共查询到20条相似文献,搜索用时 31 毫秒
1.
Bernadette S. Creaven R. Alan Howie Conor Long 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(4):385-387
In pentacarbonyl(4‐phenylpyridine)tungsten(0), [W(C11H9N)(CO)5], the molecules have mm site symmetry and the pyridine ligand, with m symmetry, is completely planar. In pentacarbonyl(2‐phenylpyridine)chromium(0), [Cr(C11H9N)(CO)5], the molecules are in general positions and the phenyl and pyridine rings of the ligand are twisted by 67.7 (3)° with respect to one another by rotation about the C—C bond joining them. In both compounds, the axial M—Ccarbonyl bond trans to the M—Nligand bond is significantly shorter than the equatorial M—Ccarbonyl bonds. 相似文献
2.
Manfredo Hrner Lorenzo do C. Visentin Marisa Dahmer Jairo Bordinhao 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(5):m286-m287
In the title complex, [Pd(C12H8FN4O2)2(C5H5N)2] or trans‐[Pd(FC6H4N=N—NC6H4NO2)(C5H5N)2], the Pd atom lies on a centre of inversion in space group P. The coordination geometry about the Pd2+ ion is square planar, with two deprotonated 3‐(2‐fluorophenyl)‐1‐(4‐nitrophenyl)triazenide ions, FC6H4N=N—NC6H4NO2?, acting as monodentate ligands (two‐electron donors), while two neutral pyridine molecules complete the metal coordination sphere. The whole triazenide ligand is not planar, with the largest interplanar angle being 16.8 (5)° between the phenyl ring of the 2‐fluorophenyl group and the plane defined by the N=N—N moiety. The Pd—N(triazenide) and Pd—N(pyridine) distances are 2.021 (3) and 2.039 (3) Å, respectively. 相似文献
3.
Manfredo Hrner Vanessa S. Carratu Jairo Bordinhao Angela Silva Elke Niquet 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(3):m140-m142
In the title compound, [Cd(C12H8F2N3)2(C5H5N)2], the Cd atom lies on a crystallographic twofold axis in space group Iba2. The coordination geometry about the CdII ion corresponds to a rhombically distorted octahedron, with two deprotonated 1,3‐bis(2‐fluorophenyl)triazenide ions, viz. FC6H4NNNC6H4F−, acting as bidentate ligands (four‐electron donors). Two neutral pyridine (py) molecules complete the coordination sphere in positions cis with respect to one another. The triazenide ligand is not planar (r.m.s. deviation = 0.204 Å), the dihedral angle between the phenyl rings of the terminal 2‐fluorophenyl substituents being 24.6 (1)°. The triazenide and pyridine Cd—N distances are 2.3757 (18)/2.3800 (19) and 2.3461 (19) Å, respectively. Intermolecular C—H⋯F interactions generate sheets of molecules in the (010) plane. 相似文献
4.
Georgia M. Arvanitis Charles E. Holmes Diana G. Johnson Michael Berardini 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(11):1332-1333
The title complex, [PtCl2(C6H7NO)(C2H6OS)], exhibits square‐planar geometry. The plane of the pyridine ring makes a dihedral angle of 67.2 (3)° with the square plane of the metal center. The S—O bond is nearly aligned with the adjacent Pt—N bond, leaving the methyl groups of the dimethyl sulfoxide ligand to stagger the Pt—Cl bond. 相似文献
5.
Necmi Dege Hasan Ibudak Elif Adyaman 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(1):m13-m15
In the crystal structure of the title compound [systematic name: diaquabis(6‐methyl‐2,2‐dioxo‐1,2,3‐oxathiazin‐4‐olato‐κO4)bis(3‐methylpyridine‐κN)nickel(II)], [Ni(C4H4NO4S)2(C6H7N)2(H2O)2], the NiII centre resides on a centre of symmetry and has a distorted octahedral geometry. The basal plane is formed by two carbonyl O atoms of two monodentate trans‐oriented acesulfamate ligands and two trans aqua ligands. The axial positions in the octahedron are occupied by two N atoms of two trans pyridine ligands. Molecules are stacked in columns running along the a axis. There are π–π stacking interactions between the molecules in each column, with a distance of 3.623 (2) Å between the centroids of the pyridine rings. There are also O—H⋯O interactions between the columns. 相似文献
6.
