](n), the Hg(II) cation is located on an inversion center and is six-coordinated in a distorted octa-hedral geometry by two N atoms from two pyridine-3-carb-oxy-lic acid mol-ecules and four bridging Cl(-) anions. The bridging function of the Cl(-) anions leads to polymeric chains running along the a axis. One Hg-Cl bond is much longer than the other. In the crystal, O-H⋯O and weak C-H⋯Cl hydrogen bonds are observed.

| S-EPMC3343898 | biostudies-literature

catena-Poly[[(N,N-di-methyl-cyanamide-κN)lithium]-μ3-bromido].

Project description:The title complex, [LiBr(C3H6N2)] n , is the unexpected product of a reaction beteween (Dipp)N(Li)SiMe3 (Dipp = 2,6-diiso-propyl-phen-yl), Me2NCN and CuBr. The compound is a one-dimensional polymer with a step structure derived from the association of inversion dimers, formed by bromido ligands bridging two Li(+) cations, each of which carries a di-methyl-cyanamide ligand. The planar (LiBr)2 unit of the polymer core has a regular rhombic shape [Li-Br-Li 77.55 (16)° and Br-Li-Br 102.45 (16)°]. These (LiBr·NCNMe2)2 dimers represent the repeat unit of a polymer system propagated by additional Br-Li and Li-Br bonds generating an infinite step structure along the a-axis direction.

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catena-Poly[[chloridomercury(II)]-μ-1,4-diaza-bicyclo-[2.2.2]octane-κN:N'-[chlorido-mercury(II)]-di-μ-chlorido].

Project description:In the title coordination polymer, [Hg(2)Cl(4)(C(6)H(12)N(2))](n), each Hg(II) center within the chain is four-coordinated by one terminal Cl atom, two bridging μ(2)-Cl atoms, and one N-atom donor from a μ(2)-1,4-diaza-bicyclo-[2.2.2]octane (μ(2)-daco) ligand in a distorted tetra-hedral geometry. The daco ligand acts as an end-to-end bridging ligand and bridges adjacent Hg(II) centers, forming a chain running along [001]. Weak C-H⋯Cl hydrogen-bonding inter-actions link the chains into a three-dimensional network. Comparison of the structural differences with previous findings suggests that the space between the two N donors, as well as the skeletal rigidity in N-heterocyclic linear ligands, may play an important role in the construction of such supra-molecular networks.

| S-EPMC2971285 | biostudies-literature

catena-Poly[[(2,2′-bipyridine-κ2N,N′)manganese(II)]-di-μ-bromido]

Project description:The central MnII ion has a cis-N2Br4 octahedral coordination sphere defined by two N atoms of the bidentate 2,2′-bipyridine ligand and four bridging Br− anions. In the polymeric title complex, [MnBr2(C10H8N2)]n, the MnII ion, situated on a twofold axis of symmetry, is six-coordinated in a distorted octahedral coordination geometry defined by two N atoms from the chelating 2,2′-bipyridine ligand and four bridging Br− anions. The crystal reveals a one-dimensional Br-bridged chain along the c-axis direction with a zigzag topology. In the crystals, contacts between chains include π–π interactions between pyridyl rings [inter-centroid separation = 4.082 (1) Å]

| S-EPMC9462262 | biostudies-literature

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

Project description: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.

| S-EPMC3297255 | biostudies-literature

catena-Poly[diacridinium [zinc(II)-di-μ-pyrazine-2,3-dicarboxyl-ato-κN,O:O;O:N,O]].

Project description:The crystal structure of the title compound, {(C(13)H(10)N)(2)[Zn(C(6)H(2)N(2)O(4))(2)]}(n), consists of polymeric Zn complex anions and discrete acridinium cations. The Zn cation, located on an inversion center, is N,O-chelated by two pyrazine-2,3-dicarboxyl-ate (pyzdc) anions in the basal plane, and is further coordinated by two carboxyl-ate O atoms from adjacent pyzdc anions in the axial directions with a longer Zn-O bond distance, forming a distorted ZnN(2)O(4) coordination geometry. The pyzdc anions bridge the Zn cations, forming polymeric chains running along the crystallographic b axis. The acridinium cations are linked to the complex chains via N-H⋯O and C-H⋯O hydrogen bonding. Significant π-π stacking between parallel acridinium ring systems is observed in the crystal structure, face-to-face distances being 3.311 (3) and 3.267 (4) Å.

| S-EPMC3007445 | biostudies-literature

catena-Poly[[bis-(μ-3-amino-pyrazine-2-carboxyl-ato)-κN,O:O;κO:N,O)dilithium]-di-μ-aqua].

Project description:The title compound, [Li(C(5)H(4)N(3)O(2))(H(2)O)](n), is composed of centrosymmetric dinuclear units, in which the Li(I) ions are bridged by two carboxyl-ate O atoms donated by two ligands. The dinuclear unit is nearly planar [r.m.s. deviation = 0.0125 (2) Å]. The Li(I) ion is coordinated by an N,O-chelating ligand, a bridging carboxyl-ate O atom from another ligand and two bridging water O atoms in a distorted trigonal-bipyra-midal geometry. The water O atoms bridge the dinuclear units into a polymeric mol-ecular column along [010]. The columns are held together by O-H⋯O and N-H⋯N hydrogen bonds. An intra-molecular N-H⋯O inter-action also occurs.

| S-EPMC3006785 | biostudies-literature

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