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1.
Ying‐Quan Zou Xia Li Yan Li Huai‐Ming Hu 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(9):1048-1050
The title compound, tetrakis(μ‐2,3‐dimethoxybenzoato)‐κ4O:O′;κ6O,O′:O′‐bis[(2,2′‐bipyridine‐N,N′)(2,3‐dimethoxybenzoato‐O,O′)lanthanum(III)], [La2(2,3‐DMOBA)6(2,2′‐bpy)2], where 2,3‐DMOBA is 2,3‐dimethoxybenzoate (C9H9O4) and 2,2′‐bpy is 2,2′‐bipyridine (C10H8N2), is a dimer with a centre of inversion between the La atoms bridged by four carboxylate ligands. The central La atom is ennea‐coordinated and has a distorted monocapped square‐antiprism geometry. 相似文献
2.
Masood Parvez Saqib Ali Sajjad Ahmad Moazzam Hussain Bhatti Muhammad Mazhar 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(6):m334-m335
The crystal structure of catena‐poly[[tri‐n‐butyltin]‐μ‐3‐(1‐naphthylaminocarbonyl)acrylato‐κ2O1:O3], [Sn(C4H9)3(C14H10NO3)]n, is composed of polymeric chains wherein the metal center exhibits a distorted trigonal‐bipyramidal geometry, with three n‐butyl groups defining the trigonal plane [mean Sn—C 2.133 (7) Å] and the axial positions being occupied by the carboxylate O atoms of two different N‐(1‐naphthyl)maleamate ligands with inequivalent Sn—O distances [2.167 (4) and 2.457 (4) Å]. The N‐(1‐naphthyl)maleamate fragment forms an essentially planar seven‐membered ring involving an intramolecular N—H?O hydrogen bond. 相似文献
3.
Qiong‐Hua Jin Xia Li Ying‐Quan Zou Kai‐Bei Yu 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(6):676-677
Each Eu3+ ion in the title compound, catena‐poly[europium(III)‐tri‐μ‐4‐methylbenzoato‐O:O,O′;O:O,O′;O,O′:O′], {[Eu(C8H7O2)3]3}n, is coordinated by nine O atoms, and three Eu atoms form a trimeric unit. These trimeric units are linked by bridging–chelating carboxylates to form an infinite one‐dimensional polymer chain. 相似文献
4.
Ramn Macías Simon A. Barrett Jonathan Bould Udo Drfler Josef Holub John D. Kennedy Mark Thornton‐Pett Bohumil tíbr 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(5):520-522
Neutral 8‐(5‐iodo‐n‐pentyl)‐3‐(η5‐pentamethylcyclopentadienyl)‐arachno‐3‐rhoda‐7,8‐dithiaundecaborane, [Rh(C5H19B8IS2)(C10H15)], obtained from the [arachno‐7,8‐S2B9H10]? anion by treatment with I(CH2)5I followed by [Rh(C5Me5)Cl2]2 and N,N,N′,N′‐tetramethyl‐1,8‐diaminonaphthalene, has the 11‐vertex cluster geometry of [arachno‐7,8‐S2B9H10]?, but with an {Rh(C5Me5)} unit in the 3‐position instead of a {BH} unit, and with a –(CH2)5I chain attached exo to an S atom. 相似文献
5.
Hong‐Tao Zhang Xiao‐Zeng You 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(8):m313-m314
The asymmetric unit of the title one‐dimensional coordination polymer, catena‐poly[[μ‐pyridine‐2,3‐dicarboxylato‐1κO:2κ2N,O′‐bis[diaquacobalt(II)]]‐μ‐pyridine‐2,3‐dicarboxylato‐1κ2N,O:2κO′:1′κO′], [Co(C7H3NO4)(H2O)2]n, is composed of a cobalt(II) ion, a pyridine‐2,3‐dicarboxylate dianion and two water molecules. The polymer has a zigzag structure consisting of a chain of edge‐fused rings, and the polymer chains are linked by O—H⃛O hydrogen bonds into a three‐dimensional framework. 相似文献
6.
Bao‐Long Li Xia Zhu Jun‐Hui Zhou Yong Zhang 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(8):m373-m374
In the crystal structure of the title complex, poly[[diazidomanganese(II)]‐di‐μ‐1,2‐bis(imidazol‐1‐yl)ethane‐κ4N3:N3′], [Mn(N3)2(C8H10N4)2]n or [Mn(N3)2(bim)2]n, where bim is 1,2‐bis(imidazol‐1‐yl)ethane, each MnII atom is six‐coordinated in a distorted octahedral coordination environment to four N atoms from four bim ligands and two N atoms from two azide ligands. The MnII atoms, which lie on inversion centres, are bridged by four bim ligands to form a two‐dimensional (4,4)‐network. The azide ligands are monodentate (terminal). 相似文献
7.
