共查询到20条相似文献,搜索用时 15 毫秒
1.
Tetrafluoroaurates(III) of Lanthanides MF[AuF4]2 (M = Tm, Yb, Lu) . Tetrafluoroaurates(III) MF[AuF4]2 with M = Tm, Yb, Lu, all yellow, have been prepared for the first time. From single crystal data they crystallize orthorhombic, space group Pbcn-D (No. 60) with M = Tm: a = 1 102.92(8) pm, b = 904.38(8) pm, c = 2 164.46(23) pm; M = Yb: a = 1 100.98(12) pm, b = 902.23(8) pm, c = 2 157.36(23) pm; M = Lu: a = 1 099.28(18) pm, b = 900.70(15) pm, c = 2 151.50(46) pm. 相似文献
2.
Synthesis and Structure of Tetrafluoroaurates(III) MI[AuF4] with MI = Li, Rb Single crystal investigations on Rb[AuF4], light yellow, confirm the tetragonal unit cell (K[BrF4]-type) with a = 618.2(1) and c = 1191(1) pm, Z = 4, space group I 4/mcm-D (No. 140). Li[AuF4], light yellow too, crystallizes monoclinic with a = 485.32(7), b = 634.29(8), c = 1004.43(13) pm, β = 92.759(12), Z = 4; space group P 2/c-C (No. 13). The structure of Li[AuF4] is related to the Rb[AuF4]-type of structure. 相似文献
3.
Synthesis and Structure of Tetrafluoroaurates(III), TlF2[AuF4], M2F[AuF4]5 (M = Y, La, Bi), Sm[AuF4]3 with an Appendix on Sm[AuF4]2 In the system MF3/AuF3 the structures of several yellow Tetrafluoroaurates(III) have been determinated. TlF2[AuF4] crystallizes tetragonal, space group P41212 – D (Nr. 92) with a = 573.17(4) pm, c = 2780.4(3) pm, Z = 8; M2F[AuF4]5 (M = Bi, La) tetragonal, space group P41212 – D (Nr. 92) with a = 822.89(5) pm, c = 2557.1(3) pm, Z = 4 (Bi); with a = 836.80(3) pm, c = 2602.2(2) pm, Z = 4 (La); Y2F[AuF4]5 monoclin, space group P2/n – C (Nr. 13) with a = 1188.9(3) pm, b = 797.4(2) pm, c = 895.7(3) pm, β = 89.18(3), Z = 4 and Sm[AuF4]3 trigonal, space group R3c – D (Nr. 167) with a = 1034.5(1) pm, c = 1614.1(3) pm, Z = 6. All these yellow crystals have been obtained by solid state reactions in autoclaves or sealed goldtubes. 相似文献
4.
Fluoroplatinates(IV) of the Lanthanides LnF[PtF6] (Ln = Pr, Sm, Gd, Tb, Dy, Ho, Er) For the first time fluorides LnF[PtF6] (Ln = Pr, Sm, Gd, Tb, Dy, Ho, Er), all yellow have been obtained. From single crystal data they crystallize monoclinic, space group P21/n?C (No. 14), Z = 4, Pr: a = 1 125.77(19) pm, b = 559.04(7) pm, c = 910.27(17) pm, β = 107.29(1)°; Sm: a = 1 114.63(31) pm, b = 552.70(12) pm, c = 898.02(20) pm, β = 107.24(2)°; Gd: a = 1 112.12(15) pm, b = 551.22(7) pm, c = 891.99(11) pm, β = 107.09(1)°; Tb (Powder data): a = 1 108.88(20) pm, b = 552.71(9) pm, c = 889.56(16) pm, β = 107.30(1)°; Dy: a = 1 100.28(23) pm, b = 547.77(8) pm, c = 882.41(13) pm, β = 107.32(1); Ho: a = 1 099.11(16) pm, b = 546.16(7) pm, c = 879.45(15) pm, β = 107.34(1)°; Er: a = 1 095.10(16) pm, b = 544.82(10) pm, c = 874.85(14) pm, β = 107.37(1)°. 相似文献
5.
