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1.
Zoya A. Solodovnikova Evgeniya S. Zolotova Sergey F. Solodovnikov 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(1):i6-i8
Two new isotypic triple molybdates, namely tricesium lithium dicobalt tetrakis(tetraoxomolybdate), Cs3LiCo2(MoO4)4, and trirubidium lithium dizinc tetrakis(tetraoxomolybdate), Rb3LiZn2(MoO4)4, crystallize in the non‐centrosymmetric cubic space group I3d and adopt the Cs6Zn5(MoO4)8 structure type. In the parent structure, the Zn positions have 5/6 occupancy, while they are fully occupied by statistically distributed M2+ and Li+ cations in the title compounds. In both structures, all corners of the (M2/3Li1/3)O4 tetrahedra (M = Co and Zn), having point symmetry , are shared with the MoO4 tetrahedra, which lie on threefold axes and share corners with three (M,Li)O4 tetrahedra to form open mixed frameworks. Large alkaline cations occupy distorted cuboctahedral cavities with symmetry. The mixed tetrahedral frameworks in the structures are close to those of mayenite (12CaO·7Al2O3) and the related compounds 11CaO·7Al2O3·CaF2, wadalite (Ca6Al5Si2O16Cl3) and Na6Zn3(AsO4)4·3H2O, but the terminal vertices of the MoO4 tetrahedra are directed in opposite directions along the threefold axes compared with the configurations of Al(Si)O4 or AsO4 tetrahedra. The cation arrangements in Cs3LiCo2(MoO4)4, Rb3LiZn2(MoO4)4 and Cs6Zn5(MoO4)8 repeat the structure of Y3Au3Sb4, being stuffed derivatives of the Th3P4 type. 相似文献
2.
The first hydrothermal synthesis of an Al‐rich alluaudite‐type compound, namely disodium dimanganese aluminium tris(phosphate), which has been obtained at 1073 K and 0.1 GPa starting from the composition Na2Mn2Al(PO4)3, is reported. The crystal structure, which has been refined in the monoclinic C2/c space group, is identical to that of natural alluaudite. The structure consists of kinked chains of edge‐sharing M1 and M2 octahedra, which contain Mn2+ and Al3+ ions. The chains are stacked parallel to {101} and are connected in the b direction by the P1 and P2 tetrahedra. These interconnected chains produce channels parallel to c, which contain the large A1 and A2′ sites occupied by Na+ and Mn2+ ions. 相似文献
3.
Mats Johnsson Helmuth Berger Richard Becker 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(8):i67-i69
Single crystals of tricobalt(II) tellurium(VI) hexaoxide, Co3TeO6, were synthesized via transport reactions using HCl as transporting agent. The compound crystallizes in the monoclinic system (space group C2/c). The Te atoms are positioned in 4b () and 8f positions, while the Co atoms are in 4e (2) and 8f positions. The structure consists of (100) oxygen layers packed in a hhchhc sequence, with TeVI in octahedral coordination and CoII in both octahedral and tetrahedral coordination. The structure contains face‐sharing CoO6 octahedra, as well as edge‐sharing CoO4 tetrahedra. Co3TeO6 is the first oxide that is isostructural with the β‐Li3MF6 family of compounds (M = Al, Cr, Ga, Ti and V). 相似文献
4.
Ying‐Hong Lu Hoong‐Kun Fun Suchada Chantrapromma Ibrahim Abdul Razak Zhen Shen Jing‐Lin Zuo Xiao‐Zeng You 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(8):911-913
The title dinuclear di‐μ‐oxo‐bis[(1,4,8,11‐tetraazacyclotetradecane‐κ4N)manganese(III,IV)] diperchlorate nitrate complex, [Mn2O2(C10H24N4)2](ClO4)2(NO3) or [(cyclam)MnO]2(ClO4)2(NO3), was self‐assembled by the reaction of Mn2+ with 1,4,8,11‐tetraazacyclotetradecane in aqueous media. The structure of this compound consists of a centrosymmetric binuclear [(cyclam)MnO]3+ unit, two perchlorate anions and one nitrate anion. While the low‐temperature electron paramagnetic resonance spectra show a typical 16‐line signal for a di‐μ‐oxo MnIII/MnIV dimer, the magnetic susceptibility studies also confirm a characteristic antiferromagnetic coupling between the electronic spins of the MnIV and MnIII ions. 相似文献
5.
Karl Hensen Alexander Lemke Michael Bolte 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):e565-e566
The reaction of 2‐methylpyridine with TiBr4 affords tetrabromo(2‐methylpyridine‐N)titanate(IV), C6H7Br4NTi. The environment around the Ti atom can be described as a slightly distorted trigonal bipyramid, with the nitrogen base occupying an equatorial position. The crystal structure of the title compound is isomorphous with tetrachloro(2‐methylpyridine‐N)titanate(IV). 相似文献
6.