In catena‐poly[[(di‐2‐pyridylamine‐κ2N,N′)silver(I)]‐μ‐nicotinato‐κ2N:O], [Ag(C6H4NO2)(C10H9N3)]n, the AgI atom is tetracoordinated by two N atoms from the di‐2‐pyridylamine (BPA) ligand [Ag—N = 2.3785 (18) and 2.3298 (18) Å] and by one N atom and one carboxylate O atom from nicotinate ligands [Ag—N = 2.2827 (15) Å and Ag—O = 2.3636 (14) Å]. Bridging by nicotinate N and O atoms generates a polymeric chain structure, which extends along [100]. The carboxyl O atom not bonded to the Ag atom takes part in an intrachain C—H⋯O hydrogen bond, further stabilizing the chain. Pairs of chains are linked by N—H⋯O hydrogen bonds to generate ribbons. There are no π–π interactions in this complex. In catena‐poly[[(di‐2‐pyridylamine‐κ2N,N′)silver(I)]‐μ‐2,6‐dihydroxybenzoato‐κ2O1:O2], [Ag(C7H5O4)(C10H9N3)]n, the AgI atom has a distorted tetrahedral coordination, with three strong bonds to two pyridine N atoms from the BPA ligand [Ag—N = 2.286 (5) and 2.320 (5) Å] and to one carboxylate O atom from the 2,6‐dihydroxybenzoate ligand [Ag—O = 2.222 (4) Å]; the fourth, weaker, Ag‐atom coordination is to one of the phenol O atoms [Ag⋯O = 2.703 (4) Å] of an adjacent moiety, and this interaction generates a polymeric chain along [100]. Pairs of chains are linked about inversion centers by N—H⋯O hydrogen bonds to form ribbons, within which there are π–π interactions. The ribbons are linked about inversion centers by pairs of C—H⋯O hydrogen bonds and additional π–π interactions between inversion‐related pairs of 2,6‐dihydroxybenzoate ligands to generate a three‐dimensional network. 相似文献
8.
2,3‐Dihydro‐4H‐thiopyrano[2,3‐b]pyridin‐4‐ones 4 were prepared by a three‐step sequence from commercially available 2‐chloropyridine ( 1 ). Thus, successive treatment of 1 with iPr2NLi (LDA) and α,β‐unsaturated aldehydes gave 1‐(2‐chloropyridin‐3‐yl)alk‐2‐en‐1‐ols 2 , which were oxidized with MnO2 to 1‐(2‐chloropyridin‐3‐yl)alk‐2‐en‐1‐ones 3 . The reactions of 3 with NaSH?n H2O proceeded smoothly at 0° in DMF to provide the desired thiopyranopyridinones. Similarly, 2,3‐dihydro‐4H‐thiopyrano[2,3‐c]pyridin‐4‐ones 8 and 2,3‐dihydro‐4H‐thiopyrano[3,2‐c]pyridin‐4‐ones 12 were obtained starting from 3‐chloropyridine ( 5 ) and 4‐chloropyridine ( 9 ), respectively. 相似文献
9.
Andreas Lemmerer David G. Billing 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(5):m174-m176
The title compound, {(C9H14N)4[Pb3I10]}n, crystallizes as an organic–inorganic hybrid. As such, the structure consists of a two‐dimensional inorganic layer of [Pb3I10]n4n− ions extending along [100]. The asymmetric unit contains two independent Pb atoms, viz. one in a general position and the other on an inversion centre. Each Pb atom is octahedrally coordinated by six iodide ions and exhibits both face‐ and corner‐sharing with adjacent atoms in the inorganic layer. These anionic layers alternate with 3‐phenylpropylammonium cations, which hydrogen bond to the iodides. Simple face‐to‐edge σ–π stacking interactions are observed between the aromatic rings that stabilize the overall three‐dimensional structure. This net structure has only been observed five times previously. 相似文献
10.
Matthias Tamm Dejan Petrovic Eberhardt Herdtweck 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(5):m217-m219
The title compound, (C11H22N3)[FeCl3(C11H21N3)], is one of the rare examples where an isolated ionic pair of the type [A]n+[EMX3]n− (E is any non‐metal, M is any transition metal and X is any halogen) could be structurally characterized. Two short N—H⋯Cl contacts between the two ammonium H atoms and two of the three Cl atoms of the counter‐anion generate a six‐membered ring. The third Cl atom is involved in a weaker intramolecular hydrogen bond to the neutral 1,3‐diisopropyl‐4,5‐dimethyl‐4‐imidazolin‐2‐ylideneamine ligand. 相似文献
11.
