Proton-Stabilized Three-Dimensional Anionic Framework in H[Zn6O2(BO3)3].

ChemInform ◽  
2007 ◽  
Vol 38 (15) ◽  
Author(s):  
Werner Massa ◽  
Olga V. Yakubovich ◽  
Olga V. Dimitrova
Keyword(s):  
Three Dimensional ◽  
Anionic Framework

Structure and Thermoelectric Properties of New Quaternary Tin and Lead Bismuth Selenides, K1+xM4-2xBi7+xSe15 (M = Sn, Pb) and K1+xSn5-xBi11+xSe22

2000 ◽  
Vol 626 ◽  
Author(s):  
Antje Mrotzek ◽  
Kyoung-Shin Choi ◽  
Duck-Young Chung ◽  
Melissa A. Lane ◽  
John R. Ireland ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Single Crystal ◽  
Thermoelectric Properties ◽  
Three Dimensional ◽  
Structure Type ◽  
Narrow Gap ◽  
Low Thermal Conductivity ◽  
Seebeck Coefficients ◽  
Metal Atoms ◽  
Anionic Framework

ABSTRACTWe present the structure and thermoelectric properties of the new quaternary selenides K1+xM4–2xBi7+xSe15 (M = Sn, Pb) and K1-xSn5-xBi11+xSe22. The compounds K1+xM4-2xBi7+xSe15 (M= Sn, Pb) crystallize isostructural to A1+xPb4-2xSb7+xSe15 with A = K, Rb, while K1-xSn5-xBi11+xSe22 reveals a new structure type. In both structure types fragments of the Bi2Te3-type and the NaCl-type are connected to a three-dimensional anionic framework with K+ ions filled tunnels. The two structures vary by the size of the NaCl-type rods and are closely related to β-K2Bi8Se13 and K2.5Bi8.5Se14. The thermoelectric properties of K1+xM4-2xBi7+xSe15 (M = Sn, Pb) and K1-xSn5-xBi11+xSe22 were explored on single crystal and ingot samples. These compounds are narrow gap semiconductors and show n-type behavior with moderate Seebeck coefficients. They have very low thermal conductivity due to an extensive disorder of the metal atoms and possible “rattling” K+ ions.

A new three-dimensional anionic cadmium(II) dicyanamide network

2014 ◽  
Vol 70 (11) ◽  
pp. 1054-1056 ◽  
Author(s):  
Qiang Li ◽  
Hui-Ting Wang
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Unit Cell Volume ◽  
Three Dimensional ◽  
Building Blocks ◽  
The Other ◽  
Dimensional Structure ◽  
Cadmium Nitrate ◽  
Nitrate Tetrahydrate ◽  
Anionic Framework

A new cadmium dicyanamide complex, poly[tetramethylphosphonium [μ-chlorido-di-μ-dicyanamido-κ4N1:N5-cadmium(II)]], [(CH3)4P][Cd(NCNCN)2Cl], was synthesized by the reaction of tetramethylphosphonium chloride, cadmium nitrate tetrahydrate and sodium dicyanamide in aqueous solution. In the crystal structure, each CdIIatom is octahedrally coordinated by four terminal N atoms from four anionic dicyanamide (dca) ligands and by two chloride ligands. The dicyanamide ligands play two different roles in the building up of the structure; one role results in the formation of [Cd(dca)Cl]2building blocks, while the other links the building blocks into a three-dimensional structure. The anionic framework exhibits a solvent-accessible void of 673.8 Å3, amounting to 47.44% of the total unit-cell volume. The cavities in the network are occupied by pairs of tetramethylphosphonium cations.

scholarly journals Structural characterization of quaternary selenites of tungsten(VI), A 2W3SeO12 (A = NH4, Cs, Rb, K or Tl)

2021 ◽  
Vol 77 (4) ◽  
pp. 406-411
Author(s):  
Vineela Balisetty ◽  
Kanamaluru Vidyasagar
Keyword(s):  
Three Dimensional ◽  
Spectroscopic Studies ◽  
Solid State Reactions ◽  
Dimensional Structure ◽  
X Ray Diffraction ◽  
Compound K ◽  
Three Dimensional Structure ◽  
Thermal And Spectroscopic Studies ◽  
Anionic Framework

The quaternary A 2W3SeO12 (A = NH4, Cs, Rb, K or Tl) selenites have been prepared in the form of single crystals by hydrothermal and novel solid-state reactions. They were characterized by X-ray diffraction, thermal and spectroscopic studies. All of them have a hexagonal tungsten oxide (HTO) related [W3SeO12]2− anionic framework with pyramidally coordinated Se4+ ions. The known A 2W3SeO12 (A = NH4, Cs or Rb) compounds are isostructural with the Cs2W3TeO12 compound and have a non-centrosymmetric layered structure containing intra-layer Se—O bonds. The new compound K2W3SeO12(α) is isostructural with the K2W3TeO12 compound and has a centrosymmetric three-dimensional structure containing interlayer Se—O bonds. It is inferred that the new Tl2W3SeO12 compound has the same three-dimensional structure as K2W3SeO12(α).

