共查询到20条相似文献,搜索用时 15 毫秒
1.
Robert J. Hinkle Robert McDonald 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(2):o117-o121
The crystal structures of [(Z)‐2‐methylbut‐1‐en‐1‐yl][4‐(trifluoromethyl)phenyl]iodonium trifluoromethanesulfonate, C12H13F3I+·CF3O3S?, (I), (3,5‐dichlorophenyl)[(Z)‐2‐methylbut‐1‐en‐1‐yl]iodonium trifluoromethanesulfonate, C11H12Cl2I+·CF3O3S?, (II), and bis{[3,5‐bis(trifluoromethyl)phenyl][(Z)‐2‐methylbut‐1‐en‐1‐yl]iodonium} bis(trifluoromethanesulfonate) dichloromethane solvate, 2C13H12F6I+·2CF3O3S?·CH2Cl2, (III), are described. Neither simple acyclic β,β‐dialkyl‐substituted alkenyl(aryl)idonium salts nor a series containing electron‐deficient aryl rings have been described prior to this work. Compounds (I)–(III) were found to have distorted square‐planar geometries, with each I atom interacting with two trifluoromethanesulfonate counter‐ions. 相似文献
2.
Zhong‐Lu You Hai‐Liang Zhu Wei‐Sheng Liu 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(12):m620-m622
The title compound, {[Ag2(C4H4N2)3](CF3SO3)2·2H2O}n, is a polymeric pyrazine–silver(I) complex. Each AgI ion is three‐coordinated by N atoms of three different pyrazine ligands, forming a T‐shaped coordination configuration. In the crystal structure, uncoordinated water molecules are linked to trifluoromethanesulfonate anions through intermolecular O—H⋯O hydrogen bonds. There are weaker Ag⋯O interactions involving the water and sulfonate O atoms. 相似文献
3.
Hai‐Ying Wang Shyh‐Jiun Liu Ru‐Ji Wang Chan‐Cheng Su 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(12):m512-m515
The organic ligands 4‐methyl‐1H‐imidazole and 2‐ethyl‐4‐methyl‐1H‐imidazole react with Cu(CF3SO3)2·6H2O to give tetrakis(5‐methyl‐1H‐imidazole‐κN3)copper(II) bis(trifluoromethanesulfonate), [Cu(C4H6N2)4](CF3SO3)2, and aquatetrakis(2‐ethyl‐5‐methyl‐1H‐imidazole‐κN3)copper(II) bis(tri fluoromethanesulfonate), [Cu(C6H10N2)4(H2O)](CF3SO3)2. In the former, the Cu atom has an elongated octahedral coordination environment, with four imidazole rings in equatorial positions and two trifluoromethanesulfonate ions in axial positions. This conformation is similar to those in the analogous complexes tetrakis(imidazole)copper(II) trifluoromethanesulfonate and tetrakis(2‐methyl‐1H‐imidazole)copper(II) trifluoromethanesulfonate. In the second of the title compounds, the ethyl groups block the central Cu atom, and a square‐pyramidal coordination environment is formed around the Cu atom, with the substituted imidazole rings in the basal positions and a water molecule in the axial position. 相似文献
4.
Christopher Glidewell John N. Low Susan A. McWilliam Janet M. S. Skakle James L. Wardell 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(2):o97-o99
In 2‐trifluoromethyl‐4‐nitroaniline, C7H5F3N2O2, (I), the molecules lie across a mirror plane in space group Pnma. The molecules are linked by paired N—H?O hydrogen bonds to form a C(8)[R(6)] chain of rings, pairs of which are linked into a molecular ladder by a single C—H?O hydrogen bond. The isomeric 3‐trifluoromethyl‐4‐nitroaniline, (II), has Z′ = 2 in space group P21/c. Each molecule is linked to four others by N—H?O hydrogen bonds to form sheets built from alternating R(12) and R(32) rings. 相似文献
5.
I. I. Ponomarev A. Yu. Kovalevsky 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):260-262
Each of the three title compounds, namely 6,6′‐methylenebis(2‐methyl‐4H‐3,1‐benzoxazin‐4‐one), C19H14N2O4, 6,6′‐methylenebis(2‐trifluoromethyl‐4H‐3,1‐benzoxazin‐4‐one), C19H8F3N2O4, and 6,6′‐bi(2‐trifluoromethyl‐4H‐3,1‐benzoxazin‐4‐one), C18H6F6N2O4, contains two planar benzoxazinone fragments. In the first two compounds, these planes are virtually perpendicular to each other, while the third compound is planar overall. The electronic effects of the substituent groups on the oxazine moiety result in distortion of the bond angles at the C atoms of the C=O and C=N bonds, and in redistribution of electronic density in the oxazine rings. The latter leads to different bond lengths within this ring in the three molecules. All the molecules form stacks in their crystals with distances of 3.2–3.6 Å between adjacent molecules in a stack. 相似文献
6.
