共查询到20条相似文献,搜索用时 421 毫秒
1.
Diego Venegas‐Yazigi Hameed Mirza A. B. P. Lever Alan J. Lough Juan Costamagna Andrs Vega Ramn Latorre 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(6):e245-e246
The Ru atom in the title compound, [RuCl2{P(C6H5)3}2{C6H4(NH)2}]·1.33CH3OH·0.33CH2Cl2, shows a six‐coordinate octahedral geometry, with a trans arrangement of the triphenylphosphine groups. One and a half molecules of complex, two molecules of methanol and a half molecule of dichloromethane form the asymmetric unit, with crystallographic twofold rotation symmetry for the complex molecule in a special position. 相似文献
2.
Bernardo Masci Martine Nierlich Pierre Thury 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(2):o86-o87
2,3,6,7‐Tetrahydroxy‐9,10‐dimethyl‐9,10‐dihydro‐9,10‐ethanoanthracene crystallizes with 1,4‐dioxane to give a bis‐solvate, C18H18O4·2C4H8O2. The bis(catechol) molecule is located on a twofold axis and the two aromatic rings form a dihedral angle of 130.61 (4)°. Hydrogen bonds are formed between the hydroxyl groups and either a neighbouring bis(catechol) molecule or the ether‐O atom of a dioxane molecule. 相似文献
3.
Yi‐Zhi Li Wei‐Wei Liu Yan‐Jie Li Guo‐Jun Pan Hong‐Wen Hu 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(11):o611-o612
An N,N′‐disubstituted dithiooxamide derivative reacts with 1,2‐dibromoethane to produce the title compound, C18H18N2S2, a heterocycle with a double Schiff base. In the crystal structure, the molecule of the title compound lies on a twofold axis. Weak C—H⋯π interactions are the principal intermolecular forces, mediating the formation of layers parallel to the ab plane. Each molecule participates as donor and acceptor in two such contacts. 相似文献
4.
Günter Reck Ingo Orgzall Burkhard Schulz Birgit Dietzel 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(11):o634-o635
The title compound [systematic name: dimethyl 4,4′‐(1,3,4‐oxadiazole‐2,5‐diyl)diphenylenedicarboxylate], C18H14N2O5, crystallizes under similar conditions in two different orthorhombic crystalline forms. In both forms, the molecule consists of two equivalent parts. In form 1, these parts are related by a twofold axis of space group Pbcn, and in form 2, by a mirror plane of space group Cmc21. The O atom of the oxadiazole ring occupies a special position on the twofold axis and on the mirror plane in forms 1 and 2, respectively. 相似文献
5.
Yanko Moreno Patricio Hermosilla María Teresa Garland Octavio Pea Ricardo Baggio 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(9):m404-m406
In the title monomer, [Cu(NO3)2(C24H16N2)2], the copper(II) cation is eight‐coordinate within an octahedral‐like polyhedron. The coordination polyhedron is formed by two chelating diphenylphenanthroline groups that define the highly distorted CuN4 equatorial plane and two weakly bound bidentate (chelating) nitrate groups in the apical or axial positions. The complex crystallizes in the monoclinic space group C2/c; a twofold axis passes through the copper(II) cation and bisects the two nitrate ligands. This gives the molecule C2 point‐group symmetry, rendering only half of the molecule independent. 相似文献
6.
Jem‐Mau Lo Golam Mostafa Ling‐Yin Chang Fen‐Ling Liao Tian‐Huey Lu 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(4):o276-o277
The title compound, C10H18N2S2, acts as an important precursor for the synthesis of the pharmaceutically important diaminedithiol ligand system. The molecule has a local twofold axis and the arrangement of the S2N2 donor atoms in the macrocycle is anticlinal. 相似文献
7.
Eleonora Freire Sergio Baggio Juan Carlos Muoz Ricardo Baggio 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):m299-m301
The structure of the title compound, [Ni(ths)(bbip)(dmf)]·H2O [ths is thiosulfate, S2O3; bbip is 2,6‐bis(1H‐benzimidazol‐2‐yl)pyridine, C21H13N5; and dmf is dimethylformamide, C3H7NO], is monomeric, with the nickel ion octahedrally surrounded by an N,N′,N′′‐tridentate bbip molecule, an S,O‐bidentate ths molecule and an O‐monodentate dmf molecule. The H atoms of the hydration water molecule and the amino groups of bbip are involved in hydrogen bonding and determine a spatial organization of broad layers parallel to (001), which are connected by weak interactions. 相似文献
8.