On the Crystal Structure of La[AuF4]3, the Final Link in the Series M[AuF4]3?xFx (x = 0, 0.5 and 1) Yellow La(AuF4)3 was prepared for the first time in form of single crystals and investigated by X-ray methods. It crystallizes in space group R3 c-D (Nr. 167) with a = 1056.2(2) pm, c = 1633.7(8) pm, Z = 6. 相似文献
6.
New ternary phosphides Ln25Ni49P33 (Ln = Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er) have been synthesized by arc melting of pure components. Crystal structure has been determined for Sm25Ni49P33 using X‐ray powder diffraction data and the Rietvelt method: P6m2, a = 22.096(4), c = 3.8734(9) Å, R = 0.096. Crystal structure of Sm25Ni49P33 is of a new type and belongs to large family of ternary compounds with trigonal‐prismatic coordination of the smallest size atoms and metal to nonmetal ratio equal or close to 2 : 1. It is a member of homologous subseries of the compounds with unit cell contents described by general chemical formula R M X . Lattice parameters of the isotypic compounds Ln25Ni49P33 have been refined using X‐ray powder diffraction data. 相似文献
7.
Stephan Schiffler Hanskarl Müller-Buschbaum 《Monatshefte für Chemie / Chemical Monthly》1987,118(6-7):741-747
Five new compounds of the BaNiNd2O5-type with the rare earth elements Sm, Gd, Ho, Er, Tm are prepared and examined by X-ray single crystal technique. The atomic parameters are refined by least-square methods. The crystal chemical differences in the surrounding of rare earth ions in BaMLn
2O5-compounds (M=Pt, Pd, Cu, Ni) are discussed. 相似文献
8.
Synthesis and Structure of Silver(II) Tetrafluoroaurate(III) Ag[AuF4]2 Intensive green single crystals of Ag[AuF4]2 can be obtained by heating up micro crystalline Ag[AuF4]2 in autoclaves (p(F2) ~ 200 bar, T ~ 400°C, t ~ 14 d). It crystallizes monoclinic, space group P21/n ? C; (No. 14) with a = 522.3(1), b = 1101.3(3), c = 550.5(2) pm, β = 94.98(3), Z = 2 and is isotypic with Pd[AuF4]2. 相似文献
9.
The crystal structure of the RE2PbS4 (RE = Y, Dy, Ho, Er and Tm) compounds (space group Cmc21, Pearson symbol oC112, a = 0.79301(3) nm, b = 2.86966(9) nm, c = 1.20511(5) nm, RBragg = 0.0979 for Y2PbS4; a = 0.79484(8) nm, b = 2.8721(3) nm, c = 1.2039(1) nm, for Dy2PbS4; a = 0.79081(2) nm, b = 2.86222(7) nm, c = 1.20220(4) nm, RBragg = 0.0859 for Ho2PbS4; a = 0.7863(2) nm, b = 2.8525(5) nm, c = 1.1995(2) nm, R1 = 0.0482 for Er2PbS4 and a = 0.78419(3) nm, b = 2.84184(9) nm, c = 1.19655(4) nm, RBragg = 0.0893 for Tm2PbS4) was investigated by means of X‐ray single crystal and powder diffraction. Each RE atoms is octahedrally coordinated by six S atoms. Each Pb atoms is surrounded by seven S atoms to form a mono‐capped trigonal prism. 相似文献
10.
Volodymyr Babizhetskyy Chong Zheng Hansjürgen Mattausch Arndt Simon 《Journal of solid state chemistry》2007,180(12):3515-3520
The ternary rare earth boride carbides R2B4C (R=Tb, Dy, Ho, Er) have been synthesized by reacting the elements at temperatures between 1800 and 2000K. The crystal structure of Dy2B4C has been determined from single-crystal X-ray diffraction data. It crystallizes in a new structure type in the orthorhombic space group Immm (a=3.2772(6) Å, b=6.567(2) Å, c=7.542(1) Å, Z=2, R1=0.035 (wR2=0.10) for 224 reflections with Io>2σ(Io)). Boron atoms form infinite chains of fused B6 rings in [100] joined with carbon atoms into planar, two-dimensional networks which alternate with planar sheets of rare earth metal atoms. The electronic structure of Dy2B4C was also analyzed using the tight-binding extended Hückel method. 相似文献
11.