Hai‐Yan Ge Yu‐Mei Zhang Bao‐Long Li Yong Zhang 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(10):m501-m503
The coordination geometry of the CdII atom in the title complex, [Cd(NCS)2(C12H12N6)2]n or [Cd(NCS)2(mbtz)2]n, where mbtz is 1,3‐bis(1,2,4‐triazol‐1‐ylmethyl)benzene, is a distorted compressed octahedron in which the CdII atom lies on an inversion centre, coordinated by four N atoms from the triazole rings of four mbtz ligands and two N atoms from two monodentate NCS− ligands. The structure is polymeric, with 24‐membered spiro‐fused rings extending along [100] and with the 24‐membered ring containing two inversion‐related mbtz molecules. 相似文献
12.
Zhong‐Lu You 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(12):m532-m534
The title complex, [Cd2(C13H9Cl2N2O)2(NCS)2]n, is a novel thiocyanate‐bridged polynuclear cadmium(II) compound. The CdII atom is six‐coordinated in a distorted octahedral configuration, with one O and two N atoms of one Schiff base molecule and one terminal S atom of a bridging thiocyanate ligand defining the equatorial plane, and one terminal N atom of another bridging thiocyanate ligand and one O atom of another Schiff base molecule occupying axial positions. Adjacent inversion‐related [2,4‐dichloro‐6‐(2‐pyridylmethyliminomethyl)phenolato]cadmium(II) moieties utilize bridging phenolate and thiocyanate groups to form polymeric chains running along the b axis. 相似文献
13.
Shu‐Mei Chen Can‐Zhong Lu Ya‐Qin Yu Quan‐Zheng Zhang Xiang He 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(11):m549-m550
The title compound, [NaLaMo8O26(C3H7NO)7]n, contains infinite chains of [Mo8O26]4− units supporting dimethylformamide‐coordinated LaIII cations and linked by Na+ cations. The lanthanum center adopts a nine‐coordinate geometry and the Na atom is sandwiched between two β‐[Mo8O26]4− units. 相似文献
14.
A convenient three‐step procedure for the synthesis of three types of 3‐aryl‐2‐sulfanylthienopyridines 4, 8 , and 12 has been developed. The first step of the synthesis of thieno[2,3‐b]pyridine derivatives 4 is the replacement of the halo with a (sulfanylmethyl)sulfanyl group in aryl(2‐halopyridin‐3‐yl)methanones 1 by successive treatment with Na2S?9 H2O and chloromethyl sulfides to give aryl{2‐[(sulfanylmethyl)sulfanyl]pyridin‐3‐yl}methanones 2 . In the second step, these were treated with LDA (LiNiPr2) to give 3‐aryl‐2,3‐dihydro‐2‐sulfanylthieno[2,3‐b]pyridin‐3‐ols 3 , which were dehydrated in the last step with SOCl2 in the presence of pyridine to give the desired products. Similarly, thieno[2,3‐c]pyridine and thieno[3,2‐c]pyridine derivatives, 8 and 12 , respectively, can be prepared from aryl(3‐chloropyridin‐4‐yl)methanones 5 and aryl(4‐chloropyridin‐3‐yl)methanones 9 , respectively. 相似文献
15.
Xiaohua Peng Frank Seela Henning Eickmeier Hans Reuter 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(2):o96-o98
In the title compound [systematic name: 7‐(2‐deoxy‐β‐d ‐erythro‐pentofuranosyl)‐2‐fluoro‐7H‐pyrrolo[2,3‐d]pyrimidin‐2‐amine], C11H13FN4O3, the conformation of the N‐glycosylic bond is between anti and high‐anti [χ = −110.2 (3)°]. The 2′‐deoxyribofuranosyl unit adopts the N‐type sugar pucker (4T3), with P = 40.3° and τm = 39.2°. The orientation of the exocyclic C4′—C5′ bond is −ap (trans), with a torsion angle γ = −168.39 (18)°. The nucleobases are arranged head‐to‐head. The crystal structure is stabilized by four intermolecular hydrogen bonds of types N—H⋯N, N—H⋯O and O—H⋯O. 相似文献
16.
Reijo Sillanp Jordi Llop Clara Vias Francecs Teixidor Raikko Kiveks 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(8):900-901
In the title compound, (η5‐2,5‐dimethylpyrrolyl)[(7,8,9,10,11‐η)‐7‐methyl‐7,8‐dicarba‐nido‐undecaborato]cobalt(III), [3‐Co{η5‐[2,5‐(CH3)2‐NC4H2]}‐1‐CH3‐1,2‐C2B9H10] or [Co(C3H13B9)(C6H8N)], the CoIII atom is sandwiched between the pentagonal faces of the pyrrolyl and dicarbollide ligands, resulting in a neutral molecule. The C—C distance in the dicarbollide cage is 1.649 (3) Å. 相似文献
17.
