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2-Carboxy-1-phenylethanaminium nitrate
Wen-Xian Liang,Xiao-Wei Chu,Zhi-Rong Qu
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809042792
Abstract: In the title salt, C9H12NO2+·NO3 , the cation and anion are linked by a bifurcated N—H...(O,O) hydrogen bond. The crystal packing is stabilized by intermolecular N—H...O, O—H...O and C—H...O hydrogen bonds, which connect neighbouring cations and anions, resulting in a two-dimensional network.
2-Carboxy-1-(3-nitrophenyl)ethanaminium perchlorate  [cached]
Wen-Xian Liang,Yan Li,Gang Wang,Zhi-Rong Qu
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536809051319
Abstract: In the cation of the title compound, C9H11N2O4+·ClO4 , the conformation is stabilized by an intramolecular N—H...O hydrogen bond. In the crystal packing, centrosymmetrically related cations interact through intermolecular O—H...O hydrogen bonds involving the carboxy groups, forming dimers. The dimers and the perchlorate anions are further linked into layers parallel to the ab plane by C—H...O and N—H...O hydrogen-bonding interactions.
(±)-Bis(1-carboxy-2-phenylethanaminium) hexafluorosilicate(VI)  [cached]
Ratiba Belhouas,Sofiane Bouacida,Chaouki Boudaren,Jean-Claude Daran
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812021587
Abstract: The asymmetric unit of the title fluorosilicate salt, 2C9H12NO2+·SiF62 , consists of a phenylalaninium cation and half of a fluorosilicate anion, the Si atom being located on an inversion center. In the crystal, all of the F atoms act as hydrogen-bond acceptors and link the cations through different graph-set motifs, forming layers developing parallel to (100).
2-Carboxy-1-(3-nitrophenyl)ethanaminium perchlorate  [cached]
Wen-Xian Liang
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536809052167
Abstract: In the title compound, C9H11N2O4+·ClO4 , the organic cations form centrosymmetric dimers via a pair of O—H...O hydrogen bonds between the carboxyl groups. In the crystal, N—H...O interactions between the protonated amine group and the perchlorate anions and the nitro group connect the components into a two-dimensional network parallel to (001).
The structure of 1,1,3-trimethyl-Δ2- pyrazolinium perchlorate: An X-ray crystallographic and GIAO/DFT multinuclear NMR study  [PDF]
Glenn P. A. Yap,Ibon Alkorta,José Elguero,Nadine Jagerovic
Spectroscopy: An International Journal , 2004, DOI: 10.1155/2004/258712
Abstract: The crystal and molecular structure of 1,1,3-trimethyl-Δ2-pyrazolinium perchlorate has been determined and compared with those of other pyrazolinium salts (both 1,1 and 1,2-substituted). Reported 13C and 15N chemical shifts for a series of related pyrazolines have been compared with GIAO/DFT calculations, with excellent agreement. The combination of the biological properties of pyrazolines with those of the perchlorate anion in the same molecule will be discussed.
2-[(2-Hydroxybenzyl)amino]pyrazinium perchlorate–2-[(pyrazin-2-ylamino)methyl]phenol (1/1)  [cached]
Shan Gao,Seik Weng Ng
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812031558
Abstract: In the crystal structure of the title co-crystal, C11H12N3O+·ClO4 ·C11H11N3O, the perchlorate ion is disordered about a twofold rotation axis with the Cl atom located on the twofold rotation axis; the 2-[(2-hydroxybenzyl)amino]pyrazinium cation and the neutral 2-[(pyrazin-2-ylamino)methyl]phenol molecule are disordered about the rotation axis in a 1:1 ratio. These two are connected by a pyrazine–pyrazine N1—H...N4 hydrogen bond. The cation, whose two aromatic rings are twisted along the –CH2—NH– bond by 76.8 (1)°, is a hydrogen-bond donor to the perchlorate ion through the N atom of this link.