scholarly journals Synthesis, crystal structure and charge-distribution validation of a new alluaudite-type phosphate, Na2.22Mn0.87In1.68(PO4)3

2020 ◽  
Vol 76 (8) ◽  
pp. 1369-1372
Author(s):  
Abdessalem Badri ◽  
Inmaculada Alvarez-Serrano ◽  
María Luisa López ◽  
Mongi Ben Amara
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Three Dimensional ◽  
Structure Type ◽  
X Ray Diffraction ◽  
Flux Method ◽  
X Ray ◽  
Coordination Numbers ◽  
Dimensional Network ◽  
Anionic Framework

Na2.22Mn0.87In1.68(PO4)3, sodium manganese indium tris(phosphate) (2.22/0.87/1.68), was obtained in the form of single crystals by a flux method and was structurally characterized by single-crystal X-ray diffraction. The compound belongs to the alluaudite structure type (space group C2/c) with general formula X(2)X(1)M(1)M(2)2(PO4)3. The X(2) and X(1) sites are partially occupied by sodium [occupancy 0.7676 (17) and 1/2] while the M(1) and M(2) sites are fully occupied within a mixed distribution of sodium/manganese(II) and manganese(II)/indium, respectively. The three-dimensional anionic framework is built up on the basis of M(2)2O10 dimers that share opposite edges with M(1)O6 octahedra, thus forming infinite chains extending parallel to [10\overline{1}]. The linkage between these chains is ensured by PO4 tetrahedra through common vertices. The three-dimensional network thus constructed delimits two types of hexagonal channels, resulting from the catenation of M(2)2O10 dimers, M(1)O6 octahedra and PO4 tetrahedra through edge- and corner-sharing. The channels are occupied by Na+ cations with coordination numbers of seven and eight.

scholarly journals Synthèse et étude structrale de lyonsite-type (Na0,4,Li0,6)(Fe,Li2)(MoO4)3

2015 ◽  
Vol 71 (6) ◽  
pp. 597-601 ◽  
Author(s):  
Amira Souilem ◽  
Mohamed Faouzi Zid ◽  
Ahmed Driss
Keyword(s):  
Title Compound ◽  
Three Dimensional ◽  
Bond Valence ◽  
Vertex Sharing ◽  
Anionic Framework

The new compound (Na0.4,Li0.6)(Fe,Li2)(MoO4)3was synthesized by cooling from the melt. Its anionic framework is built up from two distinctMO6octahedra, each containing disordered Li+and Fe3+ions in 0.6:0.4 and 0.7:0.3 ratios, and two MoO4tetrahedra, which link by vertex-sharing of their O atoms. These tetrameric units are further linked by sharing edges between octahedra and by formation ofM—O—Mo (M= Fe/Li) bridges, forming ribbons propagating in the [100] direction. The ribbons are cross-linked in both theb- andc-axis directions, giving rise to a three-dimensional framework having [100] tunnels in which the monovalent Na+/Li+cations (0.4:0.6 ratio) lie. Bond-valence calculations are consistent with the disorder model for the cations. The structure of the title compound, which is isotypic with Li3Fe(MoO4)3and Li3Ga(MoO4)3, is compared briefly with those of LiFeMo2O8and Li1.6Mn2.2(MoO4)3.

scholarly journals Crystal structure of poly[bis(ammonium) [bis(μ4-benzene-1,3,5-tricarboxylato)dizincate] 1-methylpyrrolidin-2-one disolvate]

2016 ◽  
Vol 72 (5) ◽  
pp. 764-767 ◽  
Author(s):  
Carlos Ordonez ◽  
Marina S. Fonari ◽  
Qiang Wei ◽  
Tatiana V. Timofeeva
Keyword(s):  
Metal Organic Framework ◽  
Solvent Molecule ◽  
Three Dimensional ◽  
Outer Sphere ◽  
Charge Balance ◽  
Coordination Environment ◽  
Secondary Building Units ◽  
Metal Organic ◽  
Solvent Molecules ◽  
Anionic Framework

The title three-dimensional metal–organic framework (MOF) compound, {(NH4)2[Zn2(C9H3O6)2]·2C5H9NO}n, features an anionic framework constructed from Zn2+cations and benzene-1,3,5-tricarboxylate (BTC) organic anions. Charge balance is achieved by outer sphere ammonium cations formed by degradation of di-n-butylamine in the solvothermal synthesis of the compound. Binuclear {Zn2(COO)2} entities act as the framework's secondary building units. Each ZnIIatom has a tetrahedral coordination environment with an O4set of donor atoms. The three-dimensional framework adopts a rutile-type topology and channels are filled in an alternating fashion with ordered and disordered 1-methylpyrrolidin-2-one solvent molecules and ammonium cations. The latter are held in the channelsviafour N—H...O hydrogen bonds, including three with the benzene-1,3,5-tricarboxylate ligands of the anionic framework and one with a 1-methylpyrrolidin-2-one solvent molecule.