Alexander S. Lyakhov Pavel N. Gaponik Michail M. Degtyarik Vadim E. Matulis Vitaly E. Matulis Ludmila S. Ivashkevich 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(3):m90-m92
In the crystal structure of the title compound, [Cu3Cl6(C4H6N4)4]n, there are three Cu atoms, six Cl atoms and four 2‐allyltetrazole ligands in the asymmetric unit. The polyhedron of one Cu atom adopts a flattened octahedral geometry, with two 2‐allyltetrazole ligands in the axial positions [Cu—N4 = 1.990 (2) and 1.991 (2) Å] and four Cl atoms in the equatorial positions [Cu—Cl = 2.4331 (9)–2.5426 (9) Å]. The polyhedra of the other two Cu atoms have a square‐pyramidal geometry, with three basal sites occupied by Cl atoms [Cu—Cl = 2.2487 (9)–2.3163 (8) and 2.2569 (9)–2.3034 (9) Å] and one basal site occupied by a 2‐allyltetrazole ligand [Cu—N4 = 2.028 (2) and 2.013 (2) Å]. A Cl atom lies in the apical position of either pyramid [Cu—Cl = 2.8360 (10) and 2.8046 (9) Å]. The possibility of including the tetrazole N3 atoms in the coordination sphere of the two Cu atoms is discussed. Neighbouring copper polyhedra share their edges with Cl atoms to form one‐dimensional polymeric chains running along the a axis. 相似文献
18.
Baolong Li Baozong Li Xia Zhu Liming Zhu Yong Zhang 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(9):m350-m351
The coordination geometry of the ZnII atom in the title complex, [Zn(C2N3)2(C6H8N6)2]n or [Zn(dca)2(bte)2]n, where bte is μ‐1,2‐bis(1,2,4‐triazol‐1‐yl)ethane and dca is dicyanamide, is distorted compressed octahedral, in which the ZnII atom lies on an inversion center and coordinates four N atoms from the triazole rings of four symmetry‐related bte ligands and two N atoms from two symmetry‐related monodentate dca ligands. The structure is polymeric, with 18‐membered spiro‐fused rings extending in the b direction and each 18‐membered ring involving two inversion‐related bte molecules. 相似文献
19.
Frank Seela Matthias Zulauf Hans Reuter Guido Kastner 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(4):489-491
The isomorphous structures of the title molecules, 4‐amino‐1‐(2‐deoxy‐β‐d ‐erythro‐pentofuranosyl)‐3‐iodo‐1H‐pyrazolo‐[3,4‐d]pyrimidine, (I), C10H12IN5O3, and 4‐amino‐3‐bromo‐1‐(2‐deoxy‐β‐d ‐erythro‐pentofuranosyl)‐1H‐pyrazolo[3,4‐d]pyrimidine, (II), C10H12BrN5O3, have been determined. The sugar puckering of both compounds is C1′‐endo (1′E). The N‐glycosidic bond torsion angle χ1 is in the high‐anti range [?73.2 (4)° for (I) and ?74.1 (4)° for (II)] and the crystal structure is stabilized by hydrogen bonds. 相似文献
20.
Xiaohua Peng Hans Reuter Henning Eickmeier Frank Seela 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(10):o593-o595
In 4‐chloro‐7‐(2‐deoxy‐β‐d ‐erythro‐pentofuranosyl)‐7H‐pyrrolo[2,3‐d]pyrimidine‐2,4‐diamine, C11H14ClN5O3, the conformation of the N‐glycosylic bond is between anti and high‐anti [χ = −102.5 (6)°]. The 2′‐deoxyribofuranosyl unit adopts the C3′‐endo‐C4′‐exo (3T4) sugar pucker (N‐type) with P = 19.6° and τm = 32.9° [terminology: Saenger (1989). Landolt‐Börnstein New Series, Vol. 1, Nucleic Acids, Subvol. a, edited by O. Madelung, pp. 1–21. Berlin: Springer‐Verlag]. The orientation of the exocyclic C4′—C5′ bond is +ap (trans) with a torsion angle γ = 171.5 (4)°. The compound forms a three‐dimensional network that is stabilized by four intermolecular hydrogen bonds (N—H⋯O and O—H⋯N) and one intramolecular hydrogen bond (N—H⋯Cl). 相似文献