首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 46 毫秒
1.
Disilver Oxotellurate(VI), Ag2TeO4 Ag2TeO4 was synthesised by reaction of Ag2O and TeO2 applying an elevated oxygen pressure. According to a single crystal structure determination (C2/c, a = 9.0588(9), b = 9.2456(8), c = 13.623(1) Å, β = 91.758(8)°, Z = 12, 1289 independent reflections, R1 = 2.32 %, wR2 = 5.51 %), Ag2TeO4 contains a novel chain‐like polyanion with tellurium in an octahedral coordination. The TeO6 octahedra are connected via common edges and vertices in a way that the resulting polyanion represents a section of the rutile structure type. Ag2TeO4 shows diamagnetic and insulating behaviour, it decomposes at 560 °C into Ag2TeO3 and oxygen.  相似文献   

2.
Synthesis and Crystal Structure of Te3O3(PO4)2, a Compound with 5‐fold Coordinate Tellurium(IV) Polycrystalline Te3O3(PO4)2 is formed during controlled dehydration of (Te2O3)(HPO4) with (Te8O10)(PO4)4 as an intermediate product. Colourless single crystals were prepared by heating stoichiometric amounts of the binary oxides P2O5 und TeO2 in closed silica glass ampoules at 590 °C for 8 hours. The crystal structure (P21/c, Z = 4, α = 12.375(2), b = 7.317(1), c = 9.834(1)Å, β = 98.04(1)°, 1939 structure factors, 146 parameters, R[F2 > 2σ(F2)] = 0.0187, wR2(F2 all) = 0.0367) was determined from four‐circle diffractometer data and consists of [TeO5] polyhedra und PO4 tetrahedra as the main building units. The framework structure is made up of cationic zigzag‐chains of composition [Te2O3]2+ which extend parallel to [001] and anionic [Te(PO4)2]2— units linked laterally to these chains. This leads to the formation of [Te2O3][Te(PO4)2] layers parallel to the bc plane which are interconnected via weak Te‐O bonds.  相似文献   

3.
From solid state reactions of Ag2O, HgO, and Sb2O3 at high temperatures under elevated oxygen pressures a new silver mercury antimonate, Ag5HgSbO6, has been obtained. According to a single crystal structure determination Ag5HgSbO6 crystallizes in space group P$\bar{3}$ 1c (no. 163) with a = 5.9263(4), c = 12.3023(7) Å, V = 374.18(4) Å3, Z = 2, 498 independent reflections, R1 = 0.030, wR2 = 0.059 (I ≥ 2 σ (I). Ag5HgSbO6 consists of HgSbO6 layers, analogous to BiI3, which are separated by Kagome nets formed by Ag+ ions. Perpendicular to these layers and along the c axis linear strings of Ag+ ions run through the large voids of the layers. Accordingly, Ag5HgSbO6 adopts the Ag5Pb2O6 type of structure where the lead positions are occupied by mercury and antimony alternatingly. The finding of mercury in octahedral coordination, particularly besides the lower charged Ag+ cations in linear coordination, which is also highly preferred by Hg2+ ions, is rather unexpected. Ag5HgSbO6 starts to decompose at 450 °C and, in contrast to subvalent and metallic Ag5Pb2O6, the new compound is charge balanced and semiconducting (ρ = 5.7 Ωcm at ambient temperature, Ea = 0.047 eV).  相似文献   

4.
Two modifications of (TeO)(HAsO4) were obtained by reacting tellurium dioxide with arsenic acid under boiling conditions (modification I, acid concentration 80 wt‐%) or under hydrothermal conditions (modification II, acid concentration 50 wt‐%). The crystal structures of the two modifications were determined from single‐crystal X‐ray data [modification I: P21/c, Z = 4, a = 7.4076(10), b = 5.9596(7), c = 9.5523(11) Å, β = 102.589(8)°, 2893 structure factors, 68 parameters, R[F2 > 2σ(F2)] = 0.0247, wR2(F2 all) = 0.0530; modification II: P21/c, Z = 4, a = 6.2962(4), b = 4.7041(3), c = 13.9446(8) Å, β = 94.528(3)°, 2549 structure factors, 69 parameters, R[F2 > 2σ(F2)] = 0.0207, wR2(F2 all) = 0.0462)]. Dehydration of (TeO)(HAsO4)‐II at temperatures above 260 °C results in the formation of polycrystalline (Te3O3)(AsO4)2. Single crystals of the anhydrous product were grown either by heating stoichiometric amounts of the binary oxides TeO2 and As2O5 in closed silica glass ampoules or with higher concentrated arsenic acid (80 wt‐%) under hydrothermal conditions at 220 °C. The common features in the crystal structures of (Te3O3)(AsO4)2 [P$\bar{1}$ , Z = 4, a = 6.5548(4), b = 7.6281(6), c = 15.0464(15) Å, α = 140.212(6), β = 102.418(9)°, γ = 77.346(5)°, 5718 structure factors, 146 parameters, R[F2 > 2σ(F2)] = 0.0351, wR2(F2 all) = 0. 1093] and in that of the two modifications of acidic (TeO)(HAsO4) are [TeO5] square‐pyramids and [AsO4] tetrahedra. In anhydrous (Te3O3)(AsO4)2 and in (TeO)(HAsO4)‐II, a layered arrangement of the building units is found, whereas in the (TeO)(HAsO4)‐I structure strands are formed. Different hydrogen bonding interactions are present in the two modifications of (TeO)(HAsO4).  相似文献   

