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ABSTRACT: In the title compound, C2H5N3O3, the hydroxamic group adopts an anti orientation with respect to the hydrazide group. In the crystal, molecules are connected by N—H...O and O—H...N hydrogen bonds into zigzag chains along the c axis.
Acta Crystallographica Section E. 01/2010;
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ABSTRACT: In the title compound, [Pd(C5H14N2O3P)Cl]·H2O, the Pd(II) atom shows a slightly distorted square-planar geometry and forms two five-membered metallacycles, which both exhibit half-chair conformations. The crystal structure consists of layers propogating in the [100] direction which are connected into a three-dimensional network by strong N—H...Cl, N—H...O and O—H...O hydrogen bonds.
Acta Crystallographica Section E. 01/2010;
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ABSTRACT: The title compound, (H3O)[Pd(C2H7NO6P2)(C2H8NO6P2)]·3H2O, was synthesized by the reaction of [Pd(H2O)4](NO3)2 with 1-aminoethane-1,1-diyldiphosphonic acid in aqueous solution. The asymmetric unit contains one molecule of the complex existing as an anion, an oxonium counter-ion and three solvent water molecules. The PdII ion occupies a position on a pseudo-twofold axis, which is not realized crystallographically. The slightly distorted square-planar coordination environment of the PdII ion consists of the O atoms from two phosphonic acid groups and two N atoms of the amino groups in cis positions. The crystal structure displays N—H...O and O—H...O hydrogen bonding, which creates a wide three-dimensional network.
Acta Crystallographica Section E. 01/2010;
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ABSTRACT: The crystal structure of potassium magnesium niobium oxide phosphate, KMg1/3Nb2/3OPO4, which was described in the space group P4322 [McCarron & Calabrese, (1993). J. Solid State Chem. 102, 354–361], has been redetermined in the revised space group P41. Accordingly, the assignment of the space group P4322 and, therefore, localization of K at a single half-occupied position, as noted in the previous study, proved to be an artifact. As a consequence, two major and two minor positions of K are observed due to the splitting along [001], as first noted for KTiOPO4 structure analogues. It has been shown that the geometry of the {MII1/3Nb2/3O6/2}∞ framework is almost unaffected by the lowering of symmetry.
Acta Crystallographica Section E. 01/2010;
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ABSTRACT: The title compound, NH4+·C5H14NO6P2−, was obtained from 1-ammonio-1-phosphonopentane-1-phosphonic acid and ammonium hydroxide in aqueous solution. The asymmetric unit of title compound contains one molecule, which consists of an ammonium cation and an aminodiphosphonic anion with the H atoms transferred from the phosphonic acid group to the amino group. The crystal structure shows a three-dimensional network of O—H...O and N—H...O hydrogen bonds which stabilize the structure.
Acta Crystallographica Section E. 01/2009;
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ABSTRACT: Yellow plate-like shaped crystals of the title compound, [Pd(C9H10N3S)2], were obtained by ligand-exchange reaction between palladium(II) acetylacetonate and the corresponding organic reagent at room temperature. The PdII atom shows a slightly distorted square-planar coordination geometry consisting of two ligand molecules in a cis conformation that bind in their thiolic tautomeric form. Weak intermolecular Pd...H interactions with Pd—H distances of 3.328 (2) Å were observed in the crystal structure. The three-dimensional network of the crystal structure is realized by weak intermolecular C—H...N, N—H...N and C—H...S hydrogen bonds.
Acta Crystallographica Section E. 01/2009;
