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A second triclinic polymorph of bis-(?-N-nitroso-N-phenyl-hydroxy-laminato)-?(3)O,O':O';?(3)O':O,O'-bis-[(N-nitroso-N-phenyl-hydroxy-laminato-?(2)O,O')lead(II)].

ABSTRACT: The cupferronate ions in the centrosymmetric dinuclear title compound, [Pb(2)(C(6)H(5)N(2)O(2))(4)], O,O'-chelate to the two Pb(II) atoms; two of the four nitroso O atoms are also involved in bridging. The geometries of the five-coordinate Pb(II) atoms in the two independent mol-ecules are ?-octa-hedral; if more remote Pb?O inter-actions are also considered, the coordination number is increased to six for one mol-ecule and to seven for the other. Their coordination polyhedra are ill defined in the chain motif, which runs along [100].

SUBMITTER: Najafi E

PROVIDER: S-EPMC3379120 | biostudies-literature | 2012 Jun

REPOSITORIES: biostudies-literature

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A second triclinic polymorph of bis-(μ-N-nitroso-N-phenyl-hydroxy-laminato)-κ(3)O,O':O';κ(3)O':O,O'-bis-[(N-nitroso-N-phenyl-hydroxy-laminato-κ(2)O,O')lead(II)].

Najafi Ezzatollah E Amini Mostafa M MM Ng Seik Weng SW

Acta crystallographica. Section E, Structure reports online 20120526 Pt 6

The cupferronate ions in the centrosymmetric dinuclear title compound, [Pb(2)(C(6)H(5)N(2)O(2))(4)], O,O'-chelate to the two Pb(II) atoms; two of the four nitroso O atoms are also involved in bridging. The geometries of the five-coordinate Pb(II) atoms in the two independent mol-ecules are Ψ-octa-hedral; if more remote Pb⋯O inter-actions are also considered, the coordination number is increased to six for one mol-ecule and to seven for the other. Their coordination polyhedra are ill defined in t ...[more]

PMID: 22719341

Similar Datasets

Bis(μ-N-nitroso-N-phenyl-hydroxy-laminato)-κO,O':O';κO':O,O'-bis-[(N-nitroso-N-phenyl-hydroxy-laminato-κO,O')lead(II)].

Project description:The four cupferronate ions in the dinuclear title compound, [Pb(2)(C(6)H(5)N(2)O(2))(4)], O,O'-chelate to the two Pb(II) atoms; two of the four nitroso O atoms are also involved in bridging. The geometry of both five-coordinate Pb(II)atoms is distorted Ψ-octa-hedral; if another two longer inter-molecular Pb⋯O inter-actions [at 2.955 (1) and 3.099 (1) Å] are considered, the geometry is a distorted Ψ-square anti-prism.

| S-EPMC3052047 | biostudies-literature

Bis(N-nitroso-N-phenyl-hydroxy-laminato-κO,O')(1,10-phenanthroline-κN,N')lead(II).

Project description:The two cupferronate ions and the N-heterocycle in the mononuclear title compound, [Pb(C(6)H(5)N(2)O(2))(2)(C(12)H(8)N(2))], O,O'- and N,N'-chelate to the Pb(II) atom, the geometry of which is a distorted Ψ-penta-gonal bipyramid.

| S-EPMC3052161 | biostudies-literature

Bis(N-nitroso-N-pentyl-hydroxy-laminato-κ(2) O,O')copper(II).

Project description:In the centrosymmetric title compound, [Cu(C5H11N2O2)2], the Cu(2+) ion, located on an inversion centre (Wyckoff position 2b), is in a square-planar environment, surounded by four O atoms of the N-O groups of two N-nitroso-N-pentyl-hydroxy-laminate ligands [Cu-O = 1.9042 (17) and 1.9095 (16) Å]. The hy-droxy-laminate monoanions are bidentate chelating ligands. The Cu(2+) cations form stacks along [010], with inter-molecular Cu⋯N contacts of 3.146 (2) and 3.653 (2) Å.

| S-EPMC3998568 | biostudies-literature

Di-aqua-bis-[N-(2-fluoro-benz-yl)-N-nitroso-hydroxy-laminato-κ(2) O,O']nickel(II).

Project description:In the centrosymmetric title compound, [Ni(C7H6FN2O2)2(H2O)2], the Ni(II) cation is in a slightly distorted octa-hedral environment and is surrounded by four O atoms from the N-O groups of the organic ligands [Ni-O = 2.0179 (13) and 2.0283 (12) Å], and two water mol-ecules [Ni-O = 2.0967 (14) Å]. The N-(2-fluoro-benz-yl)-N-nitroso-hydroxy-laminate monoanions act as bidentate chelating ligands. In the crystal, the Ni cations in the columns are shifted in such a way that the coordinated water mol-ecules are involved in the formation of hydrogen bonds with the O atoms of the organic species of neighbouring mol-ecules. Thus, a two-dimensional network parallel to (100) is built up by hydrogen-bonded molecules.

| S-EPMC3998445 | biostudies-literature

Diaquabis-[3-(hydroxy-imino-)butanoato]nickel(II): a triclinic polymorph.

