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1.
Yu‐Mei Dai En Tang Jin‐Feng Huang Qiu‐Yan Yang 《Acta Crystallographica. Section C, Structural Chemistry》2008,64(10):m349-m352
The asymmetric unit of the title compound, {[Cu(CO3)(C14H14N4)1.5]·0.5C14H14N4·5H2O}n, contains one CuII cation in a slightly distorted square‐pyramidal coordination environment, one CO32− anion, one full and two half 1,4‐bis(imidazol‐1‐ylmethyl)benzene (bix) ligands, one half‐molecule of which is uncoordinated, and five uncoordinated water molecules. One of the coordinated bix ligands and the uncoordinated bix molecule are situated about centers of symmetry, located at the centers of the benzene rings. The coordinated bix ligands link the copper(II) ions into a [Cu(bix)1.5]n molecular ladder. These molecular ladders do not form interpenetrated ladders but are arranged in an ABAB parallel terrace, i.e. with the ladders arranged one above another, with sequence A translated with respect to B by 8 Å. To best of our knowledge, this arrangement has not been observed in any of the molecular ladder frameworks synthesized to date. The coordination environment of the CuII atom is completed by two O atoms of the CO32− anion. The framework is further strengthened by extensive O—H...O and O—H...N hydrogen bonds involving the water molecules, the O atoms of the CO32− anion and the N atoms of the bix ligands. This study describes the first example of a molecular ladder coordination polymer based on bix and therefore demonstrates further the usefulness of bix as a versatile multidentate ligand for constructing coordination polymers with interesting architectures. 相似文献
2.
Shi Zhou Chuan‐Bi Li Qing‐Wei Wang Seik Weng Ng 《Acta Crystallographica. Section C, Structural Chemistry》2011,67(7):m224-m226
In the title cadmium(II) complex, [Cd(C8H4O5)(C14H14N4)(H2O)]n, the 5‐hydroxybenzene‐1,3‐dicarboxylate (5‐OH‐1,3‐bdc) and 1,4‐bis(imidazol‐1‐ylmethyl)benzene (1,4,‐bix) ligands bridge water‐coordinated CdII atoms to generate a three‐dimensional network. Two carboxylate groups from different ligands function as O,O′‐chelates, while two imidazole N atoms from different ligands coordinate in a monodentate fashion, and one water molecule completes the seven‐coordinate pentagonal bipyramid around the CdII atom, in which the N atoms occupy the axial sites and the O atoms occupy the equatorial sites. The overall architecture is a twofold interpenetrated CdSO4‐type framework. The two crystallographically equivalent frameworks are linked by O—H...O hydrogen bonds between the water, hydroxy and carboxylate groups. 相似文献
3.
Shi Zhou Bo Liu Chuan‐Bi Li 《Acta Crystallographica. Section C, Structural Chemistry》2009,65(2):m107-m109
In the title coordination compound, {[Cd(C8H10O4)(C10H14N4)]·0.5H2O}n, the 1,1′‐(butane‐1,4‐diyl)diimidazole ligand and the cyclohexane‐1,4‐dicarboxylate dianion both function in a bridging mode to link adjacent cadmium(II) centers into a two‐dimensional four‐connected (4,4) network. The networks are parallel to the (001) plane. Two (4,4) networks are interpenetrated in an unusual parallel mode. The compound is the first two‐dimensional parallel interpenetrating (4,4) network structure based on a flexible dicarboxylate and a long bidentate N‐donor ligand. The interpenetrating nets are further consolidated by water–carboxylate O—H...O hydrogen bonds. 相似文献
4.
Yan Wang Ying‐Zhong Shen 《Acta Crystallographica. Section C, Structural Chemistry》2008,64(8):m283-m285
The title novel heterometallic 3d–4f coordination polymer, {[CuEr2(C5HN2O4)2(C2O4)(H2O)6]·3H2O}n, has a three‐dimensional metal–organic framework composed of two types of metal atoms (one CuII and two ErIII) and two types of bridging anionic ligands [3,5‐dicarboxylatopyrazolate(3−) (ptc3−) and oxalate]. The CuII atom is four‐coordinated in a square geometry. The ErIII atoms are both eight‐coordinated, but the geometries at the two atoms appear different, viz. triangular dodecahedral and bicapped trigonal prismatic. One of the oxalate anions is located on a twofold axis and the other lies about an inversion centre. Both oxalate anions act as bis‐bidentate ligands bridging the latter type of Er atoms in parallel zigzag chains. The pdc3− anions act as quinquedentate ligands not only chelating the CuII and the triangular dodecahedral ErIII centres in a bis‐bidentate bridging mode, but also connecting to ErIII centres of both types in a monodentate bridging mode. Thus, a three‐dimensional metal–organic framework is generated, and hydrogen bonds link the metal–organic framework with the uncoordinated water molecules. This study describes the first example of a three‐dimensional 3d–4f coordination polymer based on pyrazole‐3,5‐dicarboxylate and oxalate, and therefore demonstrates further the usefulness of pyrazoledicarboxylate as a versatile multidentate ligand for constructing heterometallic 3d–4f coordination polymers with interesting architectures. 相似文献
5.
