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Poly[[tetra-μ2-aqua-diaqua-μ6-oxalato-barium(II)] 2,4,6-trinitrophenolate monohydrate]. Corrigendum
Peng-Zhi Hong,Wen-Dong Song,Zao-He Wu
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807067542
Abstract: In the paper by Hong, Song & Wu [Acta Cryst. (2007), E63, o2296], the scheme shows the wrong structure. The correct scheme is shown below and the compound name is corrected to "poly[[di-μ2-aqua-diaqua-hemi-μ6-oxalato-barium(II)] 2,4,6-trinitrophenolate monohydrate", {[Ba(C2O4)0.5(H2O)4]C6H2N3O7·H2O}n.
Poly[diaqua(μ2-5-carboxypyridine-3-carboxylato-κ2N:O3)hemi(μ2-oxalato-κ4O1,O2:O1′,O2′)(μ4-pyridine-3,5-dicarboxylato-κ4N:O3:O3′:O5)silver(I)terbium(III)]
Hai-Fu Guo,Liang Qin,Xiang-Ying Hao
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809036393
Abstract: In the title coordination polymer, [AgTb(C7H3NO4)(C7H4NO4)(C2O4)0.5(H2O)2]n, the TbIII ion is eight-coordinated by three O atoms from three different pydc (H2pydc = pyridine-3,5-dicarboxylic acid) ligands, one O atom from one Hpydc ligand, two O atoms from one oxalate ligand and two water molecules in a distorted square-antiprismatic geometry. The AgI ion is coordinated in an almost linear fashion by two pyridyl N atoms from one pydc and one Hpydc ligand and has weak interactions with two carboxylate O atoms. The carboxylate groups of pydc and Hpydc ligands link Tb centers, forming a one-dimensional chain. The oxalate adopts a tetradentate bis-chelating coordination mode, connecting the chains into a two-dimensional layer. These layers are further assembled via [Ag(pydc)(Hpydc)] pillars and O—H...O and C—H...O hydrogen bonds into a three-dimensional coordination framework.
Poly[diaqua-μ2-oxalato-di-μ4-terephthalato-diytterbium(III)]  [cached]
Chun-Xiang Wang,Zhi-Feng Li
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536810033052
Abstract: The crystal structure of the title complex, [Yb2(C8H4O4)2(C2O4)(H2O)2]n, features an extended three-dimensional framework made up of Yb3+ ions coordinated by terephthalate ligands, oxalate ligands and water molecules. The Yb3+ ion has a distorted square-antiprismatic coordination formed by one aqua ligand, two O atoms from an oxalate ligand and five O atoms belonging to four terephthalate anions. Two symmetry-independent terephthalate anions, as well as the oxalate anion, occupy special positions on inversion centers. The water molecule participates in O—H...O hydrogen bonding with both terephthalate anions.
Poly[diaqua(μ-oxalato)(μ-2-oxidopyridinium-3-carboxylato)lanthanum(III)]  [cached]
Zhen Hu,Zhi-Bo Zhu
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809018194
Abstract: In the title complex, [La(C6H4NO3)(C2O4)(H2O)2]n, the LaIII ion is coordinated by eight O atoms from two 2-oxidopyridinium-3-carboxylate ligands, two oxalate ligands and two water molecules in a distorted bicapped square-antiprismatic geometry. The carboxylate groups link adjacent LaIII ions, forming two-dimensional layers that are further linked by N—H...O and O—H...O hydrogen bonds.
Poly[diaqua(μ-oxalato)(μ-2-oxidopyridinium-3-carboxylato)praseodymium(III)]  [cached]
Yong-Jun Xu,Xiao-Xi Yang,Hong-Bin Zhao
Acta Crystallographica Section E , 2009, DOI: 10.1107/s160053680900542x
Abstract: In the title complex, [Pr(C6H4NO3)(C2O4)(H2O)2]n, each PrIII ion is coordinated by eight O atoms from two 2-oxynicotinate ligands, two oxalate ligands and two water molecules, displaying a distorted bicapped square-antiprismatic geometry. The carboxylate groups link adjacent praseodymium metal centres, forming layers parallel to the bc plane. The crystal packing is stabilized by intermolecular O—H...O and N—H...O hydrogen bonds.
