共查询到20条相似文献,搜索用时 15 毫秒
1.
Shigeru Ohba Makoto Eishima Hiroshi Seki 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):e555-e556
In the title compound, [Co(tpp)(NO2)(H2O)]·2dmf or [Co(C44H28N4)(NO2)(H2O)]·2C3H7NO, a distorted octahedral CoIII complex shows an orientational disorder such that the positions of the nitro and aqua ligands are exchanged. As a result, the averaged structure has an inversion centre at the Co atom. The dimethylformamide molecule also has a positional disorder. 相似文献
2.
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
3.
Ming‐Liang Tong Shao‐Liang Zheng Xiao‐Ming Chen 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(8):960-962
The title compound, poly[[diaquadibromocadmium‐μ‐(1,3,5,7‐tetraazatricyclo[3.3.1.13,7]decane‐N1:N5)‐aquacadmium‐di‐μ‐bromo‐aquacadmium‐μ‐(1,3,5,7‐tetraazatricyclo[3.3.1.13,7]decane‐N1:N5)‐di‐μ‐bromo] dihydrate], [Cd3Br6(C6H12N4)2(H2O)4]·2H2O, is made up of two‐dimensional neutral rectangular coordination layers. Each rectangular subunit is enclosed by a pair of Cd3(μ2‐Br)6(H2O)3 fragments and a pair of (μ2‐hmt)Cd(H2O)2Br2(μ2‐hmt) fragments as sides (hmt is hexamethylenetetramine). The unique CdII atom in the Cd2Br2 ring in the Cd3(μ2‐Br)6(H2O)3 fragment is in a slightly distorted octahedral CdNOBr4 geometry, surrounded by one hmt ligand [2.433 (5) Å], one aqua ligand [2.273 (4) Å] and four Br atoms [2.6409 (11)–3.0270 (14) Å]. The CdII atom in the (μ2‐hmt)Cd(H2O)2Br2(μ2‐hmt) fragment lies on an inversion center and is in a highly distorted octahedral CdN2O2Br2 geometry, surrounded by two trans‐related N atoms of two hmt ligands [2.479 (5) Å], two trans‐related aqua ligands [2.294 (4) Å] and two trans‐related Br atoms [2.6755 (12) Å]. Adjacent two‐dimensional coordination sheets are connected into a three‐dimensional network by hydrogen bonds involving lattice water molecules, and the aqua, bromo and hmt ligands belonging to different layers. 相似文献
4.
Uwe‐Christoph Knig Michael Berkei Claudia Hirsch Hans Preut Terence Nigel Mitchell 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(10):e450-e451
The synthesis and the X‐ray structural analysis of the title compound, μ‐chloro‐1:2κ2Cl‐trichloro‐1κCl,2κ2Cl‐tetramethyl‐1κ2C,2κ2C‐(N‐methylpyrrolidin‐2‐one)‐1κO‐ditin(IV), [Sn2Cl4(CH3)4(C5H9NO)], are described. The title compound is found to exhibit a distorted trigonal–bipyramidal geometry at both SnIV atoms. The Sn—Cl—Sn angle involving the bridging chlorine ligand is 135.56 (5)°, with the Sn—Cl bond lengths being 2.5704 (13) and 3.1159 (13) Å. 相似文献
5.
Hiroyuki Hosomi Shigeru Ohba Yoshikatsu Ito 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):e149-e150
In the three title crystal structures 4‐(dimethylamino)pyridinium 2,4‐dinitrobenzoate, (I), 4‐(dimethylamino)pyridinium 3,4‐dinitrobenzoate, (II), and 4‐(dimethylamino)pyridinium 3,5‐dinitrobenzoate, (III), all C7H11N2+·C7H3N2O6?, the ions are connected by an N—H?O hydrogen bond. Dihedral angles between the pyridine and phenyl rings are 69.9 (1), 26.7 (1) and 56.2 (1)° in (I), (II) and (III), respectively. Donor–acceptor π–π stacking is observed in (II) and (III), but not in (I). 相似文献
6.
Roger D. Willett Brendan Twamley 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(6):706-708
The title compound, (C10H11N2)2[CuBr3], contains layers of planar monoprotonated cations. Isolated trigonal–planar [CuBr3]2? anions are hydrogen bonded to cations in adjacent layers, providing three‐dimensional stability to the crystal structure. 相似文献
7.
