共查询到20条相似文献,搜索用时 5 毫秒
1.
P. Perez‐Lourido J. A. García‐Vzquez J. Romero P. Fernandez A. Sousa‐Pedrares A. Sousa 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(3):e101-e102
The title compound, [2‐Ph2P(O)C6H4S]2 or C36H28O2P2S2, obtained by electrochemical oxidation of 2‐(diphenylphosphino)benzenethiol, has twofold crystallographic symmetry. Principal dimensions include S—S 2.0212 (15) Å, S—C 1.786 (3) Å and C—S—S—C 81.34 (14)°. 相似文献
2.
F. Betül Kaynak Süheyla
zbey Turan
ztürk Erdal Erta 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(8):926-928
In the title compound, C17H10S5, the dithiine ring adopts a boat conformation while the dithiole ring has an envelope conformation. The phenyl groups are planar and make dihedral angles of 40.7 (2) and 59.8 (2)° with the best plane of the thiine ring. The shortest intermolecular S?S contact is 3.305 (2) Å. 相似文献
3.
Laurent F. Groux Davit Zargarian 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(8):e366-e367
The title compound, C23H24BP, crystallizes in the centrosymmetric space group P21/c, with one molecule in the asymmetric unit. The indene moiety is essentially planar. The P—B bond length is 1.923 (3) Å, which is within the expected range. 相似文献
4.
Jairo Quiroga Braulio Insuasty Rodrigo Abonia Pedro Hernndez Justo Cobo Manuel Nogueras Adolfo Snchez John Nicolson Low 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):1460-1461
The title compound, C25H19NO4S, (IV), was produced by a cyclocondensation reaction similar to that which had previously produced an unexpected product, thus giving a novel route for such reactions. The structure of (IV) contains two S(6) motifs formed by strong intramolecular O—H?O hydrogen bonds. Weak C—H?O hydrogen bonds form primary C(11), R(7) and R(8) motifs which combine to form a complex three‐dimensional network. 相似文献
5.
Abdurrahman engül Nevzat Karaday 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(8):o539-o541
The title compound, C27H27N5O3·H2O, is built up from pyrazolinone, phenyl and acetophenone oxime moieties. The 2‐phenyl substituent is nearly perpendicular to the pyrazolinone ring, with a dihedral angle of 87.66 (1)°. The acetophenone oxime moieties are twisted out of the pyrazolinone‐ring plane by 47.04 (1)°. The molecules in the crystal pack in an antiparallel fashion and are held together by hydrogen‐bonded water molecules and intermolecular O—H⋯O and O—H⋯N hydrogen bonds. 相似文献
6.
Anthony Linden Enas M. Awad Nehal M. Elwan Hamdi M. Hassaneen Heinz Heimgartner 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(2):o122-o124
Crystals of the title compound, C23H17ClN4O2·2.5H2O, contain channels filled with highly disordered water molecules. The best structure refinement was obtained by removing the solvent contribution from the intensity data and refining against a solvent‐free model. The central six‐membered ring of the quinolizine molecule has a slightly distorted screw‐boat conformation. 相似文献
7.
Andrei S. Batsanov Judith A. K. Howard 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(10):e467-e468
The title compound, C17H19FN+·Cl?, has an ionic structure, and cations and anions are linked into infinite chains by Cl?H—N—H?Cl hydrogen bonds. The absolute configuration (S) was confirmed. 相似文献
8.
Muharrem Diner Namk
zdemir brahim Ylmaz Alaaddin ukuroval Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(9):o674-o676
In the title compound, C17H20N2O3, the cyclobutane ring is puckered, with a dihedral angle of 19.11 (15)°. The 1‐phenyl and 3‐[1‐hydroxyimino‐2‐(succinimido)ethyl] groups are in cis positions. The molecules are linked by O—H⋯O and C—H⋯π(benzene) interactions, forming a two‐dimensional network. 相似文献
9.