Jan Janczak Genivaldo Julio Perptuo 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(7):873-875
The crystals of a new melaminium salt, 2,4,6‐triamino‐1,3,5‐triazine‐1,3‐diium bis(4‐hydroxybenzenesulfonate) dihydrate, C3H8N62+·2C6H5O4S?·2H2O, are built up from doubly protonated melaminium(2+) residues, dissociated p‐phenolsulfonate anions and water molecules. The doubly protonated melaminium dication lies on a twofold axis. The hydroxyl group of the p‐hydroxybenzenesulfonate residue is roughly coplanar with the phenyl ring [dihedral angle 13 (2)°]. A combination of ionic and donor–acceptor hydrogen‐bond interactions link the melaminium and p‐hydroxybenzenesulfonate residues and the water molecules to form a three‐dimensional network. 相似文献
7.
Dens Konya Christian Philouze Yves Gimbert Andrew E. Greene 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(2):o108-o111
Three chiral electron‐deficient phosphine ligands, [(4R,15R)‐,3‐bis(trifluoromethanesulfonyl)perhydro‐1,3,2‐benzodiazaphosphol‐2‐yl]diethylamine, C12H20F6N3O4PS2, (IIIa), [(4R,5R)‐1,3‐bis(trifluoromethanesulfonyl)perhydro‐1,3,2‐benzodiazaphosphol‐2‐yl]dimethylamine, C10H16F6N3O4PS2, (IIIb), and bis[(4R,5R)‐1,3‐bis(trifluoromethanesulfonyl)perhydro‐1,3,2‐benzodiazaphosphol‐2‐yl]methylamine, (IV), as the chloroform solvate, C17H23F12N5O8P2S4·0.98CHCl3, have been prepared from (1R,2R)‐N,N′‐bis(trifluoromethanesulfonyl)‐1,2‐cyclohexanediamine and diethyl phosphoramidous dichloride, dimethyl phosphoramidous dichloride or methyl imidodiphosphorus tetrachloride. The π‐acceptor abilities of these new types of ligands have been evaluated by X‐ray determination of the P—N bond lengths; it has been found that the most promising ligand is the bis(phosphine) (IV). 相似文献
8.
John Bacsa Hanhua Zhao Kim R. Dunbar 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(12):m561-m564
Two new iron–oxo clusters, viz. di‐μ‐trifluoroacetato‐μ‐oxo‐bis[(2,2′‐bipyridine‐κ2N,N′)(trifluoroacetato‐κO)iron(III)], [Fe2O(CF3CO2)4(C10H8N2)2], and bis(2,2′‐bipyridine)di‐μ3‐oxo‐hexa‐μ‐trifluoroacetato‐bis(trifluoroacetato)tetrairon(III) trifluoroacetic acid solvate, [Fe4O2(CF3CO2)8(C10H8N2)2]·CF3CO2H, contain dinuclear and tetranuclear FeIII cores, respectively. The FeIII atoms are in distorted octahedral environments in both compounds and are linked by oxide and trifluoroacetate ions. The trifluoroacetate ions are either bridging (bidentate) or coordinated to the FeIII atoms via one O atom only. The fluorinated peripheries enhance the solubility of these compounds. Formal charges for all the Fe centers were assigned by summing valences of the chemical bonds to the FeIII atom. 相似文献
9.
Marina S. Fonari Yurii A. Simonov Mark Botoshansky Eduard V. Ganin Arkadii A. Yavolovskii 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(2):o88-o90
In the title hydrated adduct, 1,4,10,13‐tetraoxa‐7,16‐diazoniacyclooctadecane bis(4‐aminobenzenesulfonate) dihydrate, C12H28N2O42+·2C6H6NO3S−·2H2O, formed between 7,16‐diaza‐18‐crown‐6 and the dihydrate of 4‐aminobenzenesulfonic acid, the macrocyclic cations lie across centres of inversion in the orthorhombic space group Pbca. The anions alone form zigzag chains, and the cations and anions together form sheets that are linked via water molecules and anions to form a three‐dimensional grid. 相似文献
10.