scholarly journals New mixed aluminium–chromium diarsenate

2017 ◽  
Vol 73 (3) ◽  
pp. 345-348 ◽  
Author(s):  
Mohamad Alem Bouhassine ◽  
Habib Boughzala
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Alkali Metal ◽  
Solid State Reaction ◽  
Three Dimensional ◽  
Axis Direction ◽  
Anionic Framework

Potassium chromium aluminium diarsenate, KCr1/4Al3/4As2O7, was prepared by solid-state reaction. The structure consists of (Cr1/4/Al3/4)O6octahedra and As2O7diarsenate groups sharing corners to build up a three-dimensional anionic framework. The potassium cations are located in wide channels running along thec-axis direction. The crystal structure is isostructural with the triclinicAIMIIIX2O7(AI= alkali metal;MIII= Al, Cr, Fe;X= As, P) compounds. However, theMIIIoctahedrally coordinated site is 25% partially occupied by chromium and 75% by aluminium.

Two different anionic manganese(II) coordination polymers constructed through dicyanamide coordination bridges

2015 ◽  
Vol 71 (10) ◽  
pp. 850-855 ◽  
Author(s):  
Hui-Ting Wang
Keyword(s):  
Coordination Polymers ◽  
Layer Structure ◽  
Three Dimensional ◽  
Polymeric Chain ◽  
One Dimensional ◽  
Hydrogen Bonding Interactions ◽  
The One ◽  
Hybrid Coordination ◽  
Metal Coordination Polymers ◽  
Anionic Framework

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), andcatena-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 MnIIcation is octahedrally coordinated by six nitrile N atoms from six anionic dicyanamide (dca) ligands, while the second MnIIcation is coordinated by four nitrile N atoms and two amide N atoms from six anionic dca ligands. Neighbouring MnIIcations 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 MnIIcation is octahedrally coordinated by six nitrile N atoms from six dca ligands. Neighbouring MnIIcations 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.

A linear bridging angle in the pyrovanadate group within the crystal structure of Hg2V2Te2O11

2015 ◽  
Vol 71 (8) ◽  
pp. 712-716 ◽  
Author(s):  
Matthias Weil
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Free Space ◽  
Lone Electron Pair ◽  
Electron Pair ◽  
Three Dimensional ◽  
The Family ◽  
Chain Links ◽  
Anionic Framework

The title compound, dimercury(II) divanadium(V) ditellurium(IV) undecaoxide, Hg2V2Te2O11, is a new representative within the family of divalent oxovanadato(V)tellurates(IV). The anionic framework is made up of disphenoidal [TeO4] polyhedra that are linked by corner-sharing to two neighbouring pyrovanadate units, resulting in chains of six-membered rings propagating parallel to [1\overline{1}0]. The bridging O atom of the pyrovanadate unit is located on an inversion centre, leading to a staggered conformation and a linear V—O—V angle between the two [VO4] tetrahedra. The anionic chains are connected by interjacent six-coordinate Hg2+cations into a three-dimensional framework. The 5s2lone electron pair of the TeIVatom is stereochemically active and protrudes into the free space of the chain links.

scholarly journals Poly[diammonium [diaqua(μ7-benzene-1,2,3,4,5,6-hexacarboxylato)tetraoxidodiuranium(VI)]]

2014 ◽  
Vol 70 (4) ◽  
pp. m142-m143 ◽  
Author(s):  
Paula M. Cantos ◽  
Christopher L. Cahill
Keyword(s):  
Average Distance ◽  
Three Dimensional ◽  
Uranyl Compounds ◽  
Mellitic Acid ◽  
Additional Stabilization ◽  
Uranyl Cation ◽  
Single Water Molecule ◽  
Oxygen Bond ◽  
Anionic Framework ◽  
Good Agreement

Uranyl-carboxylate hybrid materials dominate the catalog of uranyl compounds owing in part to the affinity between COO−functional groups and UO22+. Polycarboxylate organic ligands may present a degree of steric hindrance and could thus influence the resulting uranyl topology. Single crystals of the title compound, {(NH4)2[(UO2)2(C12O12)(H2O)2]}n, were synthesized hydrothermally as a result of reacting uranyl nitrate with benzene-1,2,3,4,5,6-hexacarboxylic acid (mellitic acid). The structure is comprised of a single unique monomeric uranyl cation adopting a pentagonal bipyramidal geometry. The uranyl coordination sphere is composed of four O atoms originating from one half of a fully deprotonated mellitic acid ligand and a single water molecule. The observed axial U—O bonds display an average distance of 1.765 (8) Å, whereas equatorial O atoms are found at an average distance of 2.40 (5) Å. All uranium–oxygen bond lengths are in good agreement with literature values. Furthermore, the coordination between the uranyl pentagonal bipyramids and the mellitic acid anion constructs a three-dimensional anionic framework which is charge-balanced with ammonium cations. Additional stabilization of the structure is provided by O—H...O and N—H...O hydrogen bonding interactions between the components.

Sign in / Sign up

Export Citation Format

Share Document