共查询到20条相似文献,搜索用时 15 毫秒
1.
Li Xu Jian‐Hao Zhou Xue‐Tai Chen Xiao‐Zeng You 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(8):o513-o514
The title compound, C18H18N4S4·2C3H7NO, crystallizes with the dibenzyl dihydrazinecarbodithioate molecule residing on a crystallographic inversion centre. The molecule adopts a trans conformation with respect to the central C—C single bond. The dihedral angle between the phenyl group and the thiothiosemicarbazone unit is 74.1 (1)°. 相似文献
2.
Anthony Linden Andreas Gebert Heinz Heimgartner 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(6):764-766
The tetrathiane ring of the title compound, C26H16S4, has a chair conformation and the molecule has approximate C2 symmetry. Each of the two fluorene ring systems is virtually planar, with the ring planes intersecting at an angle of 67.58 (5)°. This novel compound has been formed as a side product from the treatment of 9H‐fluorene‐9‐thione with methyl N‐[(benzylidene)phenyl]glycinate in the presence of LiBr and 1,6‐diazabicyclo[5.4.0]undecane. 相似文献
3.
David G. Billing Cedric W. Holzapfel Kevin Blann D. Bradley G. Williams 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(11):e522-e523
The crystal structure of the title compound, C20H18O4, contains a crystallographic inversion center. The C—C bond linking the two halves of the molecule is slightly elongated at 1.577 (3) Å. 相似文献
4.
Anwar Usman Ibrahim Abdul Razak Hoong‐Kun Fun Suchada Chantrapromma Bao‐Guo Zhao Jian‐Hua Xu 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):o24-o25
In the title compound, C20H16N2O5, both of the 1‐acetylisatin (1‐acetyl‐1H‐indole‐2,3‐dione) moieties are planar and form a dihedral angle of 74.1 (1)°. Weak intermolecular hydrogen bonds and C—H?π interactions stabilize the packing in the crystal. 相似文献
5.
Nada Kouti‐Hulita Aleksandar Danilovski Miroslav Maleevi Marina Orei Miljenko Dumi 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(9):1144-1145
The 2,8‐dihydroxy‐1,3,7,9‐tetramethyl‐6,12‐dihydrodipyrido[1,2‐a:1′,2′‐d]pyrazinediylium dication possesses 2/m symmetry and lies in the mirror plane together with a chloride anion and the water O atom. The dication also lies on an inversion centre, i.e. C16H20N2O22+·2Cl?·2H2O. Due to these symmetry constrictions the dication adopts an unexpected planar conformation. Molecules are linked by O—H?O and O—H?Cl hydrogen bonds to form chains, which are cross‐connected by C—H?Cl attractive interactions forming a complex three‐dimensional hydrogen‐bond network. 相似文献
6.
Cengiz Arici Filiz Ercan Raif Kurtaran Orhan Atakol 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(7):812-814
In the title compounds, {2,2′‐[2,2‐dimethyl‐1,3‐propanediylbis(nitrilomethylidyne)]diphenolato‐κ4N,N′,O,O′}nickel(II), [Ni(C19H20N2O2)], and {2,2′‐[2,2‐dimethyl‐1,3‐propanediylbis(nitrilomethylidyne)]diphenolato‐κ4N,N′,O,O′}copper(II), [Cu(C19H20N2O2)], the NiII and CuII atoms are coordinated by two iminic N and two phenolic O atoms of the N,N′‐bis(salicylidene)‐2,2‐dimethyl‐1,3‐propanediaminate (SALPD2?, C17H16N2O22?) ligand. The geometry of the coordination sphere is planar in the case of the NiII complex and distorted towards tetrahedral for the CuII complex. Both complexes have a cis configuration imposed by the chelate ligand. The dihedral angles between the N/Ni/O and N/Cu/O coordination planes are 17.20 (6) and 35.13 (7)°, respectively. 相似文献
7.
Bjorn Olesen Marcus R. Bond 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(3):o196-o197
The analysis of the title compound, C10H15NO4, firmly establishes the configuration of the double bond as E, a stereochemistry that had been assigned tentatively by other methods. The diacetylamine and acetate substituents are approximately coplanar to one another, but approximately perpendicular to the planar ethene core. H atoms of the ethene methyl substituents are found within the ethene plane, indicating that hyperconjugation does not play an important role in stabilizing the double bond. 相似文献
8.
Zhi‐Yong Wu Yan‐Tuan Li Duan‐Jun Xu 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(11):m463-m465
The title compound, [VO(SO4)(C6H6N4S2)(H2O)2]·4H2O, displays a distorted octahedral coordination geometry. The 2,2′‐diamino‐4,4′‐bithiazole ligand is present in the usual chelating bidentate mode. The sulfate ligand coordinates in a monodentate fashion to the V atom. A large displacement of the V atom from the equatorial plane towards the oxo group correlates with the strong V=O double bond. In the crystal structure, a three‐dimensional supramolecular network is formed by hydrogen bonds. 相似文献
9.
