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Crystal structure of catena-poly[[di-iodidomer-cury(II)]-μ-2,2'-di-thio-bis-(pyridine N-oxide)-κ2O:O'].

ABSTRACT: The title compound, [HgI2(C10H8N2O2S2)] n , a one-dimensional coordination polymer with HgI2 units and 2,2'-di-thio-bis-(pyridine N-oxide) spacer ligands in an alternating fashion, forms helical chains running along the b axis in the crystal. Within a single coordination polymer strand, the axially chiral 2,2'-di-thio-bis-(pyridine N-oxide) ligands are homochiral, but the enanti-omeric conformation is present in adjacent strands. Within a coordination polymer strand, the iodido ligands point towards the centroids of the aromatic rings of the pyridine N-oxide moieties in the coordination sphere of HgII. Moreover, intra-strand C-H⋯O and C-H⋯I inter-actions, and inter-strand short S⋯I and S⋯O contacts are observed.

SUBMITTER: Seidel RW

PROVIDER: S-EPMC5946961 | biostudies-literature |

REPOSITORIES: biostudies-literature

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catena-Poly[[bis-(pyridine-κN)cadmium]-di-μ(2)-thio-cyanato-κN:S;κS:N].

Project description:The asymmetric unit of the title compound, [Cd(NCS)(2)(C(5)H(5)N)(2)](n), consists of two crystallographically independent Cd(II) cations, four thio-cyanato anions and four pyridine ligands. The Cd(II) atoms are each coordinated by four N atoms from two pyridine ligands and two thio-cyanato anions, each in a mutually cis orientation, and by two S atoms from two adjacent thio-cyanato anions within a slightly distorted octa-hedral coordination environment. The Cd(II) atoms are μ-1,3-bridged via the thio-cyanato anions into polymeric chains parallel to [001]. The Cd(II)⋯Cd(II) intra-chain separations range between 5.9688 (6) and 6.0195 (6) Å, whereas the shortest Cd(II)⋯Cd(II) inter-chain separations are 7.8272 (7) and 8.6312 (6) Å.

| S-EPMC3099960 | biostudies-literature

Crystal structure of poly[[(2,2'-bi-pyridine)manganese(II)]-di-?-thio-cyanato].

Project description:In the crystal structure of the polymeric title compound, [Mn(NCS)2(C10H8N2)] n , the Mn(II) cations are coordinated by one chelating 2,2'-bi-pyridine ligand and four thio-cyanate anions (two N- and two S-coordinating), forming a distorted [MnN4S2] octa-hedron. The asymmetric unit consists of one manganese cation located on a twofold rotation axis and half of a 2,2'-bi-pyridine ligand, the other half being generated by the same twofold rotation axis, as well as one thio-cyanate anion in a general position. The Mn(II) cations are linked by two pairs of ?1,3-bridging thio-cyanate ligands into chains along the c axis; because the N atoms of the 2,2'-bi-pyridine ligands, as well as the N and the S atoms of the thio-cyanate anions, are each cis-coordinating, these chains show a zigzag arrangement.

| S-EPMC4257407 | biostudies-literature

catena-Poly[[bis-(3-benzoyl-pyridine-κN)zinc(II)]-di-μ-dicyanamido-κN:N].

Project description:The title compound, [Zn(C(2)N(3))(2)(C(12)H(9)NO)(2)](n), is a polymeric zinc(II) complex with the metal ion located on an inversion centre. The Zn(II) ion is six-coordinated by two N atoms of two 3-benzoyl-pyridine ligands and four N atoms from four dicyanamide ligands, forming a slightly distorted octa-hedral configuration. In the crystal structure, neighboring Zn atoms are linked together by double dicyanamide bridges to form a polymeric zinc(II) complex.

| S-EPMC2961919 | biostudies-literature

catena-Poly[[bis-(pyridine-?N)nickel(II)]-di-?-thio-cyanato-?(2) N:S;?(2) S:N].

Project description:In the title compound, [Ni(NCS)2(C5H5N)2] n , the Ni(2+) cation is coordinated by four thio-cyanate anions (?-1,3) and two pyridine ligands within a slightly distorted octa-hedral configuration. The Ni-N bond lengths to the pyridine rings are 2.1189?(17) and 2.1241?(17)?Å, whereas those to the thiocyanate anions are 2.0299?(18) and 2.0359?Å. The Ni-S bond lengths are 2.5357?(6) and 2.5568?(6)?Å. The Ni(2+) cations are linked by N:S-bridging thio-cyanate ligands into chains extending along [010]. The Ni?Ni distance within the chains is 5.5820?(5)?Å. The asymmetric unit contains two Ni(2+) cations of which one is located on a centre of inversion, whereas the second is located on a general position.

| S-EPMC4051106 | biostudies-literature

catena-Poly[{di-μ-isonicotinato-bis[di-aqua-isonicotinatoeuropium(III)]}-μ-isonicotinato-[diisonicotinatocopper(II)]-μ-isonicotinato].