Ivan V. Ogorodnyk Igor V. Zatovsky Vyacheslav N. Baumer Nikolay S. Slobodyanik Oleg V. Shishkin 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(12):i100-i102
Tetrapotassium cerium(IV) zirconium tetrakis(monophosphate) crystallizes in the tetragonal system (space group I41/amd). A complex disorder in K4CeZr(PO4)4 involves the mixing of Ce and Zr atoms on a single site with m2 symmetry and the splitting of P‐ and O‐atom positions, equivalent to a rotation of the phosphate groups, to yield eight‐ and sixfold coordination environments around Ce and Zr, respectively. The K atoms are located in tunnels running parallel to the a and b axes. 相似文献
7.
Günther J. Redhammer Georg Roth Georg Amthauer 《Acta Crystallographica. Section C, Structural Chemistry》2007,63(4):i21-i24
The structure of copper(I,II) pentachromium(III) germanate, Cu(Cu0.44Cr4.56)Ge2O12, contains one Cu position (m2m), one Ge position (m) and three Cr positions (2/m, m and 2). The close‐packed structure is described in terms of slabs of edge‐sharing Cr3+O6 octahedra and isolated CuO4 and GeO4 tetrahedra. These slabs are aligned parallel to the bc plane and are separated from each other by GeO4 tetrahedra along a. The tetrahedral coordination observed for the Cu+/Cu2+ ions represents an unusual feature of the structure. The Cr—O and Cu—O bond lengths are compared with literature data. 相似文献
8.
Abderrahmen Guesmi Ahmed Driss 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(1):i16-i17
The structure of the hydrothermally synthesized compound AgCo3PO4(HPO4)2, silver tricobalt phosphate bis(hydrogen phosphate), consists of edge‐sharing CoO6 chains linked together by the phosphate groups and hydrogen bonds. The three‐dimensional framework delimits two types of tunnels which accommodate Ag+ cations and OH groups. The title compound is isostructural with the compounds AM3H2(XO4)3 (A = Na or Ag, M = Co or Mn, and X = P or As) of the alluaudite structure type. 相似文献
9.
Frank Schaper Hans‐Herbert Brintzinger 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(3):e78-e78
Bis(tetrahydroborato)[1,1,2,2‐tetramethyl‐1,2‐ethylenebis(η5‐cyclopentadienyl)]zirconium, (I), was synthesized by the reaction of the zirconocene dichloride with lithium tetrahydroborate. Crystals suitable for X‐ray structure analysis were obtained by recrystallization from toluene. The molecule adopts an appproximate C2v symmetry. Both tetrahydroborate ligands are η2‐coordinated and tilted by 18–19° out of the equatorial plane; the angle B1—Zr1—B2 is 104.7°. The cyclopentadienyl rings show a normal η5‐coordinaton, with a centroid–Zr–centroid angle of 124.3°. 相似文献
10.
Carsten Puke Kai Schmengler Kristin Kirschbaum Olaf Conrad Dean M. Giolando 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(12):e542-e542
In the title compound, tetrakis(tetrahydrofuran)lithium(I) tri‐μ‐phenylthiolato‐bis[tris(phenylthiolato)titanate(IV)], [Li(C4H8O)4][Ti2(C6H5S)9], (I), the central structural motif of the [Ti2(SC6H5)9]? anion features a face‐sharing bi‐octahedron. The charge is balanced with a [Li(C4H8O)4]+ cation. The asymmetric unit contains Ti, Li and a heavily disordered tetrahydrofuran molecule on a threefold axis, and two terminal and a bridging thiophenolate moiety and a slightly disordered tetrahydrofuran molecule on general positions. 相似文献
11.
Uwe Kolitsch 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(5):i35-i37
Sodium indium(III) chromate(VI) dihydrate, NaIn(CrO4)2·2H2O, synthesized from an aqueous solution at room temperature, is the first indium(III) member of the large family of compounds with kröhnkite [Na2CuII(SVIO4)2·2H2O]‐type chains. The crystal structure is based on infinite octahedral–tetrahedral [In(CrO4)2(H2O)2]− chains along [010], linked via charge‐balancing Na+ cations. The slightly distorted InO4(H2O)2 octahedra are characterized by a mean In—O distance of 2.125 Å. The CrO4 tetrahedra are strongly distorted (mean Cr—O = 1.641 Å). The Na atom shows an octahedral coordination, unprecedented among compounds with kröhnkite‐type chains. The NaO6 octahedra share opposite edges with the InO4(H2O)2 octahedra to form infinite [001] chains. The hydrogen bonds are of medium strength. NaIn(CrO4)2·2H2O belongs to the structural type F2 in the classification of Fleck, Kolitsch & Hertweck [Z. Kristallogr. (2002), 217 , 435–443], and is isotypic with KAl(CrO4)2·2H2O and MFe(CrO4)2·2H2O (M = K, Tl or NH4). All atoms are in special positions except one O atom. 相似文献
12.