Poly[diaqua-μ2-oxalato-di-μ4-terephthalato-dilutetium(III)]
Zhi-Feng Li,Chun-Xiang Wang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809034370
Abstract: In the title compound, [Lu2(C8H4O4)2(C2O4)(H2O)2]n, the Lu3+ cations are each coordinated by eight O atoms of four terephthalate anions, one oxalate anion and one aqua ligand to complete a distorted square-antiprismatic geometry. They are bridged by the terephthalate ligands, generating a three-dimensional framework, which is further stabilized by the oxalate ligands. The terephthalate ions and oxalate ions are all located on centers of inversion.
Poly[diaqua-μ2-oxalato-di-μ4-succinato-diyttrium(III)]
Zhi-Feng Li,Chun-Xiang Wang,Ping Wang
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809032085
Abstract: In the title compound, [Y2(C4H4O4)2(C2O4)(H2O)2]n, the flexible succinate anion assumes a gauche conformation and bridges the eight-coordinated Y atoms, generating two-dimensional layers parallel to (010). The coordination polymer layers are linked into a three-dimensional framework by the rigid oxalate ligands. The oxalate ions are located on a center of inversion. Intermolecular O—H...O hydrogen bonds help to stabilize the crystal structure.
Poly[diaqua-μ-oxalato-μ-pyrazine-2-carboxylato-lanthanum(III)]  [cached]
Lu Han,Qun-Hui Meng,Jian-Dong Hao,Yi-Fan Luo
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536808041664
Abstract: In the title complex, [La(C5H3N2O2)(C2O4)(H2O)2]n, the LaIII ion is coordinated by one N and three O atoms from two pyrazine-2-carboxylate ligands, by four O atoms from two oxalate ligands and by two O atoms of two water molecules, displaying a distorted bicapped square-antiprismatic geometry. The carboxylate groups of pyrazine-2-carboxylate and oxalate ligands link the lanthanum metal centres, forming layers parallel to (10overline{1}). The layers are further connected by intermolecular O—H...O and N—H...O hydrogen-bonding interactions, forming a three-dimensional supramolecular network.
Poly[diaqua-μ4-oxalato-di-μ6-phosphato-tetracobalt(II)]
Wen-Yuan Wu,Li-Xin Zhai
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808002912
Abstract: In the structure of the title compound, [Co4(C2O4)(PO4)2(H2O)2]n, there are layers composed of the phosphate anions and two independent CoII cations. These layers are parallel to (001) and are bridged by the oxalate anions that are situated in special positions on centres of symmetry. One independent Co atom has an octahedral coordination, while the second independent Co atom is coordinated in a trigonal–bipyramidal coordination that includes the water molecule. The crystal packing is stabilized by O—H...O hydrogen bonds between the coordinated water molecules and oxalate O atoms.
catena-Poly[[tetra-μ3-isonicotinato-μ3-oxalato-μ2-oxalato-disamarium(III)disilver(I)] dihydrate]  [cached]
Zhao-yang Li,Shan-tang Yue
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536809054208
Abstract: In the title compound, {[AgSm(C6H4NO2)2(C2O4)]·H2O}n, the asymmetric unit contains one SmIII ion, one AgI ion, two unique isonicotinate (ina) ligands, two half oxalate (ox) ligands (one on an inversion centre, the other on a twofold axis) and one uncoordinated water molecule. The central SmIII ion is nine-coordinated by four O-donor atoms from separate bidentate bridging ox ligands and five O-donor atoms from the two ina ligands (both bidentate) and a symmetry-related ina ligand [Sm—O = 2.389 (4)–2.791 (4) ], giving a distorted monocapped square antiprismatic geometry. The AgI ion is three-coordinated in a T-shaped geometry involving two ina N-donor atoms [Ag—N = 2.181 (6) and 2.185 (5) ] and a bridging oxalate O-donor atom [Ag—O = 2.620 (4) ]. The three-dimensional heterometallic Sm—Ag coordination polymer, having a unique (3,4,6)-connected five-nodal net topology, is constructed from two-dimensional samarium–oxalate layers and pillared Ag(ina)2 subunits. Intermolecular water–carboxylate O—H...O hydrogen-bonding interactions are also present.
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