R. Eric Banks Mohamed K. Besheesh Robin G. Pritchard 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(4):m141-m143
The structures of N‐fluoropyridinium trifluoromethanesulfonate, C5H5FN+·CF3O3S−, (I), and 1‐fluoro‐2,4,6‐trimethoxy‐1,3,5‐triazinium hexafluoroantimonate, (C6H9FN3O3)[SbF6], (II), are presented. The N—F bond lengths in (I), a well known electrophilic fluorinating agent, and its novel analogue, (II), are 1.357 (4) and 1.354 (4) Å, respectively. 相似文献
11.
Srinivasulu Aitipamula Ashwini Nangia Ram Thaimattam Mariusz Jasklski 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):o481-o484
In tris(4‐hydroxyphenyl)methane (or 4,4′,4′′‐methanetriyltriphenol), C19H16O3, molecules are connected by O—H⃛O hydrogen bonds [O⃛O = 2.662 (2) and 2.648 (2) Å] into two‐dimensional square networks that are twofold interpenetrated. In tris(4‐hydroxyphenyl)methane–4,4′‐bipyridine (1/1), C19H16O3·C10H8N2, trisphenol molecules form rectangular networks via O—H⃛O [O⃛O = 2.694 (3) Å] and C—H⃛O [C⃛O = 3.384 (3) Å] hydrogen bonds. Bipyridine molecules hydrogen bonded to phenol moieties [O⃛N = 2.622 (3) and 2.764 (3) Å] fill the voids to complete the structure. 相似文献
12.
Suchada Chantrapromma Anwar Usman Hoong‐Kun Fun Bo‐Long Poh Chatchanok Karalai 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(11):o675-o677
In the title adduct, 1,3,5,7‐tetraazatricyclo[3.3.1.13,7]decane–4‐nitrobenzene‐1,2‐diol–water (1/2/1), C6H12N4·2C6H5NO4·H2O, the hexamethylenetetramine molecule acts as an acceptor of intermolecular O—H?N hydrogen‐bonding interactions from the water molecule and the hydroxy groups of one of the two symmetry‐independent 4‐nitrocatechol molecules. The structure is built from molecular layers which are stabilized by three intermolecular O—H?O, two intermolecular O—H?N and four intermolecular C—H?O hydrogen bonds. The layers are further interconnected by one additional intermolecular O—H?N and two intermolecular C—H?O hydrogen bonds. 相似文献
13.
Rinat Shoshnik Helena Elengoz Israel Goldberg 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(4):m187-m189
In the title compound, diaquabis(1,4‐di‐4‐pyridyl‐2,3‐diaza‐1,3‐butadiene)dimethanolzinc(II) bis(perchlorate) 1,4‐di‐4‐pyridyl‐2,3‐diaza‐1,3‐butadiene methanol 1.72‐solvate 1.28‐hydrate, [Zn(C12H10N4)2(CH4O)2(H2O)2](ClO4)2·C12H10N4·1.72CH4O·1.28H2O, determined at ca 110 K, the Zn cation and the extended dipyridyl ligand both lie across inversion centres in space group P. The structure consists of a network arrangement of the constituent species stabilized by a combination of coordination, hydrogen bonding and π–π forces. Uncoordinated methanol and water solvent molecules occupy the otherwise void spaces within and between the networks. 相似文献
14.
A. Gueddi B. Mernari M. Giorgi M. Pierrot 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(10):e426-e428
The reaction of the diazine ligand 3,5‐bis(2‐pyridinyl)‐1,3,4‐oxadiazole (pod, C12H8N4O), with Cu(CF3SO3)2 or Ni(ClO4)2 afforded the title complexes diaquabis[3,5‐bis(2‐pyridinyl)‐1,3,4‐oxadiazole‐N2,N3]copper(II) bis(trifluoromethanesulfonate), [Cu(pod)2(H2O)2](CF3SO3)2, and diaquabis[3,5‐bis(2‐pyridinyl)‐1,3,4‐oxadiazole‐N2,N3]nickel(II) diperchlorate, [Ni(pod)2(H2O)2](ClO4)2. Both complexes present a crystallographically centrosymmetric mononuclear cation structure which consists of a six‐coordinated CuII or NiII ion with two pod molecules acting as bidentate ligands and two axially coordinated water molecules. 相似文献
15.
Hubert Wadepohl Hans Pritzkow 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(4):383-384
The title compound, [Ag(CF3O3S)(C6H6)], has been synthesized and characterized by low‐temperature single‐crystal X‐ray diffraction. The complex is polymeric, with a network of trifluoromethanesulfonate anions bridging the silver cations. The terminal planar benzene ligand is asymmetrically η2‐coordinated to the Ag. 相似文献
16.