Barbara M. Casari Vratislav Langer 《Acta Crystallographica. Section C, Structural Chemistry》2005,61(12):i117-i119
The structure of dipotassium tetrachromium(VI) tridecaoxide, K2Cr4O13, has been determined from single‐crystal X‐ray data collected at 173 (2) K on a racemically twinned crystal with monoclinic Pc space‐group symmetry. The structure is composed of discrete [Cr4O13]2− zigzag chains held together by the charge‐balancing potassium ions. The conformations adopted by the tetrachromate anion in alkali metal salts and Cr8O21 are different and can be divided into three categories. 相似文献
13.
Paul V. Bernhardt 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(7):744-746
The title pendent‐arm macrocyclic hexaamine ligand binds stereospecifically in a hexadentate manner, and we report here its isomorphous NiII and ZnII complexes (both as perchlorate salts), namely (cis‐6,13‐dimethyl‐1,4,8,11‐tetraazacyclotetradecane‐6,13‐diamine‐κ6N)nickel(II) diperchlorate, [Ni(C12H30N6)](ClO4)2, and (cis‐6,13‐dimethyl‐1,4,8,11‐tetraaza‐cyclotetradecane‐6,13‐diamine‐κ6N)zinc(II) diperchlorate, [Zn(C12H30N6)](ClO4)2. Distortion of the N—M—N valence angles from their ideal octahedral values becomes more pronounced with increasing metal‐ion size and the present results are compared with other structures of this ligand. 相似文献
14.
Bernardo Masci Stefano Saccheo Massimiliano Fonsi Maurizio Varrone Marco Finelli Martine Nierlich Pierre Thury 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(8):978-981
Three methoxy‐ether and one methoxy‐ether/crown‐ether derivatives of p‐tert‐butyltetrahomodioxa‐ and p‐R‐octahomotetraoxacalix[4]arenes (R = methyl, tert‐butyl, H) have been investigated. The first three compounds, 7,15,21,27‐tetra‐tert‐butyl‐29,30,31,32‐tetramethoxy‐3,11‐dioxapentacyclo[23.3.1.15,9.113,17.119,23]ditriaconta‐1(29),5,7,9(30),13,15,‐17(31),19,21,23(32),25,27‐dodecaene, C50H68O6, 33,34,35,36‐tetramethoxy‐7,15,23,31‐tetramethyl‐3,11,19,27‐tetraoxapentacyclo[27.3.1.15,9.113,17.121,25]hexatriaconta‐1(33),5,7,9(34),13,15,17(35),21,23,25(36),29,31‐dodecaene, C40H48O8, and 7,23‐di‐tert‐butyl‐33,34,35,36‐tetramethoxy‐3,11,19,27‐tetraoxapentacyclo[27.3.1.15,9.113,17.121,25]hexatriaconta‐1(33),5,7,9(34),13,15,17(35),‐ 21,23,25(36),29,31‐dodecaene, C44H56O8, in the partial‐cone or 1,2‐alternate conformations, present the common feature of methoxy‐ether self‐inclusion, while the fourth, 42,43‐dimethoxy‐7,15,23,31‐tetramethyl‐3,11,19,27,34,37,40‐heptaoxahexacyclo[15.15.9.15,9.121,25.013,41.029,33]tritetraconta‐5(42),6,8,13(41),14,16,21(43),22,24,29(33),30,32‐dodecaene, C42H50O9, adopts the 1,3‐alternate conformation owing to the presence of a 1,3‐polyether chain. 相似文献
15.
Ritu Bala Raj Pal Sharma Upendra Sharma Valeria Ferretti 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(12):m628-m631
In the title complex salt, tetrakis[hexaamminecobalt(III)] hexachlorocadmate(II) bis[aquatetrachlorothiocyanatocadmate(II)] dichloride dihydrate, the discrete ions, i.e. [Co(NH3)6]3+, Cl−, [CdCl6]4− (located on an inversion centre) and [CdCl4(SCN)(H2O)]3−, together with cocrystallized water molecules, are assembled by means of a network of hydrogen‐bonding interactions. This is the first X‐ray structure determination of a hexaamminecobalt(III) salt with two different complex chlorocadmium anions. 相似文献
16.
