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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

trans-Bis[bis(diphenylphosphanyl)methane-κ2P,P′]dichloridoruthenium(II): a triclinic polymorph

Project description: Not available

| S-EPMC10833132 | 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

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