共查询到20条相似文献,搜索用时 375 毫秒
1.
Farida Hamchaoui Vronique Alonzo Houria Rebbah Eric Le Fur 《Acta Crystallographica. Section C, Structural Chemistry》2014,70(4):351-354
The title compound, hexapotassium octairon(II,III) dodecaphosphonate, exhibiting a two‐dimensional structure, is a new mixed alkali/3d metal phosphite. It crystallizes in the space group Rm, with two crystallographically independent Fe atoms occupying sites of m (Fe1) and 3m (Fe2) symmetry. The Fe2 site is fully occupied, whereas the Fe1 site presents an occupancy factor of 0.757 (3). The three independent O atoms, one of which is disordered, are situated on a mirror and all other atoms are located on special positions with 3m symmetry. Layers of formula [Fe3(HPO3)4]2− are observed in the structure, formed by linear Fe3O12 trimer units, which contain face‐sharing FeO6 octahedra interconnected by (HPO3)2− phosphite oxoanions. The partial occupancy of the Fe1 site might be described by the formation of two [Fe(HPO3)2]− layers derived from the [Fe3(HPO3)4]2− layer when the Fe1 atom is absent. Fe2+ is localized at the Fe1 and Fe2 sites of the [Fe3(HPO3)4]2− sheets, whereas Fe3+ is found at the Fe2 sites of the [Fe(HPO3)2]− sheets, according to bond‐valence calculations. The K+ cations are located in the interlayer spaces, between the [Fe3(HPO3)4]2− layers, and between the [Fe3(HPO3)4]2− and [Fe(HPO3)2]− layers. 相似文献
2.
Khaoulani Idrissi Abdallah Saadi Mohamed Rafiq Mohamed Guelzim Abdelhalim 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(6):i43-i45
The structure of the title compound, (NH4)2[Mg(H2O)6]3(HPO3)4, consists of [Mg(H2O)6]2+ and (NH4)+ cations and (HPO3)2− anions held together by an intricate network of hydrogen bonds involving all H atoms except for one linked directly to a P atom. The Mg2+ cations are octahedrally coordinated by six water molecules. One of the Mg atoms is located on a site with 2/m symmetry, whereas the other Mg atom and the P and N atoms occupy sites with m symmetry. 相似文献
3.
Matthias Weil Stefan O. Baumann Dietrich K. Breitinger 《Acta Crystallographica. Section C, Structural Chemistry》2010,66(10):i89-i91
The characteristic feature of the structure of the title compound, dipotassium bis(sulfito‐κS)mercurate(II) 2.25‐hydrate, is a layered arrangement parallel to (001) where each of the two independent [Hg(SO3)2]2− anions are grouped into centrosymmetric pairs and are surrounded by two K+ cations to give the overall layer composition {K2[Hg(SO3)2]2}2−. The remaining cations and the uncoordinated water molecules are situated between these layers. Within the [Hg(SO3)2]2− anions, the central Hg atoms are twofold coordinated by S atoms, with a mean Hg—S bond length of 2.384 (2) Å. The anions are slightly bent [174.26 (3) and 176.99 (3)°] due to intermolecular O...Hg interactions greater than 2.8 Å. All coordination polyhedra around the K+ cations are considerably distorted, with coordination numbers ranging from six to nine. Although the H atoms of the five water molecules (one with symmetry 2) could not be located, O...O separations between 2.80 and 2.95 Å suggest a system of medium to weak O—H...O hydrogen bonds which help to consolidate the structural set‐up. Differences and similarities between the bis(sulfito‐κS)mercurate(II) anions in the title compound and those in the related salts (NH4)2[Hg(SO3)2] and Na2[Hg(SO3)2]·H2O are discussed. 相似文献
4.