Project description:The title compound, [CuEu(2)(C(6)H(4)NO(2))(8)(H(2)O)(4)](n), displays a one-dimensional chain structure. The four-coordinate Cu(II) ion (site symmetry ) adopts a trans-CuN(2)O(2) geometry and is bridged by two carboxyl-ate groups from two isonicotinate ligands. The Eu(III) ion adopts a distorted square-anti-prismatic geometry, being coordinated by four O atoms from bridging carboxyl-ate groups of four isonicotinate ligands, two O atoms from chelating carboxyl-ate groups of one isonicotinate ligand and two O atoms from coordinated water mol-ecules; adjacent Eu(III) ions in the chain are related by inversion. The water mol-ecules interact with the ligands via O-H⋯N hydrogen bonds [O⋯O = 2.782 (3)-2.881 (3) Å], which link the chains into a three-dimensional structure.

| S-EPMC2959990 | biostudies-literature

catena-Poly[(E)-4,4'-(ethane-1,2-di-yl)dipyridinium [[bis-(thio-cyanato-κN)ferrate(II)]-di-μ-thio-cyanato-κN:S;κS:N]].

Project description:In the crystal structure of the title compound, {(C(12)H(14)N(2))[Fe(NCS)(4)]}(n), the iron(II) cation is coordinated by four N-bonded and two S-bonded thio-cyanate anions in a distorted octa-hedral coordination mode. The asymmetric unit consists of half an iron(II) cation and half a protonated (E)-4,4'-(ethane-1,2-di-yl)dipyridinium dication, each located on a centre of inversion. In addition, there are two thio-cyanate anions in general positions. The crystal structure consists of Fe-(NCS)(2)-Fe chains in which each iron(II) cation is additionally coordinated by two terminal N-bonded thio-cyanate anions. Non-coordinating dipyridinium dications are present between the thiocyanatoferrate(II) chains and are connected to the anions via N-H⋯N and N-H⋯S hydrogen-bond interactions.

| S-EPMC3246934 | biostudies-literature

catena-Poly[[[bis-[aqua-nickel(II)]bis-(?-pyridine-2,6-dicarboxyl-ato N-oxide)]-?-1,2-di-4-pyridylethane] tetra-hydrate].

Project description:In the title compound, {[Ni(2)(C(7)H(3)NO(5))(2)(C(12)H(12)N(2))(H(2)O)(2)]·4H(2)O}(n), two Ni(II) ions, two tridentate pyridine-2,6-dicarboxyl-ate N-oxide ligands and two coordinated water mol-ecules form centrosymmetric dinuclear units, which are further bridged by centrosymmetric 1,2-di-4-pyridylethane ligands into polymeric chains along [210]. Each Ni(II) ion has a distorted square-pyramidal environment, with the basal plane formed by three O [Ni-O = 1.9290?(16)-1.9588?(10)?Å] and one N [Ni-N = 1.9828?(18)?Å] atoms and the apical position occupied by the water mol-ecule [Ni-O = 2.2643?(11)?Å]. The water mol-ecules are involved in the formation of O-H?O hydrogen bonds.

| S-EPMC2959744 | biostudies-literature

catena-Poly[[bis-(thio-cyanato-?N)cobalt(II)]-di-?-thio-urea-?(4)S:S].

Project description:In the title polymeric complex, [Co(NCS)(2){SC(NH(2))(2)}(2)](n), the asymmetric unit comprises a Co(II) ion, which is situated on an inversion centre, an N-bound thio-cyanate anion and a ?(2)-bridging thio-urea mol-ecule. The Co(II) atom is coordinated in a distorted octa-hedral fashion within an N(2)S(4) donor set. The bridging thio-urea ligands link Co(II) ions into a polymeric chain extending along [100]. The mol-ecular conformation is stabilized by intra-molecular N-H?N hydrogen bonds, which generate S(6) ring motifs. The crystal packing is stabilized by N-H?S inter-actions, which connect the chains into a three-dimensional architecture.

| S-EPMC3414167 | biostudies-literature

catena-Poly[[[diaqua-terbium(III)]-μ-6-carboxy-nicotinato-μ-pyridine-2,5-di-carboxyl-ato] dihydrate].

Project description:The title compound, {[Tb(C(7)H(3)NO(4))(C(7)H(4)NO(4))(H(2)O)(2)]·2H(2)O}(n), is isotypic with the analogous Tm(III) compound [Li, Zhang, Wang & Bai (2009). Acta Cryst. E65, m411]. The Tb(III) atom is octa-coordinated by two water mol-ecules and by four carboxyl-ate O atoms and two pyridyl N atoms from two pyridine-2,5-dicarboxyl-ate (2,5-pydc) and two 6-carboxy-nicotinate (2,5-Hpydc) ligands. The 2,5-pydc and 2,5-Hpydc ligands bridge Tb(III) atoms, generating helical coordination polymers along [001]. An extensive network of O-H⋯O hydrogen bonds is formed between the coordination polymers and the uncoordinated water mol-ecules. The refined Flack parameter of 0.54 (2) suggests inversion twinning.

| S-EPMC2968984 | biostudies-literature

catena-Poly[[[diaqua-thulium(III)]-μ-6-carboxy-nicotinato-μ-pyridine-2,5-di-carboxyl-ato] dihydrate].

Project description:The title compound, {[Tm(C(7)H(3)NO(4))(C(7)H(4)NO(4))(H(2)O)(2)]·2H(2)O}(n), is isotypic with the analogous Tb(III) compound [Li et al. (2009 ▶). Acta Cryst. E65, m410]. All interatomic distances and angles and the hydrogen-bond geometries are very similar for the two structures. The refined Flack parameter of 0.49 (2) suggests inversion twinning.

| S-EPMC2968913 | biostudies-literature

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