Lidia Armelao Giovanni Depaoli Alessandro Dolmella 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):e268-e268
In the crystal of the title compound, C10H12O2, there are two symmetry‐independent molecules, which are essentially superimposable. Each molecule exhibits an intramolecular O—H?O hydrogen bond, with O?O separations of 2.483 (4) and 2.468 (4) Å. 相似文献
8.
M. Teresa Duarte A. Ferreira A. R. Dias M. M. Salema Joo Ferreira da Silva 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(2):m104-m106
The structure of the title compound, [Ti(C2H6N)2(C6H8N)Cl], displays a η5‐coordination mode for the pyrrolyl ring, confirmed by the values of the slip parameter [0.073 (9) Å] and the fold angle [4.6 (6)°]. This coordination is confirmed by NMR data, which point to the involvement of the complex in a fluxional process in solution above 285 K, passing through an intermediate involving simultaneously a metal–azaallyl and a metal–olefin bond. 相似文献
9.
David J. Wiedenfeld Vladimir N. Nesterov Mark A. Minton Crystal L. Montoya 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(7):o536-o538
The title compounds, 1‐chloro‐3,6‐dimethoxy‐2,5‐dimethylbenzene, (IIIa), and 1‐chloro‐3,6‐dimethoxy‐2,4‐dimethylbenzene, (IIIb), both C10H13ClO2, were obtained from 2,5‐ and 2,6‐dimethyl‐1,4‐benzoquinone, respectively, and are intermediates in the synthesis of ammonium quinone derivatives. The isomers have different substituents around the methoxy groups and crystallize in different space groups. In both molecules, the methoxy groups each have different orientations with respect to the benzene ring. In both cases, one methoxy group lies in the plane of the ring and can participate in conjugation with the aromatic system, while the second is almost perpendicular to the plane of the aromatic ring. The C—O—C bond angles around these substituents are also different: 117.5 (4) and 118.2 (3)° in (IIIa) and (IIIb), respectively, when the methoxy groups lie in the plane of the ring, and 114.7 (3) and 113.6 (3)° in (IIIa) and (IIIb), respectively, when they are out of the plane of the ring. 相似文献
10.
Ahmed A. Mohamed John P. Fackler 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(4):m228-m229
The two independent bis(3,5‐dimethylpyrazole)silver(I) cations in crystalline [Ag(C5H7N2)2]NO3 display N—Ag—N angles of 175.51 (14) and 174.44 (13)°, and an average Ag—N distance of 2.124 (5) Å. The nitrate anion is situated between [Ag(C5H7N2)2]+ units and interacts via hydrogen bonds with the NH groups. The two 3,5‐dimethylpyrazole ligands are trans about the silver center. Only a small deviation from linearity is observed in the coordination around silver. 相似文献
11.
Dale C. Swenson Zhaoyu Guo Donna J. Crowther Norman C. Baenziger Richard F. Jordan 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(8):e313-e314
The title compound, [Hf(C7H7)3(C10H15)], adopts a monomeric three‐legged piano‐stool structure. One benzyl ligand is disordered between two sites (44:56%) related by a ~30° rotation about an axis defined by the Hf atom and the ipso‐C atom of the benzyl ligand. 相似文献
12.
Kum Sang Low Suresh Muniandy Pance Naumov S. Shanmuga Sundara Raj Hoong‐Kun Fun Ibrahim Abdul Razak Seik Weng Ng 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(3):e113-e114
Bis(N,N‐dimethylthiocarbamoylthio)acetic acid, [(CH3)2NC(=S)S]2CHC(=O)OH or C8H14N2O2S4, exists as a centrosymmetric hydrogen‐bonded dimer [O?O 2.661 (3) Å]. 相似文献
13.
Kai Liang Yi‐Zhi Li He‐Gen Zheng Xin‐Quan Xin 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):m310-m312
In the title compound, [1,4‐bis(diphenylphosphino)butane‐2κ2P,P′]di‐μ‐thio‐1:2κ4S‐dithio‐1κ2S‐palladium(II)tungsten(VI) N,N′‐dimethylformamide hemisolvate hemihydrate, [PdWS4(C28H28P2)]·0.5C3H7NO·0.5H2O, the Pd atom is coordinated by two S atoms from the distorted‐tetrahedral [WS4]2− anion and two P atoms from the dppb molecule [dppb is 1,4‐bis(diphenylphosphino)butane] in an approximately square‐planar configuration. A puckered seven‐membered ring is formed by the Pd atom and the dppb ligand. 相似文献
14.