Kamlakar Avasthi Diwan S. Rawat Sanjay Sarkhel Prakas R. Maulik 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(6):o325-o327
The title compound, 6‐methylsulfanyl‐1‐(3‐phenylpropyl)‐4,5‐dihydro‐1H‐pyrazolo[3,4‐d]pyrimidin‐4‐one, C15H16N4OS, crystallizes in space group Pbca, with two molecules of similar structure in the asymmetric unit. The molecular structure shows the absence of intramolecular stacking in the crystalline state, as indicated by earlier 1H NMR analysis in solution. In addition, the crystal packing reveals the formation of a layered structure, due mainly to intermolecular N—H?O=C hydrogen bonding and arene–arene interactions. 相似文献
10.
Mari Pretorius D. Bradley G. Williams Andreas Roodt Alfred Muller 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(6):o384-o386
The title compounds, Ph2PCH2N(H)Ph or C25H22NP and Ph2PCH2N(CH3)Ph or C26H24NP, respectively, are isomorphous, with calculated theoretical Tolman angles of 174 and 182°. 相似文献
11.
Kenneth W. Muir David G. Morris Karl S. Ryder Anastassios Varvoglis 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(7):o376-o377
The title disulfonyl‐stabilized pyridinium ylide, C5H5N+–C−(SO2C6H5)2 or C18H15NO4S2, contains a near planar NCS2 core. The structure suggests that the formal negative charge of the ylide C atom is delocalized to the S atoms rather than the N atom. Structural features of pyridinium ylides are briefly discussed. 相似文献
12.
The structure of the title compound, fac‐[ReBr(C14H12N2O)(CO)3]·CH4O, consists of neutral mononuclear molecular units of distorted octahedral geometry, with the three carbonyl donors in a facial orientation. The remaining coordination sites are occupied by the Br atom, the pyridine N atom and the ketone O‐atom donor of the ligand. The molecules pack in stacks of antiparallel tapes, with a network of classical (O—H⋯Br) and non‐classical (C—H⋯O) hydrogen bonds between the methanol solvent molecule and the complex molecule. 相似文献
13.
Francesco Nicol Giuseppe Bruno Rosario Scopelliti Silvana Grasso Angela Rao Maria Zappal 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(5):572-574
The title molecules, C15H9ClF2N2S and C16H12F2N2S, respectively, display the well known butterfly‐like conformation with a flat thiazolobenzimidazole system. In both compounds, the mean plane through the tricyclic system is almost perpendicular to the 2,6‐difluorophenyl ring. This arrangement of the aryl group is determined by two intramolecular hydrogen bonds and by an attractive F?S interaction. 相似文献
14.
Yi‐Zhi Li Jia‐Cheng Liu Zhi‐Ping Wang Qin‐Xi Li Gang‐Chun Sun Liu‐Fang Wang Chun‐Gu Xia 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):e286-e287
The title compound, [Ni(Ph2PCH2PPh2)2](ClO4)2, was synthesized and its structure determined crystallographically. The Ni atom lies on an inversion centre and is at the center of a square formed by four P atoms which are necessarily coplanar. The Ni—P distances are 2.2188 (5) and 2.2322 (5) Å, and the P—Ni—P angle is 73.12 (3)°. The unique perchlorate anion is not coordinated to the Ni atom. 相似文献
15.
Ayta Gürhan Gke Hayati Türkmen Muhittin Aygün Bekir etinkaya Canan Kazak 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(6):m254-m255
The title complex, [PdCl2(C19H22N2)(C18H15P)], shows slightly distorted square‐planar coordination of the palladium(II) metal center. The Pd—C bond distance between the N‐heterocyclic ligand and the metal atom is 2.008 (3) Å. The dihedral angle between the two dimethylphenyl ring planes is 33.17 (13)°. 相似文献
16.