Richeng Xuan Weixiao Hu Zhongyu Yang Rirong Xuan 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(4):m112-m114
In the crystals of the title compound, [CuCl2(C6H6ClN)2], the Cu atom lies on an inversion centre and is four‐coordinated by two pyridine N atoms and two Cl atoms in trans positions. The coordination geometry is square planar, with Cu—N and Cu—Cl distances of 1.986 (2) and 2.2536 (11) Å, respectively. The two pyridine rings are parallel, but twist from the CuN2Cl2 coordination plane by about 95° in the complex molecule. There are three kinds of intermolecular C—H⃛Cl hydrogen bonds in the crystals. Two of these types generate two‐dimensional molecular networks, viewed in the direction of the a axis, and the other connects adjacent molecular networks. 相似文献
7.
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
8.
Muharrem Diner Namk
zdemir M. Emin Günay Bekir etinkaya Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(8):m373-m375
The title complex, [RhBr(C8H12)(C19H22N2O2)], has a distorted square‐planar geometry. There are two molecules, A and B, in the asymmetric unit. The Rh—C bond distance between the N‐heterocyclic ligand and the metal atom is 2.039 (2) Å in molecule A and 2.042 (2) Å in molecule B. The angle between the carbene heterocycle and the coordination plane is 87.56 (12)° in molecule A and 87.03 (11)° in molecule B. It is shown that the average Rh—C(COD) (COD is cyclooctadiene) distance is linearly dependent on the Rh—C(imidazolidine) distance in this type of compound. This can be ascribed to the steric hindrance produced by the packing. The crystal structure contains intramolecular C—H⋯O and intermolecular C—H⋯Br interactions. 相似文献
9.
Ri‐Cheng Xuan Min Xu Dong‐Ping Cheng 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(12):m587-m589
In the title compound, [CuCl2(C9H12N2O)], the CuII atom is coordinated by two Cl− anions and two N atoms of one O‐ethyl 3‐methylpyridine‐2‐carboximidic acid molecule in a slightly distorted square‐planar geometry, with Cu—N distances of 2.0483 (17) and 1.9404 (18) Å, and Cu—Cl distances of 2.2805 (10) and 2.2275 (14) Å. In addition, each CuII atom is connected by one Cl− anion and the CuII atom from a neighbouring molecule, with Cu⋯Cl and Cu⋯Cu distances of 2.9098 (13) and 3.4022 (12) Å, respectively, and, therefore, a centrosymmetric dimer is formed. Adjacent molecular dimers are connected by π–π stacking interactions between pyridine rings to form a zigzag molecular chain. The molecular chains are also enforced by N—H⋯Cl and C—H⋯Cl interactions. 相似文献
10.
Sari Paavola Francesc Teixidor Clara Vias Raikko Kiveks 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(4):m237-m239
The asymmetric unit of the title complex, [PtCl2(C14H38B10P2)]·0.5CH2Cl2 or cis‐[PtCl2{1,2‐(PiPr2)2‐1,2‐C2B10H10}]·0.5CH2Cl2, contains one disordered solvent molecule and two molecules of the complex, in which each PtII atom displays slightly distorted square‐planar coordination geometry. The P atoms connected to the cage C atoms are coordinated to the PtII atom. The Pt—P distances vary slightly [2.215 (3) and 2.235 (4) Å] and the Pt—Cl distances are equal [2.348 (3) and 2.353 (5) Å]. 相似文献
11.