Giuseppe Bruno Manuela Panzalorto Francesco Nicol Carmela Grazia Arena Paola Cardiano 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(10):e429-e429
The title ruthenium complex, [RuCl2(C10H14)(C16H19P)], contains a monodentate (C4H9)PPh2 ligand coordinated by the P atom. Coordination about the metal centre is completed by a η6‐p‐cymene ligand and two Cl atoms. 相似文献
15.
Kishie Noguchi Hidetaka Yuge Takeshi Ken Miyamoto 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):e40-e41
In the title compound, [Pd(C6H7N2O3)2(C2H8N2)]·5.5H2O, the Pd atom is coordinated by two 1,3‐dimethylbarbiturate anions through a deprotonated tetrahedral carbon and the enolate oxygen. The Pd—N bond length of 2.078 (2) Åtrans to the C atom is shorter than the Pt—N distance of 2.098 (3) Å in the Pt analog. 相似文献
16.
Uwe‐Christoph Knig Michael Berkei Claudia Hirsch Hans Preut Terence Nigel Mitchell 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):e550-e551
The preparation and X‐ray analysis of the title compound, [Sn2Br4(CH3)4(C5H9NO)], are described. The compound contains two Sn atoms in the asymmetric unit, that complexed by N‐methylpyrrolidin‐2‐one being hexacoordinated (a), the other exhibiting pentacoordination (b). The most important features are three different Sn—Br bond lengths at both Sn atoms with the following values: (a) 2.5060 (9), 2.7152 (10) and 3.7118 (10) Å; (b) 2.5084 (10), 2.5279 (9) and 3.5841 (10) Å. 相似文献
17.
Xue‐Jie Tan Si‐Xiu Sun Jian‐Ping Ma Lian‐Dong Liu Yu‐Bin Dong Wen‐Tao Yu Dian‐Xiang Xing 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(10):m476-m478
In the title compound, (C7H10N)[Ca(C3H7NO)6][PMo12O40], two types of cations {viz. 1,4‐dimethylpyridinium and a [Ca(DMF)6]2+ complex cation (DMF is dimethylformamide)} and dodecamolybdophosphate (tetracontaoxophosphidododecamolybdate) anions form an infinite three‐dimensional assembly via electrostatic forces. 相似文献
18.
Yoriko Sonoda Yuji Kawanishi Midori Goto 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(6):o311-o313
The title molecule, C18H12Cl4, lies about an inversion centre and the hexatriene chain is planar. The torsion angle of the single bond between the planes of the chain and the benzene ring is −8.6 (3)°. The dihedral angle between the planes defined by the chains of adjacent molecules is 50.0 (2)°. The shortest intermolecular distance between the Cl atoms is 3.514 (1) Å. The molecules are joined through π–π‐stacking and strong attractive Cl⃛Cl interactions. 相似文献
19.
T. V. Sundar V. Parthasarathi K. Sarkunam M. Nallu B. Walfort H. Lang 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(7):o464-o466
The title compounds, C15H16ClN2O+·Br−·1.5H2O and C15H16BrN2O+·Br−·1.5H2O, are isomorphous. The benzene ring is oriented nearly normal to the pyridine ring in both compounds. The molecular packing is mainly influenced by intermolecular O—H⋯O and O—H⋯Br interactions, as well as weak intramolecular C—H⋯O interactions. The H2OBr− units form an extended water–bromide chain, with a bridging water molecule on a twofold axis. 相似文献
20.
Paul C. Bell Marie Drameh Nicola Hanly John D. Wallis 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):670-671
The interaction between the peri substituents in the title compound, C18H18N2O2, measured at 150 K, represents an early stage in the addition reaction of an amino group to an electron‐deficient alkene, and has an N?Csp2 separation of 2.531 (2) Å; comparison with related structures indicates that the nitrile group activates an alkene to nucleophilic attack more than a coplanar carboxylic ester group. 相似文献