M. John Plater Mark R. St J. Foreman R. Alan Howie 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(10):m487-m489
The structure of the title compound, [Co4(C9H3O6)2(OH)2(C8H6N4)(H2O)2]·2H2O, contains three separate species, namely the μ5‐bridging C9H3O63? anion, the doubly chelating and therefore μ2‐bridging C8H6N4 ligand (bipyrimidine, BPM), and the dihydrated diaquadihydroxy tetranuclear cationic cluster, [Co4(OH?)2(H2O)2]6+·2H2O, which lies on a crystallographic centre of symmetry, as does the BPM ligand with, in this case, the centre of symmetry coincident with the midpoint of the C—C bond joining the six‐membered rings. Within the cation cluster, the Co atoms of one pair are five‐coordinate and those of the other six‐coordinate. 相似文献
6.
Xiao‐Dan Wang Guang‐Feng Hou Ying‐Hui Yu Jin‐Sheng Gao 《Acta Crystallographica. Section C, Structural Chemistry》2012,68(12):m336-m339
The title compound, {[Ni(C9H4O6)(C14H14N4)]·0.41H2O}n, exhibits a three‐dimensional hydrogen‐bonded supramolecular framework. The NiII cation is six‐coordinated in a distorted triangular prism defined by two N atoms from two 1,3‐bis(imidazol‐l‐ylmethyl)benzene (bix) ligands and four O atoms from two 5‐carboxybenzene‐1,3‐dicarboxylate (HBTC) dianions. The bix molecules and HBTC dianions both act as bidentate ligands, linking the NiII cations to form a one‐dimensional coordination polymer. A two‐dimensional wave‐like net is constructed by O—H...O hydrogen bonds linking adjacent chains. Partially occupied solvent water molecules fill the cavities and link these layers to form a three‐dimensional supramolecular structure via O—H...O hydrogen bonds. The title compound was also characterized by powder X‐ray diffraction and thermogravimetric analysis. 相似文献
7.
Fa‐Yan Meng Xu‐Qing Liu Seik Weng Ng 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(7):m341-m342
The terephthalate dianion and the bis(imidazolyl)benzene ligand of the title compound, {[Zn(C8H4O4)(C20H14N4)]·C2H6O}n, each bridges two adjacent zinc centers, resulting in a layer‐type coordination polymer; the zinc center shows tetrahedral coordination. The disordered ethanol solvent molecules occupy the spaces between the layers and are hydrogen bonded to the layers. The two symmetry‐independent dianions lie on different inversion sites. 相似文献
8.
Li‐Juan Chen Zheng‐Guo Zhao Ming‐Xing Yang Xiao‐Hua Chen 《Acta Crystallographica. Section C, Structural Chemistry》2009,65(10):m374-m376
The title neutral polymer, [Gd(C6H4NO2)(C8H4O4)(H2O)2]n, contains an extended two‐dimensional wave‐like lanthanide carboxylate layer decorated by isonicotinate (IN) ligands. The GdII atom is eight‐coordinated by four carboxylate O atoms from four benzene‐1,2‐dicarboxylate (1,2‐bdc) ligands, two 1,2‐bdc carboxylate O atoms from one chelating IN ligand and two terminal water molecules, forming a bicapped trigonal–prismatic coordination geometry. The wave‐like layers are stacked in an …ABAB… packing mode along the c‐axis direction. Strong hydrogen‐bonding interactions further stabilize the structure of the title compound. 相似文献
9.
Gansheng Huang Dongsheng Liu Xihe Huang Changcang Huang Xiaohuan Qin 《Acta Crystallographica. Section C, Structural Chemistry》2008,64(11):m369-m371
In the title compound, [Pb(C6H4NO2)(N3)(H2O)]n, the Pb ion is seven‐coordinated by three N atoms from three azide ligands, two O atoms from two isonicotinate (inic) ligands and two O atoms from two coordinated water molecules, forming a distorted monocapped triangular prismatic coordination geometry. Each azide ligand bridges three PbII ions in a μ1,1,3 coordination mode to form a two‐dimensional three‐connected 63 topology network extending in the bc plane. The carboxylate group of the inic unit and the aqua ligand act as coligands to bridge PbII ions. Adjacent two‐dimensional layers are connected by hydrogen‐bonding interactions between the isonicotinate N atom and the water molecule, resulting in an extended three‐dimensional network. The title complex is the first reported coordination polymer involving a p‐block metal, an azide and a carboxylate. 相似文献
10.