5.
Deep blue‐violet colored powder samples of Ag2ZnZr2F14 were synthesized by heating Zn(NO3)2·4H2O, Ag and ZrOCl2·8H2O at 300 °C under fluorine atmosphere. The crystal structure of Ag2ZnZr2F14 was refined from X‐ray powder diffraction data using the Rietveld method (C2/m, a = 9.0206(1) Å, b = 6.6373(1) Å, c = 9.0563(1) Å, β = 90.44(1)°, Z = 2). The structure is derived from the isotypic Ag3Zr2F14 by replacing only one of the two crystallographically different Ag2+ ions with Zn2+ ions, thus leading to discrete Ag2F7 dimers. These dimers are connected via nearly linear Ag–F···F–Ag bridges with short F···F distances of 2.33 Å to form two‐legged ladders. Magnetic susceptibility measurements and density functional calculations show that the two Ag2+ ions in each Ag2F7 dimer are strongly coupled antiferromagnetically.  相似文献   

6.
Single crystals of HgII(H4TeVIO6) (colourless to light‐yellow, rectangular plates) and HgI2(H4TeVIO6)(H6TeVIO6)·2H2O (colourless, irregular) were grown from concentrated solutions of orthotelluric acid, H6TeO6, and respective solutions of Hg(NO3)2 and Hg2(NO3)2. The crystal structures were solved and refined from single crystal diffractometer data sets (HgII(H4TeVIO6): space group Pna21, Z = 4, a =10.5491(17), b = 6.0706(9), c = 8.0654(13)Å, 1430 structure factors, 87 parameters, R[F2 > 2σ(F2)] = 0.0180; HgI2(H4TeVIO6)(H6TeVIO6)·2H2O: space group P1¯, Z = 1, a = 5.7522(6), b = 6.8941(10), c = 8.5785(10)Å, α = 90.394(8), β = 103.532(11), γ = 93.289(8)°, 2875 structure factors, 108 parameters, R[F2 > 2σ(F2)] = 0.0184). The structure of HgII(H4TeVIO6) is composed of ribbons parallel to the b axis which are built of [H4TeO6]2— anions and Hg2+ cations held together by two short Hg—O bonds with a mean distance of 2.037Å. Interpolyhedral hydrogen bonding between neighbouring [H4TeO6]2— groups, as well as longer Hg—O bonds between Hg atoms of one ribbon to O atoms of adjacent ribbons lead, to an additional stabilization of the framework structure. HgI2(H4TeVIO6)(H6TeVIO6)·2H2O is characterized by a distorted hexagonal array made up of [H4TeO6]2— and [H6TeO6] octahedra which spread parallel to the bc plane. Interpolyhedral hydrogen bonding between both building units stabilizes this arrangement. Adjacent planes are stacked along the a axis and are connected by Hg22+ dumbbells (d(Hg—Hg) = 2.5043(4)Å) situated in‐between the planes. Additional stabilization of the three‐dimensional network is provided by extensive hydrogen bonding between interstitial water molecules and O and OH‐groups of the [H4TeO6]2— and [H6TeO6] octahedra. Upon heating HgI2(H4TeVIO6)(H6TeVIO6)·2H2O decomposes into TeO2 under formation of the intermediate phases HgII3TeVIO6 and the mixed‐valent HgIITeIV/VI2O6.  相似文献   