Yang Peng Yi‐Zhi Li Song‐Song Bao Li‐Min Zheng 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(7):m302-m304
In the title compound, [Co(C2H8N2)3]2[Ru2(C2H4O7P2)2Cl2]Cl·3H2O, the building unit contains two crystallographically independent dinuclear [Ru2(hedp)2Cl2]5− anions, where hedp [viz. (1‐hydroxyethylidene)diphosphonate] serves as a bis‐chelating bridging ligand, two types of [Co(en)3]3+ cations, one uncoordinated Cl− anion and five water molecules of crystallization. The [Ru2(hedp)2Cl2]5− anions are connected to one another, forming one‐dimensional chains along the a axis. The [Co(en)3]3+ cations are located between these chains and lie across inversion centres. An extensive series of hydrogen bonds lead to the formation of a three‐dimensional supramolecular network structure, with channels generated along the [100] direction. The uncoordinated water molecules and Cl− anions reside in these channels. 相似文献
17.
Corinne Chaimbault Jean Michel Leger Jean‐Jacques Bosc Christian Jarry 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(1):e29-e30
The condensation reaction of 2‐amino‐5‐tert‐butyloxymethyl‐2‐oxazoline with ethyl cyano(ethoxymethylene)acetate led to the title cycloadduct. The structure indicates a delocalization in the pyrimidine ring. 相似文献
18.
Bruno Therrien Thomas R. Ward 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):e561-e561
To address the question of the role of chirality at the metal in enantioselective catalysis, a pseudo‐tetrahedral three‐legged piano‐stool complex has been prepared, i.e. [RuCl(C26H27N2P)](CF3SO3). Anchoring a phosphine and a pyrazole tether to an arene (PArN) yields, after η6:η1:η1 coordination to ruthenium, [{η6:η1:η1‐(PArN)}RuCl]+ as a 1:1 mixture of enantiomers. Unfortunately, all attempts to resolve the enantiomers failed. The structure solution revealed the presence of racemic crystals. 相似文献
19.
Vijayakumar N. Sonar Sean Parkin Peter A. Crooks 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(2):o78-o80
(Z)‐3‐(1H‐Indol‐3‐yl)‐2‐(3‐thienyl)acrylonitrile, C15H10N2S, (I), and (Z)‐3‐[1‐(4‐tert‐butylbenzyl)‐1H‐indol‐3‐yl]‐2‐(3‐thienyl)acrylonitrile, C26H24N2S, (II), were prepared by base‐catalyzed reactions of the corresponding indole‐3‐carboxaldehyde with thiophene‐3‐acetonitrile. 1H/13C NMR spectral data and X‐ray crystal structures of compounds (I) and (II) are presented. The olefinic bond connecting the indole and thiophene moieties has Z geometry in both cases, and the molecules crystallize in space groups P21/c and C2/c for (I) and (II), respectively. Slight thienyl ring‐flip disorder (ca 5.6%) was observed and modeled for (I). 相似文献
20.
Caroline Charlier Bernadette Norberg Laurence Goossens Jean‐Pierre Hnichart Franois Durant 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(9):o648-o652
Three related compounds containing a pyrazole moiety with vicinal phenyl rings featuring a methylsulfonyl substituent are described, namely 3‐methyl‐1‐[4‐(methylsulfonyl)phenyl]‐5‐phenyl‐1H‐pyrazole, C17H16N2O2S, ethyl 1‐[4‐(methylsulfonyl)phenyl]‐5‐phenyl‐1H‐pyrazole‐3‐carboxylate, C19H18N2O4S, and 1‐[4‐(methylsulfonyl)phenyl]‐3‐[3‐(morpholino)phenoxymethyl]‐5‐phenyl‐1H‐pyrazole, C27H27N3O4S. The design of these compounds was based on celecoxib, a selective cyclooxygenase‐2 (COX‐2) inhibitor, in order to study the influence of various substituents on COX‐2 and 5‐lipoxygenase (5‐LOX) inhibition. 相似文献