Hong Shen 《Acta Crystallographica. Section C, Structural Chemistry》2014,70(11):1025-1028
The title CdII coordination polymer, [Cd(C10H8O4)(C12H12N6)0.5(H2O)]n, has been obtained by the hydrothermal method and studied by single‐crystal X‐ray diffraction, elemental analysis, thermogravimetric analysis, IR spectroscopy and fluorescence spectroscopy. The compound forms a novel three‐dimensional framework with 3,8‐connected three‐dimensional binodal {4.52}2{42.510.612.7.83} topology. An investigation of its photoluminescence properties shows that the compound exhibits a strong fluorescence emission in the solid state at room temperature. 相似文献
11.
Al‐shima'a A. Massoud Vratislav Langer Morsy A. M. Abu‐Youssef Lars
hrstrm 《Acta Crystallographica. Section C, Structural Chemistry》2011,67(1):m1-m4
The title compound, [Ag(C6H4N3O3)]n or [Ag(pyzca)]n (where pyzca is 3‐aminocarbonylpyrazine‐2‐carboxylate), (I), was obtained by silver‐catalysed partial hydrolysis of pyrazine‐2,3‐dicarbonitrile in aqueous solution. The compound has a distorted trigonal–planar coordination geometry around the AgI ion, with each ligand bridging three AgI ions to form a one‐dimensional strand of molecules parallel to the b axis. An extensive hydrogen‐bond pattern connects these strands to form a three‐dimensional network of mog topology. 相似文献
12.
Yi‐Cheng Shen Zhao‐Ji Li Ye‐Yan Qin Yuan‐Gen Yao 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(4):m135-m136
The title compound, [Zn(SO4)(C12H10N2)]n, features a layered structure based on [Zn(SO4)]n spirals linked by 1,2‐di‐4‐pyridylethylene (bpe) ligands, with the tetrahedral Zn and S atoms lying on twofold axes. The bpe ligands are centrosymmetric. The layers are linked by weak C—H⋯O interactions. 相似文献
13.
Thidarat Chotkhun Sujittra Youngme Narongsak Chaichit 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(2):m59-m61
In the title dinuclear acetate‐bridged complex, [Cu2(C2H3O2)3(NCS)(C10H9N3)2], the two Cu atoms are five‐coordinated, with a basal plane consisting of two N atoms of a di‐2‐pyridylamine (dpyam) ligand and two O atoms of two different acetate ligands. The axial positions of these Cu atoms are coordinated to N and O atoms from thiocyanate and acetate molecules, respectively, leading to a distorted square‐pyramidal geometry with τ values of 0.30 and 0.22. Both CuII ions are linked by an acetate group in the equatorial–equatorial positions and have syn–anti bridging configurations. Hydrogen‐bond interactions between the amine H atom and the coordinated and uncoordinated O atoms of the acetate anions generate an infinite one‐dimensional chain. 相似文献
14.
Kateryna Gubina Vladimir Ovchynnikov Vladymir Amirkhanov Svetlana Shishkina 《Acta Crystallographica. Section C, Structural Chemistry》2013,69(6):606-609
In the title complex, [Cu(C16H16Cl3N3O2P)Cl(C12H8N2)], the CuII cation presents a square‐pyramidal environment, where the CuO2N2 base is formed by two O atoms from carbonyl and phosphoryl groups, and by two N atoms from a 1,10‐phenanthroline molecule. A coordinated Cl atom occupies the apex. N—H...Cl hydrogen bonds link the molecules into one‐dimensional chains. The trichloromethyl group is rotationally disordered over two positions, with occupancies of 0.747 (7) and 0.253 (7). 相似文献
15.
Min Jiang Jun Li Feng‐Xing Zhang 《Acta Crystallographica. Section C, Structural Chemistry》2004,60(10):m501-m503
The title compound, [Mn(C14H8O4)(C12H12N2)]n, with a novel three‐dimensional framework, has been prepared by a hydrothermal reaction at 433 K. Each Mn atom lies on a twofold axis in a slightly distorted octahedral geometry, coordinated by two N atoms from two benzidine ligands and four O atoms from three symmetry‐related biphenyl‐2,2′‐dicarboxylate (bpdc) ligands. The benzidine ligands lie about inversion centres and the bpdc ligands about twofold axes. Each bpdc ligand is bonded to three Mn ions to form a continuous chain of metal ions. The bpdc ligands are accommodated in a series of distorted holes resembling hexagonal prisms. 相似文献
16.