7.
The new quaternary oxide Ag4CuTeO6 has been obtained by solid state reaction starting from stoichiometric amounts of the binary oxides at elevated temperatures and oxygen pressures. Ag4CuTeO6 crystallises in space group C2/c with a = 11.3021(8), b = 9.6875(6), c = 5.7082(5) Å, β = 99.301(7)°, V = 616.77(8) Å3, Z = 4; the structure refinement was based on 747 independent reflections and resulted in R1 = 3.26 %, wR2 = 7.29 %. The crystal structure consists of isolated TeO6 octahedra which are connected by distorted CuO4 squares, thus forming one‐dimensional, infinite heteropolyanions, extending along the c axis. According to the approximately fcc packing and a distorted octahedral oxygen environment of all the cations, the structure may be regarded a derivative of the NaCl structure type. Ag4CuTeO6 is paramagnetic between 300 K and 7 K, where it develops antiferromagnetic ordering. An evaluation according to the Curie‐Weiss law yielded a magnetic moment of 1.86 μB per copper ion. The electronic conductivity shows a maximum at ~ 75 K, below a temperature characteristic of a semiconductor, above of a metal.  相似文献   

8.
Synthetic Cs(VO2)3(TeO3)2 is built up from infinite sheets of distorted octahedral VVO6 groups, sharing vertices. These octahedral layers are “capped” by Te atoms (as parts of pyramidal [TeIVO3]2– groups) on both faces of each V/O sheet, with inter‐layer, 12‐coordinate, Cs+ cations providing charge compensation. Cs(VO2)3(TeO3)2 is isostructural with M(VO2)3(SeO3)2 (M = NH4, K). Crystal data: Cs(VO2)3(TeO3)2, Mr = 732.93, hexagonal, space group P63 (No. 173), a = 7.2351(9) Å, c = 11.584(2) Å, V = 525.1(2) Å3, Z = 2, R(F) = 0.030, wR(F 2) = 0.063.  相似文献   

9.
Three new uranyl polyphosphates, α‐K[(UO2)(P3O9)] ( 1 ), β‐K[(UO2)(P3O9)] ( 2 ), and K[(UO2)2(P3O10)] ( 3 ), were prepared by high‐temperature solid‐state reactions. The crystal structures of the compounds have been solved by direct methods: 1 – monoclinic, P21/m, a = 8.497(1), b = 15.1150(1), c = 14.7890(1) Å, β = 91.911(5)°, V = 1898.3(3) Å3, Z = 4, R1 = 0.0734 for 4181 unique reflections with |F0| ≥ 4σF; 2 – monoclinic, P21/n, a = 8.607(1), b = 14.842(2), c = 14.951(1) Å, β = 95.829(5)°, V = 1900.0(4) Å3, Z = 4, R1 = 0.0787 for 3185 unique reflections with |F0| ≥ 4σF; 3 – Pbcn, a = 10.632(1), b = 10.325(1), c = 11.209(1) Å, V = 1230.5(2) Å3, Z = 4, R1 = 0.0364 for 1338 unique reflections with |F0| ≥ 4σF. In the structures of 1 and 2 , phosphate tetrahedra share corners to form infinite [PO3]? chains, whereas, in the structure of 3 , tetrahedra form linear [P3O10]5? trimers. The structures are based upon 3‐D frameworks of U and P polyhedra linked by sharing common O corners. The infinite [PO3]? chains in the structures of 1 and 2 are parallel to [100] and [–101], respectively. The uranyl polyphosphate frameworks are occupied by host K+ cations.  相似文献   

10.
Ag6(VIVO)2(PO4)2(P2O7) was obtained by reaction of Ag3PO4 and (VO)2P2O7 (sealed ampoule, 550 °C, 3 d). The crystal structure of the new mixed ortho‐pyrophosphate was determined from X‐ray single‐crystal data [Pnma, Z = 4, a = 12.759(3) Å, b = 17.340(4) Å, c = 6.418(1) Å, R1 = 0.071, wR2 = 0.184 for 3174 unique reflections with Fo > 4σ(Fo), 141 variables]. Ag+ ions are located in between layers [(VIVO)2(PO4)2(P2O7)]6–. Equilibrium relations of the new phosphate to neighboring phases were determined. The electronic structure of the (VIV≡O)2+ group was investigated by polarized electronic absorption spectroscopy (ν̃1a = 9450 cm–1, ν̃1b = 9950 cm–1, ν̃2 = 14750 cm–1), EPR spectroscopy [X‐ and Q‐band, powder and single crystal, orthorhombic crystal g‐tensor with g1 = 1.9445(3), g2 = 1.9521(3), g3 = 1.9695(3)], and magnetic measurements (powder, μexp/μB = 1.71, Θp = –1.7 K).  相似文献   