Tamara ordevi Ljiljana Karanovi 《Acta Crystallographica. Section C, Structural Chemistry》2013,69(2):114-118
The new layered title compound, barium di‐μ‐hydroxido‐di‐μ‐vanadato‐tricobaltate(II), was prepared under low‐temperature hydrothermal conditions. Its crystal structure comprises Co2+ and O2− ions in the Kagomé geometry. The octahedral Co3O6(OH)2 Kagomé layers, made up of edge‐shared CoO4(OH)2 octahedra with Co on a site of 2/m symmetry, alternate along the c axis with barium vanadate heteropolyhedral layers, in which Ba is on a site of m symmetry and V is on a site of 3m symmetry. All three O atoms and the H atom also occupy special positions: two O atoms and the H atom are on sites with 3m symmetry and one O atom is on a site with m symmetry. Ba[Co3(VO4)2(OH)2] represents the first compound from the four‐component BaO–CoO–V2O5–H2O system and its structure is topologically related to the minerals vesignieite, Ba[Cu3(VO4)2(OH)2], and bayldonite, Pb[Cu3(AsO4)2(OH)2]. 相似文献
5.
Riadh Marzouki Abderrahmen Guesmi Ahmed Driss 《Acta Crystallographica. Section C, Structural Chemistry》2010,66(10):i95-i98
The title compound, tetrasodium cobalt aluminium hexaarsenate, Na4Co7−xAl2/3x(AsO4)6 (x = 1.37), is isostructural with K4Ni7(AsO4)6; however, in its crystal structure, some of the Co2+ ions are substituted by Al3+ in a fully occupied octahedral site (site symmetry 2/m) and a partially occupied tetrahedral site (site symmetry 2). A third octahedral site is fully occupied by Co2+ ions only. One of the two independent tetrahedral As atoms and two of its attached O atoms reside on a mirror plane, as do two of the three independent Na+ cations, all of which are present at half‐occupancy. The proposed structural model based on a careful investigation of the crystal data is supported by charge‐distribution (CHARDI) analysis and bond‐valence‐sum (BVS) calculations. The correlation between the X‐ray refinement and the validation results is discussed. 相似文献
6.
Ricardo Baggio Mireille Perec Maria Teresa Garland 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(5):m175-m177
A polymeric heterometallic compound, {[Gd2Zn3(C4H4O5)6(H2O)6]·12H2O}n, comprising zinc(II) and gadolinium(III) cations bridged by carboxylate groups from oxydiacetate ligands, is presented. The GdIII cations lie at sites with crystallographic 32 symmetry and display a tricapped trigonal‐prism arrangement, which is defined by six carboxyl and three ether O atoms. The ZnII cations lie at sites with imposed 2/m symmetry and are octahedrally coordinated by four carboxyl O atoms and two apical water ligands, which form strong intramolecular hydrogen bonds. Comparison is made with the previously reported isostructural homologous copper–gadolinium complex. 相似文献
7.
Andreas Lemmerer David G. Billing Sandra A. Reisinger 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(3):m97-m100
The three isostructural compounds butylammonium hexachloridotin(IV), pentylammonium hexachloridotin(IV) and hexylammonium hexachloridotin(IV), (CnH2n+1NH3)2[SnCl6], with n = 4, 5 and 6, respectively, crystallize as inorganic–organic hybrids. As such, the structures consist of layers of [SnCl6]2− octahedra, separated by hydrocarbon layers of interdigitated butylammonium, pentylammonium or hexylammonium cations. Corrugated layers of cations alternate with tin(IV) chloride layers. The asymmetric unit in each compound consists of an anionic component comprising one Sn and two Cl atoms on a mirror plane, and two Cl atoms in general positions; the two cations lie on another mirror plane. Application of the mirror symmetry generates octahedral coordination around the Sn atom. All compounds exhibit bifurcated and simple hydrogen‐bonding interactions between the ammonium groups and the Cl atoms, with little variation in the hydrogen‐bonding geometries. 相似文献
8.