Preparation and Crystal Structure of Tetraphenylphosphonium Hexathiocyanatorhodate(III), [P(C6H5)4]3[Rh(SCN)6] By treatment of RhCl3 · n H2O with KSCN in water a mixture of the linkage isomers [Rh(NCS)n(SCN)6–n]3?, n = 0–2 is formed which is separated by ion exchange chromatography on diethylaminoethyl cellulose. The X-ray structure determination on a single crystal of [P(C6H5)4]3[Rh(SCN)6] (monoclinic, space group C1c1, a = 13.620(5), b = 22.929(13), c = 22.899(9) Å, β = 98.55(3)°, Z = 4) confirms the coordination of all ligands via S with the middle Rh? S distance of 2.372 Å and Rh? S? C angles of 109°. The SCN groups are nearly linear with 175° and averaged bondlengths S? C 1.63 and C? N 1.14 Å. The crystal lattice is build up by layers of complex anions and voluminous cations with no specific interactions but which are closely connected by thiocyanate ligands and phenyl rings. 相似文献
12.
Rare‐Earth‐Metal Coordination Polymers: Syntheses and Crystal Structures of Six New Pimelinates, [M(Pim)(PimH)(H2O)](H2O) (M = Ce, Pr) and [M2(Pim)3(H2O)4] (M = Tb, Ho, Er, Tm) The new rare‐earth metal carboxylates [M(Pim)(PimH)(H2O)](H2O) (M = Ce ( 1 ), Pr ( 2 )) and [M2(Pim)3(H2O)4] (M = Tb ( 3 ), Ho ( 4 ), Er ( 5 ), Tm ( 6 )) were prepared from the reaction of pimelinic acid with CeO2, Pr6O11, Tb4O7, HoCl3, ErCl3 and Tm(NO3)3, respectively. Their crystal structures were determined by single‐crystal X‐ray diffraction. [M(Pim)(PimH)(H2O)](H2O) crystallize in the monoclinic space group P21/n (no. 14) with a = 909.6(1), b = 870.6(1), c = 2240.5(2) pm, β = 92.30(1)°, Z = 4 (crystal data for M = Ce). The isostructural pimelinate‐hydrates [M2(Pim)3(H2O)4] crystallize with orthorhombic symmetry, Pbcn (no. 60), with a = 1392.5(1), b = 902.3(1), c = 2408.8(2) pm, Z = 4 (crystal data for M = Tb). The rare‐earth cations have coordination numbers of 10 ( 1 , 2 ) and 9 ( 3 , 4 , 5 and 6 ), respectively. In the crystal structure of [M(Pim)(PimH)(H2O)](H2O) bidentate and tridentate‐bridging carboxylate groups form rather dense structures in which chains are bridged to layers and further to networks. Pimelinic acid molecules fill the channels. In [M2(Pim)3(H2O)4] tridentate‐bridging carboxylate groups coordinating to two rare‐earth ions lead to dimers that are linked with other dimers to strands. The channels thus formed between the strands are rather small in diameter. They do not contain any non‐coordinated water molecules. 相似文献
13.