11.
Single crystals of Hg2TeO5 were obtained as dark‐red parallelepipeds by reacting stoichiometric amounts of Hg(NO3)2 · H2O and H6TeO6 under hydrothermal conditions (250 °C, 10d). The crystal structure (space group Pna21, Z = 4, a = 7.3462(16), b = 5.8635(12), c = 9.969(2)Å, 1261 structure factors, 50 parameters, R[F2 > 2σ(F2)] = 0.0295) is characterized by corner‐sharing [TeO6] octahedra forming isolated chains [TeO4/1O2/2] which extend parallel to [100]. The two crystallographically independent Hg atoms are located in‐between the chains and interconnect the chains via common oxygen atoms. Amber coloured single crystals of Hg3TeO6 were prepared by heating a mixture of Hg, HgO and TeO3 together with small amounts of HgCl2 as mineralizer in an evacuated and sealed silica glass tube (520 °C). The previously reported crystal structure has been re‐investigated by means of single crystal X‐ray data which reveal a symmetry reduction from Iad to Ia3¯ (Z = 16, a = 13.3808(6) Å, 609 structure factors, 33 parameters, R[F2 > 2σ(F2)] = 0.0221). The crystal structure is made up of a body‐centred packing of [TeO6] octahedra with the Hg atoms situated in the interstices of this arrangement. Upon heating, both title compounds decompose in a one‐step mechanism under formation of TeO2 and loss of the appropriate amounts of elementary mercury and oxygen.  相似文献   

12.
Abstract

The X-ray crystal structures of two closely related Ag(I) complexes of 15-crown-5 and benzo-15-crown-5 are reported. In the case of [Ag(15-crown-5)2][SbF6] 1, pointing one of its oxygen atoms away from the Ag+ cation enables one of the crown ligands to take part in an intermolecular C?H…O hydrogen bond. The analogous benzo-15-crown-5 species, [Ag(benzo-15-crown-5)2][SbF6] 2, is too rigid to attain the necessary conformation. Crystal data for 1: P21/c, a = 8.4481(3), b = 25.5813(9), c = 13.2773(4) Å, β = 101.354(2)°. Z = 4, unique data: 5187 R 1 [F 2 > 2σ(F 2)] 0.0259. Compound 2: P1, a = 8.6511 (15) Å, b =10.2322(18) Å, c = 19.291(3) Å, α = 103.704 (2)°, β = 101.274(2)°, γ = 95.952(2)°, Z = 2, unique data: 5803 R 1 [F 2>2σ(F 2)] 0.0931.  相似文献   

13.
Ag2Se (naumannite) was investigated by means of temperature dependent synchrotron powder diffraction and DTA. Upon heating in air the known 1st order phase transition from orthorhombic low‐temperature Ag2Se (P212121, Z = 4) to cubic ion conducting high‐temperature Ag2Se (Im3m, Z = 2) was observed at approx. 140 °C. Upon cooling a small hysteresis was detected (TPU = 120 °C). It was found that when heated in air Ag2Se segregates elemental selenium. After cooling to ambient temperature the resulting low‐temperature Ag2Se can no longer be described in the known structural model with harmonic terms, the use of anharmonic terms is probably necessary. The phase transition and the segregation of selenium are accompanied by an increased crystallinity of the sample, as the halfwidths of the reflections become significantly smaller. Approaching the phase transition the lattice parameters of orthorhombic Ag2Se show a distinct anisotropic behaviour: b and c show a positive and a a negative thermal expansion. When heated in argon the segregation of selenium is not observed.  相似文献   

14.
A new ammonium vanadium tellurate, (NH4)4{(VO2)2[Te2O8(OH)2]}·2H2O ( 1 ) was hydrothermally synthesized and characterized by elemental analyses, IR spectrum, TG analysis, and single crystal X–ray diffraction. Compound 1 crystallizes in the monoclinic system, space group P21/n, a = 7.3843(15) Å, b = 17.111(3) Å, c = 7.3916(15) Å, β = 118.88(3)°, V = 817.9(3) Å3, Z = 2, R1 (I>2σ(I)) = 0.0235, wR2 (all data) = 0.0462. The structure of 1 consists of infinite anionic chains, {(VO2)2[Te2O8(OH)2]}4? which contain octahedral VO6 and TeO5OH units. Each octahedral VO6 and TeO5OH unit is connected by sharing an edge to form V2O10 and Te2O8(OH)2 binuclear units. The V2O10 and Te2O8(OH)2 binuclear units are alternatively connected to one another, creating complete infinite {(VO2)2[Te2O8(OH)2]}4? chains along the c direction. The anionic chains are separated by ammonium cations and water molecules that link the chains through a network of hydrogen bonds. In addition, the structure contains an extended network of O–H·····O hydrogen bonds between the chains.  相似文献   