Two new cobalt phosphites, (H3NC6H4NH3)Co(HPO3)2 (1) and (NH4)2Co2(HPO3)3 (2), have been synthesized and characterized by single-crystal X-ray diffraction. All the cobalt atoms of 1 are in tetrahedral CoO4 coordination. The structure of 1 comprises twisted square chains of four-rings, which contain alternating vertex-shared CoO4 tetrahedra and HPO3 groups. These chains are interlinked with trans-1,4-diaminocyclohexane cations by hydrogen bonds. The 2-D structure of 2 comprises anionic complex sheets with ammonium cations present between them. An anionic complex sheet contains three-deck phosphite units, which are interconnected by Co2O9 to form complex layers. Magnetic susceptibility measurements of 1 and 2 showed that they have a weak antiferromagnetic interaction. 相似文献
9.
Ryo Sekiya Kazumasa Hosoya Shin‐ichi Nishikiori 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(5):i32-i34
The title compound, poly[diamminehexa‐μ‐cyano‐dicopper(I)copper(II)mercury(II)], [Cu3Hg(CN)6(NH3)2]n, has a novel threefold‐interpenetrating structure of three‐dimensional frameworks. This three‐dimensional framework consists of two‐dimensional network Cu3(CN)4(NH3)2 complexes and rod‐like Hg(CN)2 complexes. The two‐dimensional network complex contains trigonal–planar CuI (site symmetry m) and octahedral CuII (site symmetry 2/m) in a 2:1 ratio. Two types of cyanide group form bridges between three coordination sites of CuI and two equatorial sites of CuII to form a two‐dimensional structure with large hexagonal windows. One type of CN− group is disordered across a center of inversion, while the other resides on the mirror plane. Two NH3 molecules (site symmetry 2) are located in the hexagonal windows and coordinate to the remaining equatorial sites of CuII. Both N atoms of the rod‐like Hg(CN)2 group (Hg site symmetry 2/m and CN− site symmetry m) coordinate to the axial sites of CuII. This linkage completes the three‐dimensional framework and penetrates two hexagonal windows of two two‐dimensional network complexes to form the threefold‐interpenetrating structure. 相似文献
10.
Padmini Ramaswamy Sukhendu Mandal Srinivasan Natarajan 《Journal of solid state chemistry》2009,182(9):2491-2496
A novel manganese phosphite-oxalate, [C2N2H10][Mn2II(OH2)2(HPO3)2(C2O4)] has been hydothermally synthesized and its structure determined by single-crystal X-ray diffraction. The structure consists of neutral manganese phosphite layers, [Mn(HPO3)]∞, formed by MnO6 octahedra and HPO3 units, cross-linked by the oxalate moieties. The organic cations occupy the middle of the 8-membered one-dimensional channels. Magnetic studies indicate weak antiferromagnetic interactions between the Mn2+ ions. 相似文献
11.
Feng Geng Guo‐Hua Han Bi‐Zhou Lin 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(8):m355-m357
The crystal structure of the title compound, (C4H15N3)2[Mo5O15(HPO4)2]·4H2O, is made up of [Mo5O15(HPO4)2]4− clusters, iminodiethylenediammonium cations and solvent water molecules. The [Mo5O15(HPO4)2]4− cluster, with approximate C2 symmetry, can be considered as a ring formed by five distorted edge‐ and corner‐sharing MoO6 octahedra, capped on both poles by a hydrophosphate tetrahedron. There exist N—H⋯O, O—H⋯N and C—H⋯O hydrogen bonds between the organic ammonium groups and the clusters, with interatomic N⋯O distances ranging from 2.675 (3) to 2.999 (3) Å, and C⋯O distances ranging from 3.139 (5) to 3.460 (5) Å. 相似文献
12.
Jing‐Mei Xiao 《Acta Crystallographica. Section C, Structural Chemistry》2010,66(11):m348-m350
The title compound, {(C7H15N2Cl)2[Cd3Cl10]·4H2O}n, consists of 1‐chloromethyl‐1,4‐diazoniabicyclo[2.2.2]octane dications, one‐dimensional inorganic chains of {[Cd3Cl10]4−} anions and uncoordinated water molecules. Each of the two independent CdII ions, one with site symmetry 2/m and the other with site symmetry m, is octahedrally coordinated by chloride ions (two with site symmetry m and one with site symmetry 2), giving rise to novel polymeric zigzag chains of corner‐sharing Cd‐centred octahedra parallel to the c axis. The organic cations, bisected by mirror planes that contain the two N atoms, three methylene C atoms and the Cl atom, are ordered. Hydrogen bonds (O—H...Cl and O—H...O) between the water molecules (both with O atoms in a mirror plane) and the chloride anions of neighbouring chloridocadmate chains form a three‐dimensional supramolecular network. 相似文献
13.
