共查询到20条相似文献,搜索用时 15 毫秒
1.
Rong Cao Mutai Bao Jiabao Weng Weiping Su Maochun Hong 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(5):e185-e186
The title centrosymmetric CuII binuclear complex, bis(μ‐N,N‐diethyl‐1,1‐diselenocarbamato‐Se,Se′:Se)bis[(N,N‐diethyl‐1,1‐diselenocarbamato‐Se,Se′)copper(II)], [Cu(Se2CNEt2)2]2 or [Cu2(C5H10NSe2)4], is built from two symmetry‐related [Cu{Se2CN(Et)2}2] units by pairs of Cu—Se bonds. The coordination geometry at the unique Cu atom is distorted square pyramidal, with Cu—Se distances in the range 2.4091 (11)—2.9095 (10) Å. 相似文献
2.
Jun Ni Yi‐Zhi Li Wen‐Bin Qi Yong‐Jiang Liu Hui‐Lan Chen Zhi‐Lin Wang 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):o470-o472
The title compound, 3,3′‐(4‐pyridylimino)dipropanenitrile, C11H12N4, has a twofold axis and consists of a pyridine ring head and two cyanoethyl tails, the three groups being linked by an N atom. The planar geometry around the amino N atom suggests conjugation with the π‐system of the pyridine ring. The molecules are stacked in a layer structure via relatively weak to very weak intermolecular C—H⃛π and C—H⃛N hydrogen‐bond interactions. 相似文献
3.
Alexander V. Virovets Irina V. Kalinina Vladimir P. Fedin Dieter Fenske 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):e589-e590
During an investigation of the W/Te/Br2 system, we prepared crystals of the title compound, C20H40N4S8Te, from acetonitrile solution by slow addition of diethyl ether. It appeared to be a new tetragonal modification. The calculated density of the tetragonal modification (1.513 Mg m?3) is slightly greater than found for the known orthorhombic modification (1.46 Mg m?3). The bond distances and angles are practically the same. 相似文献
4.
Seik Weng Ng A. Aziz Yang Farina Abdul Hamid Othman Ibrahim Baba K. Sivakumar Hoong‐Kun Fun 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(3):e84-e85
The title compound, [Sn(CH3)2(C5H10NO2S2)2], has crystallographic mirror symmetry (C—Sn—C on mirror plane) and the coordination polyhedron around the Sn atom is a tetrahedron [C—Sn—C 139.3 (2)° and S—Sn—S 82.3 (1)°] distorted towards a skew‐trapezoidal bipyramid owing to an intramolecular Sn?S contact [3.0427 (6) Å]. The molecules are linked into a linear chain by intermolecular O—H?O hydrogen bonds [O?O 2.646 (3) Å]. 相似文献
5.
Ayhan Elmali C. Tugrul Zeyrek YalcÛn Elerman Ingrid Svoboda 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(11):1302-1304
The title compounds, {4,4′‐dibromo‐2,2′‐[1,3‐propanediylbis(nitrilomethylidyne‐N)]diphenolato‐O,O′}nickel(II), [Ni(C17H14Br2N2O2)], and {4,4′‐dichloro‐2,2′‐[1,3‐propanediylbis(nitrilomethylidyne‐N)]diphenolato‐O,O′}copper(II), [Cu(C17H14Cl2N2O2)], lie on crystallographic twofold axes. In both structures, the metal coordination sphere is a tetrahedrally distorted square plane formed by the four‐coordinate N2O2 donor set of the Schiff base imine–phenol ligands. In the Ni compound, the Ni—O and Ni—N distances are 1.908 (3) and 1.959 (4) Å, respectively, while in the Cu compound, the Cu—O and Cu—N distances are 1.907 (2) and 1.960 (2) Å, respectively. The two Schiff base moieties, which themselves are nearly planar, are inclined at an angle of 29.26 (7)° for the Ni compound and 29.26 (5)° for the Cu compound. 相似文献
6.
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
7.
James Chapman Nigel L. Pickett Gabriel Kolawole Majid Motevalli Paul O'Brien 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(11):e501-e502
The title copper complex, [Cu(dl ‐DAP)2(H2O)2]·2H2O or [Cu(C3H7N2O2)2(H2O)2]·2H2O, prepared from the non‐protein amino acid dl ‐2,3‐diaminopropionic acid (dl ‐HDAP), has a center of symmetry and a distorted octahedral coordination, with four N atoms in equatorial positions and two water molecules in apical sites. The water molecule of crystallization is hydrogen bonded to the deprotonated carboxylate group of the ligand. 相似文献
8.
Jos Mahía Miguel A. Maestro Miguel Vzquez Manuel R. Bermejo Ana M. Gonzlez Marcelino Maneiro 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):492-493
The conformation of the title compound, C34H30N4O4S2, is strongly influenced by intramolecular N—H?N hydrogen‐bond interactions and by the rigidity endowed by the presence of a phenyl group between the imine N atoms. The molecule is not planar, with very short distances between the imine N atoms [N?N 2.753 (3) Å] and the amine N atoms [N?N 5.148 (4) Å]. Consequently, important changes in its conformation will be required if it is to act as a tetradentate ligand via its four N atoms. 相似文献
9.