Susim Maiti Monika Mukherjee Bidisha Nandi Madeleine Helliwell Nitya G. Kundu 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(8):992-994
The title compound, C26H21NO2S2, which consists of a benzothiazole skeleton with α‐naphthylvinyl and tosyl groups at positions 2 and 3, respectively, was prepared by palladium–copper‐catalyzed heteroannulation. The E configuration of the molecule about the vinyl C=C bond is established by the benzothiazole–naphthyl C—C—C—C torsion angle of 177.5 (4)°. The five‐membered heterocyclic ring adopts an envelope conformation with the Csp3 atom 0.380 (6) Å from the C2NS plane. The two S—C [1.751 (4) and 1.838 (4) Å] and two N—C [1.426 (5) and 1.482 (5) Å] bond lengths in the thiazole ring differ significantly. 相似文献
10.
Wen‐Tao Huang Jem‐Mau Lo Hsueh‐Hua Yao Fen‐Ling Liao 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(5):e172-e173
The title compound, [Re2O3(C19H20N2O2)2], is a hexacoordinate complex containing an [Re2O3]4+ core with a linear O=Re—O—Re=O bridge. The distorted octahedral coordination of the ReV atom is achieved by an N2O2 donor set from the tetradentate imine–phenol ligand. The overall charge of the compound is neutral due to deprotonation of the phenol groups, and the terminating and bridging O atoms. The Re=O and Re—O bond distances of the [Re2O3]4+ core are 1.699 (4) and 1.911 (1) Å, respectively. The Re—O and Re—N bond distances of the equatorial plane are in the ranges 2.024 (4)–2.013 (4) and 2.128 (5)–2.120 (5) Å, respectively. 相似文献
11.
Simon J. Coles David Douheret Michael B. Hursthouse Jeremy D. Kilburn 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):687-688
The title compound, C11H8N4S, is found to have a symmetrical resonance structure in which both pyridyl‐N atoms interact with the S atom forming hemi‐bonds. This also results in the formation of a delocalized diimine region and disturbance of the aromaticity in the pyridyl rings. 相似文献
12.
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
13.
Johan Wouters Bernadette Norberg Salvatore Guccione 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(2):o69-o71
The crystal structures of 4‐methyl‐2‐[N‐(3,4‐methylenedioxybenzylidene)hydrazino]thiazole, C12H11N3O2S, and its reduction product 4‐methyl‐2‐[N‐(3,4‐methylenedioxybenzylidene)hydrazono]‐4,5‐dihydrothiazole, C12H13N3O2S, have been determined and compared. In the reduction product, the tautomer observed bears an H atom on the exocyclic N atom. Both compounds form hydrogen‐bonded dimers over centers of inversion. 相似文献
14.
Amitabh Jha Sanjay Malhotra Virinder S. Parmar William Errington 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):899-900
The title compound, 2,2‐dimethylchroman‐6‐ol, C11H14O2, has been identified as a side product from the condensation of hydroquinone with 2‐methylbut‐3‐en‐2‐ol. The pyran ring has a half‐chair conformation. The hydroxyl groups are involved in intermolecular hydrogen bonding which generates infinite spiral chains around the fourfold screw axes; the O?O hydrogen‐bonded distances are 2.661 (1) Å. 相似文献
15.
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
16.
Sheng‐Run Zheng Yue‐Peng Cai Xue‐Li Zhang Cheng‐Yong Su 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(11):o642-o644
The title compound, C16H16N5+·Cl− (nbbH+·Cl−), displays N—H⋯N, N—H⋯Cl and π–π interactions in the crystal packing. The Cl− anion is chelated by the nbbH+ cation via two N—H⋯Cl hydrogen bonds. Inter‐ion N—H⋯N and N—H⋯Cl hydrogen bonds link ions related by 21 screw axes into chains along the c axis. These chains are further linked by glide‐plane operations to generate a three‐dimensional network, which is additionally stabilized by interchain π–π interactions. 相似文献
17.
Alexander Filippou Peter Portius Athanassios Philippopoulos Gabriele Kociok‐Khn Burkhard Ziemer 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(9):e378-e379
trans‐[MoCl2(dppe)2] [dppe is 1,2‐ethanediylbis(diphenylphosphine), C26H24P2] was obtained as a side product from the reaction of trans‐[Mo(dppe)2(N2)2] with Cp*GeCl to give the germylyne complex trans‐[Cl(dppe)2Mo[triple‐bond]Ge(η1‐Cp*)]. The crystal structures of the hemipentane (0.5C5H12) and ditetrahydrofuran (2C4H8O) solvates of trans‐[MoCl2(dppe)2], (IIIa) and (IIIb), respectively, have been determined. 相似文献
18.
Mark E. Light Michael B. Hursthouse 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(10):e483-e483
The relative configuration was determined for the title compound, C16H28O7, which was obtained as a mixture of epimers. There are both intra‐ and intermolecular hydrogen bonds, the latter forming dimers around the crystallographic centres of inversion. 相似文献
19.
Abdurrahman engül Nevzat Karaday Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(7):o507-o508
Molecules of the title compound, C12H12N6, contain both a diimine linkage and an N—N bond, and assume a planar structure. The compound lies about an inversion centre and there are three intramolecular C—H⋯N hydrogen bonds. 相似文献
20.
Youxin Yao Wenju Zeng Bin Zhang Yunqi Liu Daoben Zhu 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(3):e90-e91
The title complex, C14H20O4S8+.BF4?, is a charge‐transfer complex with typical charges for the donor and anion of +1 and ?1, respectively. Two centrosymmetrically related donors form a face‐to‐face π‐dimer with a strong intermolecular S?S interaction. These π‐dimers stack along the a axis to form a donor column. The structure is extensively hydrogen bonded. 相似文献