Hui‐Fen Qian Wei Huang 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(8):m349-m351
The title compound, [Cu(ClO4)(C5H6N2)2(C12H12N2)]ClO4, was prepared by in situ partial ligand substitution between 3‐aminopyridine and 4,4′‐dimethyl‐2,2′‐bipyridine at room temperature. The central copper(II) ion is five‐coordinated by one bidentate 4,4′‐dimethyl‐2,2′‐bipyridine molecule, two monodentate pyridine‐coordinated 3‐aminopyridine molecules and one apical O atom from the perchlorate counter‐ion. Intermolecular N—H⋯O and C—H⋯O hydrogen‐bonding interactions form a hydrogen‐bond‐sustained network. 相似文献
12.
Cem Cüneyt Ersanl idem Albayrak Mustafa Odabaolu Carsten Thne Ahmet Erdnmez 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(2):o133-o135
The structure of the title compound, C18H20ClN3O5, displays the characteristic features of azobenzene derivatives. Intramolecular N—H⋯O, weak intramolecular C—H⋯O, and intermolecular O—H⋯O and C—H⋯O interactions influence the conformation of the molecules and the crystal packing. Intermolecular hydrogen bonds link the molecules into infinite chains, and the title compound adopts the keto–amine tautomeric form. The azobenzene moiety of the molecule has a trans configuration. The molecule is not planar, and the dihedral angle between the two phenyl rings is 35.6 (2)°. 相似文献
13.
Xiaoming Liu Colin A. Kilner Mark Thornton‐Pett Malcolm A. Halcrow 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):m10-m11
The title compound, [Cu(C9H7N2O)2]·2CH3OH, contains a crystallographically centrosymmetric near‐regular square planar CuII centre with trans‐disposed chelating ligands. The complex molecules associate into a one‐dimensional polymeric chain via hydrogen bonding to the solvent molecules. 相似文献
14.
Alexander S. Lyakhov Dmitry O. Ivashkevich Sergei V. Voitekhovich Pavel N. Gaponik 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(12):m563-m564
The title compound, [CuCl2(C5H11N5)], is the first structurally characterized molecular chelate complex involving an α‐aminoalkyltetrazole. There are two complex molecules in the asymmetric unit. The ligand molecules are bidentate. Both Cu atoms reveal rather distorted square‐planar coordinations. The complex molecules are linked together by van der Waals interactions only. 相似文献
15.
(2,9‐Dimethyl‐1,10‐phenanthroline‐κ2N,N′)(pyridine‐2,6‐dicarboxylato‐κ3O2,N,O6)copper(II) trihydrate
Ibrahim Uar Ahmet Bulut Orhan Büyükgüngr 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(11):m479-m481
The copper(II) centre in the mononuclear title complex, [Cu(C7H3NO4)(C14H12N2)]·3H2O, is surrounded by one bidentate 2,9‐dimethyl‐1,10‐phenanthroline (dmphen) ligand and one tridentate pyridine‐2,6‐dicarboxylate ligand, and exhibits a distorted square‐pyramidal geometry. The crystal packing involves both hydrogen‐bonding and π–π interactions. The solvent water molecules link monomers to one another through hydrogen‐bonding interactions, forming ladder‐like chains in the bc plane. Face‐to‐face and slipped π–π interactions also occur between dmphen rings of neighboring molecules and are responsible for interchain packing. 相似文献
16.
Alan Hazell Christine J. McKenzie Jimmi Nielsen 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(7):859-860
The title compound, C9H9NS3, crystallizes with two molecules in the asymmetric unit. In both molecules, the dithiane‐2‐thione rings adopt a symmetric half‐boat conformation with the C atom opposite the C—Sthione bond out of the plane. The pyridine ring is in an equatorial position and is twisted out of the plane of the half‐boat by 82.7 (2) and 84.5 (2)° in the two molecules, so that the N atom is trans to the axial C—H bond in both cases. 相似文献
17.