Jian‐Hai Luo Chang‐Cang Huang Xi‐He Huang Jin‐Gen Wang 《Acta Crystallographica. Section C, Structural Chemistry》2008,64(3):m121-m122
The title compound, [Cu2Fe3(C5H5)3(C2H3O2)(C6H4O2)3(C3H7NO)2], belongs to the classic dimeric paddle‐wheel structure type. It is an unusual example in that it contains two different carboxylate groups, viz. ferrocenecarboxylate and acetate. With three ferrocenecarboxylate groups and only one acetate group bridging the two Cu centres, a noncentrosymmetric molecular arrangement results. 相似文献
17.
Jian‐Li Lin Yue‐Qing Zheng 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(12):m501-m503
In the title compound, [Cu2(C6H8O4)(C6H9O4)2(C10H8N2)2(H2O)2]n, the square‐pyramidally coordinated Cu atoms are bridged by both 4,4‐bipyridine and adipate ligands into ladder‐like chains, with exo‐orientated 5‐carboxypentanoate ligands pendant from both side rails. Half of the adipate ligand is related to the other half by inversion symmetry. Interchain O—H⋯O hydrogen bonds from the aqua ligands to the carbonyl O atoms of the 5‐carboxypentanoate ligands are responsible for the formation of two‐dimensional grid‐like (4,4)‐networks, which complete a twofold interpenetration. 相似文献
18.
Ming‐Lin Guo Chen‐Hu Guo 《Acta Crystallographica. Section C, Structural Chemistry》2008,64(10):m342-m344
In the title complex, {[Cd2(C8H3NO6)2(C4H10N2)(H2O)4]·2H2O}n, the CdII atoms show distorted octahedral coordination. The two carboxylate groups of the dianionic 2‐nitroterephthalate ligand adopt monodentate and 1,2‐bridging modes. The piperazine molecule is in a chair conformation and lies on a crystallographic inversion centre. The CdII atoms are connected via three O atoms from two carboxylate groups and two N atoms from piperazine molecules to form a two‐dimensional macro‐ring layer structure. These layers are further aggregated to form a three‐dimensional structure via rich intra‐ and interlayer hydrogen‐bonding networks. This study illustrates that, by using the labile CdII salt and a combination of 2‐nitroterephthalate and piperazine as ligands, it is possible to generate interesting metal–organic frameworks with rich intra‐ and interlayer O—H...O hydrogen‐bonding networks. 相似文献
19.
Graeme J. Gainsford Najeh Al‐Salim Tim Kemmitt 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(10):m509-m510
The title compound, [TiZr(C5H11NO2)3(C3H7O)2], contains three methyliminodiethanolate ligands, two in different μ‐oxo bridging coordination modes and one bound only to the Ti atom. The Ti and Zr atoms have distorted octahedral and pentagonal–bipyramidal coordinations, respectively, which share edges. As well as some conformational disorder in the carbon chains, there is chemical disorder at one Ti site, with a mix of n‐ and isopropanolate ligands. 相似文献
20.
Zi‐Liang Wang Ming‐Xue Li 《Acta Crystallographica. Section C, Structural Chemistry》2010,66(10):m311-m313
The asymmetric unit of the title two‐dimensional coordination polymer, [Co2(C16H6O8)(C14H14N4)2]n, contains one Co2+ ion, half of a biphenyl‐3,3′,4,4′‐tetracarboxylate (bptc) anion lying about an inversion centre and one 1,4‐bis(imidazol‐1‐ylmethyl)benzene (bix) ligand. The CoII atom is coordinated by three carboxylate O atoms from two different bptc ligands and two N atoms from two bix ligands constructing a distorted square pyramid. Each Co2+ ion is interlinked by two bptc anions, while each bptc anion coordinates to four Co atoms as a hexadentate ligand so that four CoII atoms and four bptc anions afford a larger 38‐membered ring. These inorganic rings are further extended into a two‐dimensional undulated network in the (10) plane. Two CoII atoms in adjacent 38‐membered rings are joined together by pairs of bix ligands forming a 26‐membered [Co2(bix)2] ring that is penetrated by a bptc anion; these components share a common inversion centre. 相似文献