Alexander I. Gubanov Natalia V. Kuratieva 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(10):i83-i85
The structures of orthorhombic bis[pentaammineaquacobalt(III)] tetra‐μ2‐fluorido‐tetradecafluoridotrizirconium(IV) hexahydrate (space group Ibam), [Co(NH3)5(H2O)]2[Zr3F18]·6H2O, (I), and bis[hexaamminecobalt(III)] tetra‐μ2‐fluorido‐tetradecafluoridotrizirconium(IV) hexahydrate (space group Pnna), [Co(NH3)6]2[Zr3F18]·6H2O, (II), consist of complex [Co(NH3)x(H2O)y]3+ cations with either m [in (I)] or and 2 [in (II)] symmetry, [Zr3F18]6− anionic chains located on sites with 222 [in (I)] or 2 [in (II)] symmetry, and water molecules. 相似文献
14.
Xiao‐Hong Wen R.‐K. Li C.‐T. Chen 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(3):i21-i23
Single crystals of a new rubdidium beryllium borate, RbBe4(BO3)3, have been obtained by spontaneous nucleation from a high‐temperature melt. This new orthorhombic (Pnma) structure type contains [Be2BO4]− rings, made of two BeO4 tetrahedra and one BO3 triangle, which constitute the basic structural units. The m plane runs through the B and one of the O atoms and intersects the ring. These rings form chains in the a direction, which are connected in the b and c directions to form zeolite‐type cages in which the Rb+ cations are located, at sites of m symmetry. 相似文献
15.
Cong Ding Guo‐Hua Han Bi‐Zhou Lin Ling Bai 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(6):m256-m258
The crystal structure of the title compound, {(C3H12N2)[Mo3O10]·2H2O}n, is composed of [Mo3O10]2− anionic chains, propane‐1,3‐diammonium cations and solvent water molecules. The [Mo3O10]2− chain is constructed from edge‐sharing MoO6 octahedra. The protonated propane‐1,3‐diamine cations and solvent water molecules are located between the chains and are linked to the O atoms of the inorganic chains by hydrogen bonds. 相似文献
16.
Guo‐Hua Han Bi‐Zhou Lin Zhen Li 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(6):m313-m314
The crystal structure of the title compound, [Zn(C2H8N2)3][MoO4], is composed of [MoO4]2− anions and [Zn(en)3]2+ complex cations (en is ethylenediamine), both with symmetry 2, which are held together in a three‐dimensional network via hydrogen‐bonding interactions. The [Zn(en)3]2+ cations in the crystal structure exhibit two configurations, viz. Λ(δδδ) and Δ(λλλ), as a pair of enantiomers. 相似文献
17.
Xiao‐Hui Huang 《Acta Crystallographica. Section C, Structural Chemistry》2013,69(5):483-485
The solvothermal reaction of MnCl2·H2O and 5‐methoxybenzene‐1,3‐dicarboxylic acid (MeO‐m‐H2BDC) led to a three‐dimensional MnII metal–organic framework, namely poly[(dimethylformamide‐κO)(μ4‐5‐methoxybenzene‐1,3‐dicarboxylato‐κ4O1:O1′:O3,O3′:O3)manganese(II)], [Mn(C9H6O5)(C3H7NO)]n or [Mn(MeO‐m‐BDC)(DMF)]n (DMF is dimethylformamide). The MnII atom is six‐coordinated and exhibits a distorted octahedral geometry formed by five carboxylate O atoms from four different MeO‐m‐BDC2− anionic ligands and by one DMF O atom. The three‐dimensional framework of (I) formed by the bridging MeO‐m‐BDC2− ligands and the MnII atoms exhibits a pts topological network when MeO‐m‐BDC2− and MnII are viewed as four‐connected nodes. 相似文献
18.