Chengbing Ma Cheng Fan Changneng Chen Qiutian Liu 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(11):m553-m555
In the title compound [systematic name: aqua(1,10‐phenanthroline‐κ2N,N′)(pyridine‐2,6‐dicarboxylato‐κ3O2,N,O6)manganese(II) monohydrate, [Mn(C7H3NO4)(C12H8N2)(H2O)]·H2O, the manganese(II) centre is surrounded by one bidentate phenanthroline ligand [Mn—N = 2.248 (3) and 2.278 (3) Å], one tridentate dipicolinate ligand [Mn—N = 2.179 (3) Å, and Mn—O = 2.237 (2) and 2.266 (2) Å] and one water molecule [Mn—O = 2.117 (3) Å], and it exhibits a strongly distorted octahedral geometry, with trans angles ranging from 144.12 (9) to 158.88 (11)°. Extensive intermolecular hydrogen‐bonding interactions involving coordinated and uncoordinated water molecules and the carboxyl O atoms of the dipicolinate ligand, as well as a stacking interaction involving the phenanthroline rings, are observed in the crystal structure. 相似文献
18.
trans‐Diaquabis(5‐carboxy‐1H‐imidazole‐4‐carboxylato‐κ2N3,O4)cobalt(II) 4,4′‐bipyridine solvate
Rong Cao Yu‐Ling Wang Wen‐Hua Bi 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(12):m609-m611
In the title compound, [Co(C5H3N2O4)2(H2O)2]·C10H8N2, the Co atom is trans‐coordinated by two pairs of N and O atoms from two monoanionic 4,5‐dicarboxyimidazole ligands, and by two O atoms from two coordinated water molecules, in a distorted octahedral geometry. The 4,4′‐bipyridine solvent molecule is not involved in coordination but is linked by an N—H⋯N hydrogen bond to the neutral [Co(C5H3N2O4)2(H2O)2] molecule. Both molecules are located on inversion centers. The crystal packing is stabilized by N—H⋯N and O—H⋯O hydrogen bonds, which produce a three‐dimensional hydrogen‐bonded network. Offset π–π stacking interactions between the pyridine rings of adjacent 4,4′‐bipyridine molecules were observed, with a face‐to‐face distance of 3.345 (1) Å. 相似文献
19.
A. Subbiah Pandi D. Velmurugan S. Shanmuga Sundara Raj Hoong‐Kun Fun M. C. Bansal 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(6):o302-o304
The title compound, C19H20O6, crystallizes in the centrosymmetric space group P21/c with one molecule in the asymmetric unit. The molecule is approximately planar and the dihedral angle between the phenyl rings is 11.0 (1)°. The H atoms of the central propenone group are trans. There is an intramolecular O—H⃛O hydrogen bond and the molecules are crosslinked by four intermolecular C—H⃛O hydrogen bonds, producing a three‐dimensional network. 相似文献
20.
Manfredo Hrner Julieta Saldanha de Oliveira Jairo Bordinhao Johannes Beck 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(12):m586-m587
In the centrosymmetric title complex, [Ni(C7H7N4O3)2(C5H5N)2], the coordination geometry about the Ni2+ ion is octahedral, with two deprotonated 1‐methyl‐3‐(p‐nitrophenyl)triazenide 1‐oxide ions, viz. [O2NC6H4NNN(O)CH3]?, acting as bidentate ligands (four‐electron donors). Two neutral pyridine (py) molecules complete the coordination sphere in positions trans to each other. The triazenide 1‐oxide ligand is almost planar, the largest interplanar angle of 8.80 (12)° being between the phenyl ring of the p‐nitrophenyl group and the plane defined by the N3O moiety. The Ni—Ntriazenide, Ni—O and Ni—Npy distances are 2.0794 (16), 2.0427 (13) and 2.1652 (18) Å, respectively. 相似文献