Chong‐Hyeak Kim Sueg‐Geun Lee 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(7):m421-m423
The title compound, [Ni(C3H10N2)2(H2O)2](C6H6NO3S)2, contains alternating layers of sulfanilate anions and diaquabis(1,3‐propanediamine)nickel(II) cations. The Ni atom lies on an inversion centre and is hexacoordinated by the 1,3‐propanediamine ligands, which function as N,N′‐bidentate ligands, and the water molecules, which are in a trans arrangement. The sulfanilate anions are arranged in layers, with the sulfonate and amine groups directed towards opposite sides of the layer. The structure is stabilized by a network of hydrogen bonding between the O and N atoms of the sulfanilate anions, the water molecules, and the N atoms of the 1,3‐propanediamine ligands. 相似文献
9.
Malcolm A. Halcrow Colin A. Kilner Mark Thornton‐Pett 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(2):213-214
The title compound, C13H7F6N5, is one of a series of hindered tris‐imine ligands for meridonial coordination to transition metals. The molecule has crystallographic C2 symmetry, the pyrazole and pyridine rings adopting a near‐coplanar transoid conformation. 相似文献
10.
Mrcia R. Siqueira Liange de Oliveira Diehl Robert A. Burrow 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(2):m67-m69
In the centrosymmetric title compound, [Co2(C12H10O2P)4(C5H5N)4(H2O)2], each approximately octahedral Co atom features two trans‐coordinated pyridine molecules, one water molecule, a terminally coordinated monodentate diphenylphosphinate ligand, and two bidentate diphenylphosphinate ligands that bridge the two Co atoms across a centre of inversion to form a dimeric binuclear complex. The discrete molecules are linked by double hydrogen bonds between the terminally coordinated diphenylphosphinate ligand and the water molecule to form a continuous chain along the crystallographic b axis. 相似文献
11.
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
12.
Andrei S. Batsanov Judith A. K. Howard David O'Hagan Mustafa Tavasli 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):e567-e568
The title molecule, C12H14OS2, has approximate Cs symmetry. The dithiane ring adopts a chair conformation with the acetyl substituent in an axial orientation. Weak intermolecular C—H?O hydrogen bonds link molecules into a chain along the y axis. 相似文献
13.
John Nicolson Low Justo Cobo Manuel Nogueras Adolfo Snchez Braulio Insuasty Harlen Torres 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):o39-o41
2,2‐Dimethyl‐5‐[3‐(4‐methylphenyl)‐2‐propenylidene]‐1,3‐dioxane‐4,6‐dione, C16H16O4, crystallizes in the triclinic space group , with two molecules in the asymmetric unit. These molecules and a centrosymmetrically related pair, linked together by weak C—H?O hydrogen bonds, form a tetramer. 5‐[3‐(4‐Chlorophenyl)‐2‐propenylidene]‐2,2‐dimethyl‐1,3‐dioxane‐4,6‐dione, C15H13ClO4, also crystallizes in the triclinic space group , with one molecule in the asymmetric unit. Centrosymmetrically related molecules are linked together by weak C—H?O hydrogen bonds to form dimers which are further linked by yet another pair of centrosymmetrically related C—H?O hydrogen bonds to form a tube which runs parallel to the a axis. 相似文献
14.
Gerardo Medina Laura Gasque Sylvain Berns 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):766-768
The title compound, [Cu(C2H3O3)(C14H12N2)(H2O)]NO3, is the first example of a mixed copper glycolate compound with a diimine ligand. The copper(II) compound lies in a slightly distorted square‐pyramidal coordination environment with one water molecule coordinated in the apical position. The glycolate ligand binds to the Cu atom as a chelate through a carboxylate and the α‐OH O atom which, together with the N atoms of the substituted phenanthroline, constitute the base of the pyramid. 相似文献
15.
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
16.
Tali Lavy Yana Sheynin Moshe Kapon Menahem Kaftory 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(1):o50-o53
The crystal structures of three 1:2 inclusion compounds that consist of host molecule 2,5‐diphenylhydroquinone (C18H14O2) and the guest molecules 2‐pyridone (C5H5NO), 1,3‐diphenyl‐2‐propen‐1‐one (chalcone, C15H12O) and 1‐(4‐methoxyphenyl)‐3‐phenyl‐2‐propen‐1‐one (4′‐methoxychalcone, C16H14O2) were determined in order to study the ability of guest molecules in inclusion compounds to undergo photoreaction. All of the crystals were found to be photoresistant. The three inclusion compounds crystallize in triclinic space group . In each case, the host/guest ratio is 1:2, with the host molecules occupying crystallographic centers of symmetry and the guest molecules occupying general positions. The guest molecules in each of the inclusion compounds are linked to the host molecules by hydrogen bonds. In the inclusion compound where the guest molecule is pyridone, the host molecule is disordered so that the hydroxy groups are distributed between two different sites, with occupancies of 0.738 (3) and 0.262 (3). The pyridone molecules form dimers via N—H⋯O hydrogen bonds. 相似文献
17.