Tadashi Yamaguchi Fumie Yamazaki Tasuku Ito 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(4):m213-m214
(1,4,7‐Trithiacyclononane)silver trifluoromethanesulfonate crystallizes in a tetrameric form from nitromethane, to give the title compound, [Ag4(C6H12S3)4](CF3SO3)4·2CH3NO2. The complex cation consists of four [AgL]+ units (L is 1,4,7‐trithiacyclononane), with four Ag—S—Ag bridges forming a cyclic tetramer. The almost planar Ag4S4 ring takes an octagonal form. 相似文献
17.
Krishnan Ravikumar Balasubramanian Sridhar 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(8):o478-o482
Moxifloxacin, a novel fluoroquinolone with a broad spectrum of antibacterial activity, is available as the solvated monohydrochloride salt 7‐[(S,S)‐2‐aza‐8‐azoniabicyclo[4.3.0]non‐8‐yl]‐1‐cyclopropyl‐6‐fluoro‐8‐methoxy‐4‐oxo‐1,4‐dihydroquinoline‐3‐carboxylic acid chloride–water–methanol (2/1/1), C21H25FN3O4+·Cl−·0.5H2O·0.5CH3OH. The asymmetric unit contains two cations, two chloride ions, a molecule of water and one methanol molecule. The two cations adopt conformations that differ by an almost 180° rotation with respect to the piperidinopyrrolidine side chain. The cyclopropyl ring and the methoxy group are not coplanar with the quinoline ring system. The carboxylic acid function, the protonated terminal piperidyl N atom, the water molecule, the chloride ion and the methanol molecule participate in O—H⋯O, O—H⋯Cl, N—H⋯O and N—H⋯Cl hydrogen bonding, linking the molecules into extended two‐dimensional networks. 相似文献
18.
Robert W. Janes 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(3):362-364
The title compound, C9H8FN5·C3H7NO, contains two independent complexes in the asymmetric unit, each consisting of one 3,5‐diamino‐6‐(2‐fluorophenyl)‐1,2,4‐triazine molecule and one dimethylformamide solvent molecule. One triazine molecule is disordered over two conformations within the crystal, the occupancies being 62 (1) and 38 (1)%. The phenyl ring of this molecule resolves into two conformations rotated by almost 180° about the bridging bond between the two rings, while the triazine rings approximately superimpose on each other. The triazine molecules of the asymmetric unit differ in the dihedral angles between their respective phenyl and triazine ring planes, these being 57.6 (2)° for the fully occupied, and 76.9 (6) and 106.8 (8)° for the partially occupied molecules. An extensive network of hydrogen bonds maintains the crystal structure. 相似文献
19.
R. Chitra Pascal Roussel R. R. Choudhury 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(9):o547-o549
The title complex, 2CH4N2S·C4H6O4, is a host–guest system. The asymmetric unit consists of one complete thiourea molecule and one‐half of a dimethyl oxalate molecule lying on an inversion centre. The host thiourea molecules are connected to form zigzag chains by N—H⋯S hydrogen bonds. The guest dimethyl oxalate molecules provide O‐atom acceptors for N—H⋯O hydrogen bonds, thus interconnecting the chains of thiourea molecules to form completely connected sheets. The reduction in temperature from 300 to 100 K leaves the structure unchanged and still isostructural with that previously determined for the analogous thiourea–diethyl oxalate (2/1) complex. It does, however, induce closer packing of the molecules, general shrinkage of the unit cell and shortening of the hydrogen bonds, these last two to the extent of 1–2%. 相似文献
20.
Michael Yen‐Nan Chiang Jing‐Yun Wu Wen‐Feng Zeng Duan‐Jun Xu 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(12):m523-m525
The solid‐state structure of the first reported homoleptic copper di‐2‐pyridylphosphinate complex shows an extremely large `z‐out' tetragonal distortion, with an axial Cu⋯O distance of 2.430 (2) Å. The title complex, [Cu(C10H8N2O2P)2]·2CH2Cl2 or Cu[py2P(O)O]2·2CH2Cl2, comprises two di‐2‐pyridylphosphinate ligands coordinated to the central copper(II) ion, which sits on an inversion center. The pyridyl rings of one ligand are trans to the pyridyl rings of their symmetry‐related counterpart. The two trans py–Cu–py moieties are coplanar, as required by the inversion symmetry. A disordered dichloromethane solvent molecule is cocrystallized in the asymmetric unit cell. 相似文献