Li‐Ping Lu Pin Yang Shi‐Dong Qin Miao‐Li Zhu 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(5):m219-m220
The crystal structure of the title compound, [Cu(C4H10N5)2]·H2O, contains two independent copper N,N‐dimethylbiguanide complex units, each with square‐planar coordination of the Cu atom by four N atoms. The two complexes have different symmetry, with one Cu atom lying on an inversion centre and the other on a twofold rotation axis. The Cu—N bond lengths are 1.923 (2) and 1.950 (2) Å in the centrosymmetric complex, and 1.928 (2) and 1.938 (2) Å in the non‐centrosymmetric complex. The crystal structure is stabilized by N—H⋯O, O—H⋯N and N—H⋯N hydrogen bonds; each water molecule forms four hydrogen bonds involving three different Cu complexes. 相似文献
10.
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
11.
Jos Luis Alcntara‐Flores Sylvain Berns Yasmi Reyes‐Ortega Rafael Zamorano‐Ulloa 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(3):m79-m81
The title compound, [ZnBr2(C15H26N2)], when synthesized starting from Zn0, is obtained in two polymorphic forms, one belonging to space group P212121 and one to P1. The present contribution deals with the triclinic phase, which is isostructural with the orthorhombic form but presents a larger metal–metal intermolecular separation; the Zn⃛Zn distance is 7.4715 (6) Å for the triclinic polymorph as opposed to 6.534 Å for the orthorhombic polymorph. 相似文献
12.
Lin‐Hai Jing Da‐Bin Qin Shao‐Jin Gu Huan‐Xia Zhang Gang Lei 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(9):o561-o562
The title compound, C26H22N2O4, crystallizes in an anti‐C=O orientation, with the two N‐substituted benzene rings in different conformations relative to the naphthalene ring. These conformations allow two strong N—H⋯O hydrogen bonds and one C—H⋯π interaction to generate molecular chains in the cell. 相似文献
13.
Aarne Pajunen Fernando Cmara Jose M. Dominques‐Vera Enrique Colacio 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):e49-e50
In the title compound, [Cu(C10H18N5)(CH4O)]ClO4, four N atoms from the deprotonated ligand derived from bis(3‐aminopropyl)amine and 2‐imidazolecarboxaldehyde are coordinated to the Cu atom. The four N atoms occupy equatorial positions with Cu—N bond distances ranging from 1.998 (2) to 2.046 (3) Å. The methanol O atom occupies one axial position with a Cu—O bond distance of 2.295 (2) Å. 相似文献
14.
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
15.
Yoshiyuki Kani Shigeru Ohba Mami Kunita Yuzo Nishida 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(5):e198-e198
The title mononuclear copper(II) complex, [CuCl(C18H26N4)]ClO4, shows a square‐pyramidal coordination with the diethylamino N atom at the apical position. Large anisotropies in the displacement parameters of the non‐H atoms of the ligand seem to be due to rotational disorder of the ClO4? anion. 相似文献
16.
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
17.
Varughese Philip E. Manoj M. R. Prathapachandra Kurup Munirathinam Nethaji 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(11):m488-m490
The VV atom in the title complex, [V(C16H16N5S)O2], is five‐coordinate in a highly distorted square‐pyramidal geometry, with the pyridyl N, the azomethine N and the thiolate S atoms of the di‐2‐pyridyl ketone N4,N4‐(butane‐1,4‐diyl)thiosemicarbazone ligand and one oxo ligand occupying the basal coordination positions, while the second oxo ligand occupies the apical position. The molecules are interconnected by weak intermolecular interactions, mainly of the C—H⋯O type, involving the oxo atoms. 相似文献
18.
Brendan F. Abrahams Bernard F. Hoskins Timothy A. Hudson Richard Robson 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):e126-e127
Reaction of pyridoin with nickel nitrate in methanol in air gives crystals of two forms of the title compound, [Ni(C12H9N2O3)2]; a triclinic form with the Ni atom on an inversion centre and a monoclinic form with one molecule in a general position in the asymmetric unit. Both forms show an octahedral nickel centre coordinated by two facial tridentate ligands with their O‐atom donors trans. 相似文献
19.
Yan‐Ping Li Pin Yang Zi‐Xiang Huang Fu‐Xin Xie 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(1):m7-m9
The title compound, [Cu2(C6H12N4O2)(ClO4)2(C11H6N2O)2]·2C11H6N2O, contains a dinuclear copper(II) complex which lies about a twofold axis at the mid‐point of the C—C bond of the oxamide ligand that bridges the two CuII atoms. The Cu·Cu distance is 5.215 (2) Å and the Cu atoms have distorted octahedral coordination geometry. Intramolecular N—H·O and N—H·N hydrogen bonds and intermolecular C—H·O hydrogen bonds, together with π–π stacking interactions, dominate throughout the crystal structure. 相似文献
20.
Fangfang Jian Fengli Bei Lude Lu Xujie Yang Xin Wang Ibrahim Abdul Razak S. Shanmuga Sundara Raj Hoong‐Kun Fun 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):e288-e289
In the title compound, [Cu(C5H10NO2S2)(C18H15P)2]·C18H15P, the Cu atom is in a distorted tetrahedral coordination, with two triphenylphosphine P atoms and two S atoms from an N,N‐bis(2‐hydroxyethyl)dithiocarbamate ligand occupying the vertices. The crystal structure is characterized by alternate layers of complex and triphenylphosphine molecules. 相似文献