F. Bentefrit P. Lemoine D. Nguyen‐Huy G. Morgant B. Viossat 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):m331-m333
The asymmetric unit of the title compound, [Ni(C11H16ClN5)2]Cl2·C3H7NO, contains one monomeric nickel(II) complex cation, two Cl− anions and one dimethylformamide solvent molecule. The Ni atom is coordinated to each of two 1‐(p‐chlorophenyl)‐5‐isopropylbiguanide (proguanil) ligands via two N atoms. The complex exhibits a square‐planar coordination, with the Ni atom lying 0.021 (2) Å out of the basal plane. The crystal packing is characterized by several hydrogen bonds. 相似文献
18.
Ayhan Elmali Ebru Kavlakoglu YalcÛn Elerman Ingrid Svoboda 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(9):1097-1099
The title compound, aquachloro{4,4′‐dibromo‐2,2′‐[o‐phenylenebis(nitrilomethylidyne)]diphenolato‐O,N,N′,O′}iron(III)–chloro{4,4′‐dibromo‐2,2′‐[o‐phenylenebis(nitrilomethyli‐dyne)]diphenolato‐O,N,N′,O′}iron(III)–dimethylformamide (1/1/1), [FeCl(C20H12Br2N2O2)][FeCl(C20H12Br2N2O2)(H2O)]·C3H7NO, contains one independent five‐coordinate [FeCl(C20H12Br2N2O2)] monomer, one six‐coordinate [FeCl(C20H12Br2N2O2)(H2O)] monomer and a non‐coordinating dimethylformamide solvent molecule in the asymmetric unit. In the five‐coordinate monomer, the Fe atom shows distorted square‐pyramidal geometry, with the N and O atoms of the ligand at the base and the Cl atom at the apex of the pyramid. In the six‐coordinate monomer, the Fe atom is in a distorted octahedral geometry and coordinated by the donor atoms of the tetrafunctional ligand in the horizontal plane, and the coordination sphere is completed by the O atom of the water molecule and the Cl atom at the axial positions. The title compound contains intermolecular O—H?O hydrogen bonds. Apart from these hydrogen bonds, there are also intermolecular C—H?Cl and C—H?O contacts. 相似文献
19.
Ying Xu Hong‐Xi Li Wen‐Hua Zhang Yong Zhang Jian‐Ping Lang 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(1):m4-m6
In the title compound, [Cu2I2(C11H16N4)2], each of the two crystallographically equivalent Cu atoms is tetrahedrally coordinated by two N atoms from one 1,1′‐methylenebis(3,5‐dimethyl‐1H‐pyrazole) ligand and two bridging iodide anions. The molecule has a crystallographic center of symmetry located at the mid‐point of the Cu·Cu line. One H atom of the CH2 group of the 1,1′‐methylenebis(3,5‐dimethyl‐1H‐pyrazole) ligand interacts with an iodide ion in an adjacent molecule to afford pairwise intermolecular C—H·I contacts, thereby forming chains of molecules running along the [101] direction. 相似文献
20.
Dubravka Matkovi‐alogovi Jasminka Popovi Zora Popovi Igor Picek
eljka Soldin 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):m39-m40
The title compound, [HgBr(C7H4NO4)(H2O)], was obtained by the reaction of an aqueous solution of mercury(II) bromide and pyridine‐2,6‐dicarboxylic acid (picolinic acid, dipicH2). The shortest bond distances to Hg are Hg—Br 2.412 (1) Å and Hg—N 2.208 (5) Å; the corresponding N—Hg—Br angle of 169.6 (1)° corresponds to a slightly distorted linear coordination. There are also four longer Hg—O interactions, three from dipicH? [2.425 (4) and 2.599 (4) Å within the asymmetric unit, and 2.837 (4) Å from a symmetry‐related molecule] and one from the bonded water molecule [2.634 (4) Å]. The effective coordination of Hg can thus be described as 2+4. The molecules are connected to form double‐layer chains parallel to the y axis by strong O—H?O hydrogen bonds between carboxylic acid groups of neighbouring molecules, and by weaker hydrogen bonds involving both H atoms of the water molecule and the O atoms of the carboxylic acid groups. 相似文献