Sm2As4O9: An Unusual Samarium(III) Oxoarsenate(III) According to Sm4[As2O5]2[As4O8] Pale yellow single crystals of the new samarium(III) oxoarsenate(III) with the composition Sm4As8O18 were obtained by a typical solid‐state reaction between Sm2O3 and As2O3 using CsCl and SmCl3 as fluxing agents. The compound crystallizes in the triclinic crystal system with the space group (No. 2, Z = 2; a = 681.12(5), b = 757.59(6), c = 953.97(8) pm, α = 96.623(7), β = 103.751(7), γ = 104.400(7)°). The crystal structure of samarium(III) oxoarsenate(III) with the formula type Sm4[As2O5]2[As4O8] (≡ 2 × Sm2As4O9) contains two crystallographically different Sm3+ cations, where (Sm1)3+ is coordinated by eight, but (Sm2)3+ by nine oxygen atoms. Two different discrete oxoarsenate(III) anions are present in the crystal structure, namely [As2O5]4? and [As4O8]4?. The [As2O5]4? anion is built up of two Ψ1‐tetrahedra [AsO3]3? with a common corner, whereas the [As4O8]4? anion consists of four Ψ1‐tetrahedra with ring‐shaped vertex‐connected [AsO3]3? pyramids. Thus at all four crystallographically different As3+ cations stereochemically active non‐binding electron pairs (“lone pairs”) are observed. These “lone pairs” direct towards the center of empty channels running parallel to [010] in the overall structure, where these “empty channels” being formed by the linkage of layers with the ecliptically conformed [As2O5]4? anions and the stair‐like shaped [As4O8]4? rings via common oxygen atoms (O1 – O6, O8 and O9). The oxygen‐atom type O7, however, belongs only to the cyclo‐[As4O8]4? unit as one of the two different corner‐sharing oxygen atoms. 相似文献
14.
Crystal structure and thermal study of the new hydrated cadmium-cerium(III) chloride CeCd4Cl11·13H2O
S. Yahyaoui R.Ben Hassen B. Donadieu A.Ben Salah 《Journal of solid state chemistry》2003,173(2):328-334
The new double-salt CeCd4Cl11·13H2O in the ternary system CeCl3-CdCl2-H2O has been prepared from aqueous solution upon evaporation at 5°C and characterized based on elemental analysis, spectroscopic data, thermal studies and X-ray powder and single-crystal diffraction. CeCd4Cl11·13H2O crystallizes in the monoclinic space group P21 with a=7.667(2), b=17.351(3), c=11.970(2)Å, β=101.61(3)° and Z=2. After refinement of the structure the reliability factor R in the final cycle is 0.064. The structure can be regarded as consisting of endless double chains of CdCl6 and CdOCl5 octahedra and isolated tricapped triangular prisms surrounding the cerium cations. Differential scanning calorimetry showed that the title compound exhibits five endothermic anomalies interpreted from thermogravimetry. A comparison with the structure of SrCd2Cl6·8H2O is proposed. 相似文献
15.
Syntheses and Crystal Structures of the Thiochloroantimonates(III) PPh4[Sb2SCl5] and (PPh4)2[Sb2SCl6]. CH3CN (PPh4)2Sb3Cl11, obtained from Sb2S3, PPh4Cl and HCl, reacts with Na2S4 in acetonitrile forming PPh4[Sb2SCl5]. From this and Na2S4 or from (PPh4)2[Sb2Cl8] and Na2S4 or K2S5 in acetonitrile (PPh4)2[Sb2SCl6] · CH3CN is obtained. Data obtained from the X-ray crystal structure determinations are: PPh4[Sb2SCl5], monoclinic, space group P21/c, a = 1002.9(3), b = 1705.6(5), c = 1653.7(5) pm, β = 99.12(2)°, Z = 4, R = 0.068 for 1283 reflextions; (PPh4)2[Sb2SCl6] · CH3CN, triclinic, space group P1 , a = 1287.8(7), b = 1343.6(9), c = 1696.5(9) pm, α = 69.82(5), β = 85.08(4), γ = 71.54(6)°, Z = 2, R = 0.059 for 6409 reflexions. In every anion two Sb atoms are linked via one sulfur and one ore two chloro atoms, respectively. Paris of [SbSCl5]? ions are associated via Sb …? S and Sb …? Cl contacts forming dimer units. In both compounds every Sb atom has a distorted octahedral coordination when the lone electron pair is included in the counting. 相似文献
16.