Susanne Mossin Henning Osholm Srensen Hgni Weihe 《Acta Crystallographica. Section C, Structural Chemistry》2002,58(4):m204-m206
The crystal structure of the low‐spin (S = 1) MnIII complex [Mn(CN)2(C10H24N4)]ClO4, or trans‐[Mn(CN)2(cyclam)](ClO4) (cyclam is the tetradentate amine ligand 1,4,8,11‐tetraazacyclotetradecane), is reported. The structural parameters in the Mn(cyclam) moiety are found to be insensitive to both the spin and the oxidation state of the Mn ion. The difference between high‐ and low‐spin MnIII complexes is that a pronounced tetragonal elongation of the coordination octahedron occurs in high‐spin complexes and a slight tetragonal compression is seen in low‐spin complexes, as in the title complex. 相似文献
17.
Ana María Atria Ricardo Baggio María Teresa Garland Piedad Corts 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(7):m311-m314
The three title compounds, namely 4‐phenyl‐1H‐imidazolium hexa‐μ2‐chloro‐chloro‐μ4‐oxo‐tris(4‐phenyl‐1H‐imidazole‐κN1)tetracopper(II) monohydrate, (C9H9N2)[Cu4Cl7O(C9H8N2)3]·H2O, hexa‐μ2‐chloro‐μ4‐oxo‐tetrakis(pyridine N‐oxide‐κO)tetracopper(II), [Cu4Cl6O(C5H5NO)4], and hexa‐μ2‐chloro‐tetrakis(2‐methyl‐1H‐imidazole‐κN1)‐μ4‐oxo‐tetracopper(II) methanol trisolvate, [Cu4Cl6O(C4H6N2)4]·3CH4O, exhibit the same Cu4OCl6 framework, where the O atom at the centre of an almost regular tetrahedron bridges four copper cations at the corners. This group is in turn surrounded by a Cl6 octahedron, leading to a rather globular species. This special arrangement of the CuII cations results in a diversity of magnetic behaviours. 相似文献
18.
Alexander A. Tsirlin Evgeny V. Dikarev Evgeny V. Antipov Roman V. Shpanchenko 《Acta Crystallographica. Section C, Structural Chemistry》2006,62(2):i13-i15
Single crystals of a new complex phosphate, calcium sodium vanadium phosphate, Ca8.42Na1.16V(PO4)7, have been grown from a melt under an inert atmosphere. The crystal structure has rhombohedral (R3c) symmetry and belongs to the whitlockite structure type. Vanadium(III) ions occupy nearly regular octahedral sites (M5 with 3 point symmetry), which share corners with six PO4 tetrahedra to form isolated units. The calcium ions occupy eight‐ and nine‐coordinated sites. The sodium ions partially occupy one octahedral position and share one nine‐coordinated position with a Ca atom. 相似文献
19.
Nicholas C. Norman A. Guy Orpen Michael J. Quayle Edward G. Robins 《Acta Crystallographica. Section C, Structural Chemistry》2000,56(1):50-52
The structure of trans‐(bromo/chloro)hydridotetrakis(tri‐methylphosphine)rhodium(III) bis(tetrabromopyrocatechol‐ato‐O,O′)borate dichloromethane solvate, [RhCl0·74Br0·26H‐(C3H9P)4](C12BBr8O4)·CH2Cl2, is reported. The RhIII complex shows bromine/chlorine compositional disorder with a trans arrangement of the hydride and halide ligands. The anion has approximate D2d symmetry, with a central spiro‐B atom distorted from regular tetrahedral geometry by the small chelating O—B—O angles. 相似文献
20.
Robert J. Baker Helga Bettentrup Cameron Jones 《Acta Crystallographica. Section C, Structural Chemistry》2003,59(9):m339-m341
Tetra‐tert‐butyltetraphosphacubane, P4C4tBu4, reacts with water in the presence of `GaI' to yield two products, namely 4,6,7,8‐tetra‐tert‐butyl‐1,2,3‐triphospha‐5‐phosphoniatetracyclo[3.2.1.02,4.03,8]oct‐6‐ene tetraiodogallate(III), (C20H37P4)[GaI4], and triiodo(3,5,7,8‐tetra‐tert‐butyl‐1,2,4λ5,6‐tetraphosphatetracyclo[4.1.1.02,5.07,8]octan‐4‐one)gallium(III), [GaI3(C20H38OP4)], both of which have been structurally characterized. The X‐ray crystal structure determination of the former compound shows it to be an ion‐separated salt, while the latter compound is a neutral phosphinite complex of GaI3. 相似文献