15.
The Crystal Structure of the Low‐Temperature Form of Ag5Te2Cl Crystals of trimorphic Ag5Te2Cl were obtained by solid state reaction from a stoichiometric mixture of silver, tellurium, and tellurium(IV)chloride (480 °C, 4–10 days). The crystals were cooled down to –80 °C without decomposition and data collection was carried out at this temperature. The low temperature form of the title compound crystallizes in space group P21/c with lattice constants of a = 19.359(1) Å, b = 7.713(1) Å, c = 19.533(1) Å, β = 90.6°(1), V = 2916.4(1), and Z = 16. The refinement converged to residual values of R1 = 0.0381 and wR2 = 0.0847, respectively. Te and Cl atoms form empty, distorted octahedra interconnected by common vertices to give a 3D‐network. Ag atoms form clusters with Ag–Ag distances between 2.83 Å and 3.10 Å.  相似文献   

16.
On Ag2SnO3, the First Silver Stannate For the first time, crystals of red Ag2SnO3 have been obtained by solid state reaction of freshly prepared K2Sn(OH)6 and Ag2O at 430°C while applying an oxygen pressure of 350 bar. Ag2SnO3 shows a one dimensional incommensurate superstructure with a′ = 33.1 Å. Here we report on the basic structure of Ag2SnO3. According to the results of X-ray crystal structure determination the basic structure of Ag2SnO3 may be described in P6322 (a = 5.6230(4) Å, c = 12.6694(14) Å, Z = 4, 968 independent reflections, R1 = 5.6%, wR2 = 12.5%). Within the layered “SnO3” partial structure two third of the octahedral voids are occupied by tin. Those SnO3 layers are connected to each other by almost linearly coordinated silver atoms. Additionally, silver occupies the free octahedral voids within the SnO3 sheets. As expressed by the formula Ag[Ag1/3Sn2/3]O2 the structure may be described as a super structure of Delafossite CuFeO2.  相似文献   

17.
Two novel borophosphates, MII(C4H12N2)[B2P3O12(OH)] (MII = Co, Zn), exhibiting open frameworks, have been synthesized by hydrothermal reactions (T = 165 °C). The crystal structures of the isotypic compounds have been determined both at 293 K (orthorhombic, Ima2 (no. 46), Z = 4; MII = Co: a = 12.4635(4) Å, b = 9.4021(4) Å, c = 11.4513(5) Å, V = 1341.90 Å3, R1 = 0.0202, wR2 = 0.0452, 2225 observed reflections with I > 2σ(I); MII = Zn: a = 12.4110(9) Å, b = 9.4550(5) Å, c = 11.4592(4) Å, V = 1344.69 Å3, R1 = 0.0621, wR2 = 0.0926, 1497 observed reflections with I > 2σ(I)). Distorted CoO6‐octahedra and ZnO5‐square‐pyramids, respectively, share common oxygen‐corners with BO4‐, PO4‐ and (HO)PO3‐tetrahedra. The tetrahedral groups are linked via common corners to form infinite loop‐branched borophosphate chains [B2P3O12(OH)4–]. The open framework of MII‐coordination polyhedra and tetrahedral borophosphate chains contains a three‐dimensional system of interconnected structural channels running along [100], [011] and [011], respectively, which are occupied by di‐protonated piperazinium ions.  相似文献   

18.
Ag9I(GeO4)2 was obtained for the first time by reacting a stoichiometric mixture of Ag2O, AgI, and GeO2, at elevated oxygen pressures, adding a small portion of distilled water. The synthesis was done at 480 °C and 110 MPa of oxygen pressure. It crystallizes in space group C2/m, with the unit cell dimensions a = 17.3736(9) Å, b = 6.9177(4) Å, c = 5.7176(3) Å, β = 105.501(3)°, V = 662.18(6) Å3, and Z = 2. The structure refinement was based on 638 independent reflections and resulted in R1 = 6.26 %. The crystal structure consists of isolated (GeO4)4– ions and [IAg12] metallo complexes, the latter are interconnected through each two common edges and corners corresponding to [IAg6/1Ag6/2], thus forming infinite layers within the (100) plane. The Ag/I slabs are stacked perpendicular to the a‐axis with an interlayer distance of about 3.4 Å. The (GeO4)4– anions are located in the gaps between the silver iodide layers. According to the results of impedance measurements, Ag9I(GeO4)2 is a good silver ion conductor. The compound shows an increase in the ionic conductivity in the temperature range of 30 to 310 °C, and has a silver ion conductivity of 1.1 × 10–3 Ω–1 cm–1 at room temp. The activation energy for silver ion conduction is 0.35 eV, in the temperature range from 25 to 190 °C.  相似文献   