Ming‐Xue Li Su‐Zhi Li 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(11):m525-m526
The title novel manganese(II) coordination polymer, {(C10H10N2)[MnCl4]}n, consists of a one‐dimensional infinite zigzag chain composed of polymeric [MnCl4]2− units in which each Mn2+ ion is located on a twofold rotation axis and is coordinated to two terminal Cl atoms and four bridging chloro ligands. Adjacent Mn2+ ions are linked by double Cl bridges arranged about a centre of inversion, thus forming anionic chains of distorted edge‐sharing octahedra. Rows of approximately parallel 4,4′‐bipyridinium cations run side‐by‐side with the MnCl4 chains. A two‐dimensional layer structure is constructed via hydrogen bonds and by additional π–π stacking interactions. 相似文献
19.
Fang Liu Jing‐Jing Zhang Ming‐Yuan Lei Qing‐Fu Zhang 《Acta Crystallographica. Section C, Structural Chemistry》2015,71(9):834-838
The title CdII compound, {[Cd2(C13H7NO4)2(H2O)4]·5H2O}n, was synthesized by the hydrothermal reaction of Cd(NO3)2·4H2O and 5‐(pyridin‐4‐yl)isophthalic acid (H2L). The asymmetric unit contains two crystallographically independent CdII cations, two deprotonated L2− ligands, four coordinated water molecules and five isolated water molecules. One of the CdII cations adopts a six‐coordinate octahedral coordination geometry involving three O atoms from one bidentate chelating and one monodentate carboxylate group of two different L2− ligands, one N atom of another L2− ligand and two coordinated water molecules. The second CdII cation adopts a seven‐coordinate pentagonal–bipyramidal coordination geometry involving four O atoms from two bidentate chelating carboxylate groups of two different L2− ligands, one N atom of another L2− ligand and two coordinated water molecules. Each L2− ligand bridges three CdII cations and, likewise, each CdII cation connects to three L2− ligands, giving rise to a two‐dimensional graphite‐like 63 layer structure. These two‐dimensional layers are further linked by O—H...O hydrogen‐bonding interactions to form a three‐dimensional supramolecular architecture. The photoluminescence properties of the title compound were also investigated. 相似文献
20.
Hui‐Ting Wang 《Acta Crystallographica. Section C, Structural Chemistry》2015,71(10):850-855
In order to explore new metal coordination polymers and to search for new types of ferroelectrics among hybrid coordination polymers, two manganese dicyanamide complexes, poly[tetramethylammonium [di‐μ3‐dicyanamido‐κ6N1:N3:N5‐tri‐μ2‐dicyanamido‐κ6N1:N5‐dimanganese(II)]], {[(CH3)4N][Mn2(NCNCN)5]}n, (I), and catena‐poly[bis(butyltriphenylphosphonium) [[(dicyanamido‐κN1)manganese(II)]‐di‐μ2‐dicyanamido‐κ4N1:N5]], {[(C4H9)(C6H5)3P]2[Mn(NCNCN)4]}n, (II), were synthesized in aqueous solution. In (I), one MnII cation is octahedrally coordinated by six nitrile N atoms from six anionic dicyanamide (dca) ligands, while the second MnII cation is coordinated by four nitrile N atoms and two amide N atoms from six anionic dca ligands. Neighbouring MnII cations are linked together by μ‐1,5‐ and μ‐1,3,5‐bridging dca anions to form a three‐dimensional polymeric structure. The anionic framework exhibits a solvent‐accessible void of 289.8 Å3, amounting to 28.0% of the total unit‐cell volume. Each of the cavities in the network is occupied by only one tetramethylammonium cation. In (II), each MnII cation is octahedrally coordinated by six nitrile N atoms from six dca ligands. Neighbouring MnII cations are linked together by double dca bridges to form a one‐dimensional polymeric chain, and C—H...N hydrogen‐bonding interactions are involved in the formation of the one‐dimensional layer structure. 相似文献