Project description:The title centrosymmetric mononuclear complex, [Ni(C(4)H(6)NO(3))(2)(H(2)O)(2)], is a polymorph of the previously reported complex [Dudarenko et al. (2010 ?). Acta Cryst. E66, m277-m278]. The Ni(II) atom, lying on an inversion center, is six-coordinated by two carboxyl-ate O atoms and two oxime N atoms from two trans-disposed chelating 3-hydroxy-imino-butanoate ligands and two axial water mol-ecules in a distorted octa-hedral geometry. The hydr-oxy group forms an intra-molecular hydrogen bond with the coordinated carboxyl-ate O atom. The complex mol-ecules are linked in stacks along [010] by a hydrogen bond between the water O atom and the carboxyl-ate O atom of a neighboring mol-ecule. The stacks are further linked by O-H?O hydrogen bonds into a layer parallel to (001).

| S-EPMC2983669 | biostudies-literature

A second triclinic polymorph of azimsulfuron.

Project description:The title compound, C13H16N10O5S (systematic name: 1-(4,6-di-meth-oxypyrimidin-2-yl)-3-{[1-methyl-4-(2-methyl-2H-tetra-zol-5-yl)pyrazol-5-yl]sulfonyl}urea), is a second triclinic polymorph of this crystal [for the other, see: Jeon et al., (2015 ▸). Acta Cryst. E71, o470-o471]. There are two mol-ecules, A and B, in the asymmetric unit; the dihedral angles between the pyrazole ring and the tetra-zole and di-meth-oxy-pyrimidine ring planes are 72.84 (10) and 37.24 (14)°, respectively (mol-ecule A) and 84.38 (9) and 26.09 (15)°, respectively (mol-ecule B). Each mol-ecule features an intra-molecular N-H⋯N hydrogen bond. In the crystal, aromatic π-π stacking inter-actions [centroid-centroid separations = 3.9871 (16), 3.4487 (14) and 3.5455 (16) Å] link the mol-ecules into [001] chains. In addition, N-H⋯N, N-H⋯O, C-H⋯O and C-H⋯N hydrogen bonds occur, forming a three-dimensional architecture. We propose that the dimorphism results from differences in conformations and packing owing to different inter-molecular inter-actions, especially aromatic π-π stacking.

| S-EPMC5050778 | biostudies-literature

Trithia-cyanuric acid: a second triclinic polymorph.

Project description:The title compound, C(3)H(3)N(3)S(3), is a triclinic modification. The other reported modification crystallizes with just one mol-ecule in the asymmetric unit, [Guo et al. (2006 ▶). Cryst. Growth Des.6, 846-848] and was solved by power X-ray diffraction data. The present modification has Z' = 2. In the crystal, mol-ecules are linked by strong intra-molecular N-H⋯S hydrogen bonds with set graph-motif R(2) (2)(8). In both mol-ecules, all of the N atoms and two of the S atoms are involved in hydrogen bonding, with an average H⋯S distance of 2.58 Å and N-H⋯S angles in the range 163-167°. π-π stacking inter-actions are not observed. In the solid state, the mol-ecules exist in the thione form. The mol-ecular and supra-molecular properties are similar in both polymorphs.

| S-EPMC3007918 | biostudies-literature

1,3-Bis(3-methyl-phen-yl)thio-urea: triclinic polymorph.

Project description:The title compound, C(15)H(16)N(2)S, crystallizes with two molecules in the asymmetric unit. The crystallographic behaviour of the two isomers is different. The mol-ecules are dimerized, forming an R(2) (2)(8) ring motif due to inter-molecular N-H?S hydrogen bonds. C-H?S hydrogen bonds form R(2) (2)(12) ring motifs. In one molecule, the dihedral angle between the benzene rings is 62.54?(6)°, whereas in the other it is 79.54?(6)°. The H atoms of one of the methyl groups in each molecule are disordered over two sites, with occupancy ratios of 0.52?(3):0.48?(3) and 0.60?(3):0.40?(3).

| S-EPMC2968578 | biostudies-literature

Bis(3-hydroxy-phenyl-acetato-?O,O')bis-(1H-imidazole-?N)nickel(II).

Project description:In the title mononuclear complex, [Ni(C(8)H(7)O(3))(2)(C(3)H(4)N(2))(2)], the Ni(II) atom, lying on a twofold rotation axis, is coordinated by four carboxyl-ate O atoms from two bidentate 3-hydroxy-phenylacetato ligands and two N atoms from two imidazole mol-ecules in a distorted octa-hedral geometry. A three-dimensional network is formed via inter-molecular O-H?O and N-H?O hydrogen bonds and ?-? stacking inter-actions between the imidazole and benzene rings of neighboring mol-ecules [centroid-centroid distance = 3.856?(2)?Å].

| S-EPMC2968559 | biostudies-literature

A second triclinic polymorph of (1-ammonio-1-phosphono-eth-yl)phospho-nate.

Project description:The asymmetric unit of the second polymorph of the title compound, C(2)H(9)NO(6)P(2), contains one mol-ecule existing as a zwitterion. The N atom of the ammonio group is protonated and one of the phospho-nic acid groups is deprotonated. Bond lengths and angles are similar in both polymorphs. Besides the differences in cell parameters, the most significant structural difference between this structure and that of the first polymorph [Dudko, Bon, Kozachkova, Tsarik & Pekhno (2008 ▶), Ukr. Khim. Zh.74, 104-106] is the presence of strong symmetric hydrogen bonds between neighbouring phospho-nate groups. H atoms involved in these hydrogen bonds are located at inversion centres and O⋯O distances are observed in the range 2.458 (5)-2.523 (5) Å. These bonds and additional O-H⋯O and N-H⋯O hydrogen bonds inter-link the mol-ecules, giving a three-dimensional supromolecular network.

| S-EPMC3151912 | biostudies-literature

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