19.
Syntheses and Structures of the Polymeric Silver Complexes [Ag2Cl2(dppbp)3], [Ag2(SPh)2(dppe)3] and [Ag2(SPh)2(triphos)] as well as the Silver Chalcogenido Clusters [Ag7(SPh)7(dppm)3], {[Ag7(TePh)7(dppp)3]2(dppp)}, and [Ag22Cl(SPh)10(PhCOO)11(dmf)3] The reaction of silver carboxylate with silylated chalcogen compounds have been found to have a possibility for the synthesis of metal‐chalcogenide‐custers. Especially phosphine ligands have been found to be useful in stabilising the cluster cores. Some of the silver carboxylate phosphine complexes, which are formed in‐situ, ([Ag2Cl2(dppbp)3] ( 1 )) and some silver chalcogen complexes ([Ag2(SPh)2(dppe)3] ( 2 ) und [Ag2(SPh)2(triphos)] ( 3 )), could be isolated and characterised by X‐ray diffraction. Using special reaction conditions, it is possible to isolate cluster species like [Ag7(SPh)7(dppm)3] ( 4 ), {[Ag7(TePh)7(dppp)3]2(dppp)} ( 5 ) and [Ag22Cl(SPh)10(PhCOO)11(dmf)3] ( 6 ) beside the complex compounds. 1: Space group P21/n (No. 14), Z = 2, a = 1336, 1(2), b = 2081, 2(5), c = 2015, 4(4) pm, β = 99, 87(2)°; 2: Space group P21/n (No. 14), Z = 2, a = 1416, 1(3), b = 1874, 7(4), c = 1444, 8(3) pm, β = 93, 26(3)°; 3: Space group P21/n (No. 14), Z = 4, a = 1456, 8(3, b = 1890, 2(4), c = 1916, 1(4) pm, β = 99, 11(3)°; 4: Space group P21/n (No. 14), Z = 4, a = 1570, 2(3), b = 2798, 5(6), c = 2752, 7(6) pm, β = 98, 02(3)°; 5: Space group P1 (No. 2), Z = 2, a = 2115, 5(4), b = 2553, 3(5), c = 3188, 7(6) pm, α = 68, 87(3)°, β = 74, 05(3)°, γ = 69, 70(3)°; 6: Space group P1 (No. 2), Z = 2, a = 1583, 0(3), b = 1709, 6(3), c = 2990, 0(6) pm, α = 80, 41(3)°, β = 88, 86(3)°, γ = 71, 10(3)°).  相似文献   

20.
Three polymeric silver(I) complexes with terephthalate anions as counterions or ligands, [Ag(pren)]2(tp)·2H2O ( 1 ), [Ag(en)][Ag(μ2‐tp)]·H2O ( 2 ), and [Ag2(μ4‐tp)(apy)2] ( 3 ) (where pren = 1, 2‐propylenediamine, tp =terephthalate dianion, en = ethylenediamine, and apy = 2‐aminopyridine) were synthesized and characterized by X‐ray single crystal analysis and infrared spectroscopy. 1 crystallizes in the monoclinic space group P211/c with a = 11.3221(5), b = 7.1522(3), c = 14.8128(5)Å, V = 1015.77(7)Å3, β = 122.132(2), and Z = 2. 2 crystallizes in the orthorhombic space group Pnma with a = 9.6144(6), b = 11.3465(7), c = 11.4810(7)Å, V = 1252.5(1)Å3, and Z = 4. 3 crystallizes in the monoclinic space group P21/n with a = 8.2003(5), b = 5.8869(4), c = 18.3769(11)Å, β = 92.593(1), V = 886.2(1)Å3, and Z = 4. Terephthalate dianions are not coordinated to the metal atoms in 1 , but act as a μ2‐bridging ligand in 2 and as a μ4‐bridging ligand in 3 .  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号