{μ-1,5-Bis[(E)-1-(2-pyridyl)ethylidene]carbonohydrazidato(1−)}bis[chloridomethanolcopper(II)] perchlorate
Wei Huang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809040471
Abstract: The title dinuclear copper complex, [Cu2(C15H15N6O)Cl2(CH3OH)2]ClO4, was prepared by the reaction of copper(II) chloride with bis[1-(2-pyridyl)ethylidene]carbonohydrazide in the presence of sodium perchlorate in a methanol solution. It features a mono-deprotonated bis-tridentate ligand, which coordinates to two independent CuII ions, one of which is coordinated by pyridyl N, hydrazyl N and carbonyl O atoms. The second CuII ion is coordinated by the pyridyl N and two hydrazyl N atoms from different hydrazyl groups. The coordination environments of both CuII ions are completed by a chloride ion and a methanol molecule. The dihedral angle between the pyridyl groups is 27.46 (10)°. The crystal packing is stabilized by O—H...O(perchlorate), O—H...Cl and N—H...Cl hydrogen bonding.
Tris(1,10-phenanthroline-κ2N,N′)ruthenium(II) bis(perchlorate)  [cached]
Mariana Kozlowska,Pawel Rodziewicz,Diana Malgorzata Brus,Justyna Czyrko
Acta Crystallographica Section E , 2012, DOI: 10.1107/s1600536812048428
Abstract: The asymmetric unit of the title compound, [Ru(C12H8N2)3](ClO4)2, contains one octahedrally coordinated RuII cation of the ruthenium-phenanthroline complex and three differently occupied perchlorate anions: two, denoted A and B, are located on the twofold axis while another, denoted C, is positioned in the proximity of the twofold screw axis. Perchlorate anions B and C are severely disordered. The occupancies of the two major conformers of anion B refined to 0.302 (6) and 0.198 (6). Perchlorate ion C was modeled in two alternate conformations which refined to occupancies of 0.552 (10) and 0.448 (10).
N,N′-Bis(2-ammoniobenzyl)ethane-1,2-diammonium–nitrate–perchlorate (1/1.5/2.5)
Luis Angel Garza Rodríguez,Sylvain Bernès,Blanca Nájera Martínez,Perla Elizondo Martínez
Acta Crystallographica Section E , 2009, DOI: 10.1107/s160053680904519x
Abstract: The title compound, C16H26N44+·2.5ClO4 ·1.5NO3 , is an organic salt in which the cation is a fully protonated tetramine. The cation lies on an inversion center and, as a consequence, both benzene rings are parallel. The central chain is found in an all-trans arrangement, a conformation different from that observed in the crystal structure of the non-protonated molecule. The charges are balanced by a mixture of nitrate and perchlorate ions. One site is occupied by an ordered perchlorate ion, while the other contains both nitrate and perchlorate ions, with occupancies of 0.75 and 0.25, respectively. In the crystal, the NH2+ groups of the cation form N—H...O hydrogen bonds with the anions. The NH3+ groups also behave as donor groups, allowing the building of chains along [100], alternating cations and disordered anions being connected via N—H...O hydrogen bonds.
Chlorido[2,2′-(oxydimethylene)dipyridine]copper(II) perchlorate–aquachlorido[2,2′-(oxydimethylene)dipyridine]copper(II) perchlorate (1/1)
Hong Li,Long Miao Xie,Shi Guo Zhang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809027123
Abstract: The asymmetric unit of the title compound, [CuCl(C12H12N2O)][CuCl(C12H12N2O)(H2O)](ClO4)2, contains two different discrete cations. In one cation, the CuII ion is coordinated in a slightly distorted square-planar geometry, while in the other the CuII ion is in a slightly distorted square-pyramidal environment. In the crystal structure, there are O—H...O hydrogen bonds between coordinated water molecules and perchlorate anions. Both types of cations are linked into one-dimensional chains along the b axis by weak electrostatic Cu...Cl interactions, with Cu...Cl distances of 2.8088 (16) and 3.2074 (17) .
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