The synthesis and crystal structures of three ytterbium(III) complexes of homoazacalixarenes are reported. In all cases, the complexes are obtained without addition of a base, the protons of the complexing phenolic moieties being transferred to the amine groups upon complexation. The 1:1 complex between p-chloro-N-benzylhexahomotriazacalix[3]arene (1) and Yb(NO3)3 is analogous to the neodymium(III) complex reported previously, with the metal ion bound to three phenoxide groups and three nitrate ions. A second 1:1 complex is obtained with Yb(NO3)3 and p-methyl-N-benzyltetrahomodiazacalix[4]arene (2), in which the metal ion is bound to two phenoxide groups only. The replacement of nitrate by triflate counter-ions results in the formation of a 1:2 ‘sandwich’ complex with 1, in which two divergent calixarene molecules are bridged by the metal ion, the counter-ions being non-bonding. 相似文献
17.
Synthesis and Structure of MII[AuF4]2 (MII ? Cd, Hg) Cd[AuF4]2 and the isotypic compound Hg[AuF4]2, both are yellow, crystallize tetragonal in the space-group P4/mcc-D (No. 124) with a = 575.0/575.6 pm, c = 1034.8/1042.3 pm and Z = 2. The single-crystals were obtained by solid-state reactions in goldtubes. 相似文献
18.
Th2F7[AuF4] – the First Fluoroaurate in the System MF4/AuF3 We observed for the first time single crystals of Th2F7[AuF4] [1] in attempts to synthesize ternary fluoroaurates with tetravalent cations. Concerning to X‐Ray‐data (Mo–Kα), the light‐yellow compound crystallizes tetragonal in the space group I4/mcm (No. 140) with a = 1130.6(1) pm, c = 631.34(7) pm and Z = 4. 相似文献
19.
Enkhtsetseg Dashjav Guido Kreiner Frank R. Wagner Walter Schnelle Rüdiger Kniep Prof. Dr. 《无机化学与普通化学杂志》2007,633(9):1349-1358
Four new ternary carbometalates of the general formula RE2[Mo2C3] with RE = Ce, Sm, Tb and Dy have been prepared by a high temperature synthesis route. The Ce, Tb and Dy compounds crystallize isotypic to Er2[Mo2C3], Sm2[Mo2C3], however, is an isotype of Ho2[Cr2C3]. The crystal structures comprise polyanionic layers [(Mo2C3)6?] with the rare‐earth metal ions in between. The layers are constructed by edge and vertex connected MoC4 tetrahedra, which display strong covalent Mo–C bonds. The compounds show metallic behaviour close to the classical limit of 100 μΩ cm for metallic conductors. The magnetic properties are quite different, however they are consistent with the presence of trivalent RE3+ ions with the exception of Ce2[Mo2C3], which contains nonmagnetic Ce species. Electronic structure calculations reveal that the additional electron mainly populates the Ce partial structure. The title compounds extend the series of known carbomolybdates RE2[Mo2C3]. The late lanthanides Gd, Tb, Dy, Ho, Er, Tm, and Lu with comparatively small RE3+ ions and Ce as Ce4+ adopt the Er2[Mo2C3] structure type, whereas the early lanthanides Sm and Pr with larger RE3+ ions crystallize in the structure types of Ho2[Cr2C3] and Pr2[Mo2C3], respectively. 相似文献
20.
Synthesis and Crystal Structures of (PPh4)2[TeS3] · 2 CH3CN and (PPh4)2[Te(S5)2] (PPh4)2[TeS3] · 2 CH3CN was obtained by the reaction of PPh4Cl, Na2S4 and Te in acetonitrile. With sulfur it reacts yielding (PPh4)2[Te(S5)2]. The crystal structures of both products were determined by X-ray diffraction. (PPh4)2[TeS3] · 2 CH3CN: triclinic, space group P1 , Z = 2, R = 0.041 for 4 629 reflexions; it contains trigonal-pyramidal [TeS3]2? ions with an average Te? S bond length of 233 pm. (PPh3)2[Te(S5)2]: monoclinic, P21/n, Z = 2, R = 0.037 for 2 341 reflexions. In the [Te(S5)2]2? ion the tellurium atom has a nearly square coordination by four S atoms. Along with the Te atoms each of the two S5 groups forms a ring with chair conformation. 相似文献