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1.
Na5Br(OH)4: Synthesis and Structure of a Compound in the System NaOH/NaBr The pseudobinary system NaOH/NaBr is investigated by X-ray methods. The structure of the compound Na5Br(OH)4 was solved by single crystal data: Na5Br(OH)4: Pnma, Z = 8, a = 11.846(2) Å, b = 18.782(4) Å, c = 6.431(1) Å, Z(Fo) = 1 202 with (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 100, R/Rw = 0.030/0.035 The compound crystallizes in a new type of structure. Pairs of octahedra around O by 5 Na and 1 H to [Na5(OH)]2 are orientated in such a way to one another that two ions OH? form a parallelogram hinting to unusual bent hydrogen bridge bonding.  相似文献   

2.
Na7I2(OH)5: A Hydroxide Iodide in the System NaOH/NaI The pseudobinary system NaOH/NaI is investigated by X-ray methods. The crystal structure of the compound Na7I2(OH)5 was solved by single crystal data: Na7I2(OH)5: P4/nmm, Z = 2, a = 7.748(2) Å, c = 10.260(3) Å, Z(Fo) = 443 with (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 28, R/Rw = 0.044/0.059 Na7I2(OH)5 crystallizes in a new type of structure which contains puckered layers of ∞2[Na7(OH)52+] connected via iodide ions.  相似文献   

3.
Rb2I(OH): A Hydroxide Iodide in the System RbOH/RbI The pseudobinary system RbOH/RbI was investigated by X-ray methods. The crystal structure of Rb2I(OH) was solved by single crystal data: Rb2I(OH): Pnma, Z = 4, a = 7.748(1) Å, b = 5.654(2) Å,c = 13.254(2) Å Z(Fo) with (Fo)2 ? 3σ = (Fo)2 = 449, Z (parameter) = 25, R/Rw = 0.021/0.023 Rb2I(OH) crystallizes in a new type of structure, built up by a three dimensional network of [Rb2(OH)+] containing the iodide ions.  相似文献   

4.
H. BARLAGE  H. JACOBS 《ChemInform》1996,27(33):no-no
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.  相似文献   

5.
K2Br(OH) and Rb2Br(OH): Two New Ternary Alkali Metal Halide Hydroxides with a Pronounced Structural Relationship to KOH resp. RbOH Two isotypic compounds K2Br(OH) and Rb2Br(OH) were prepared in the systems KOH/KBr and RbOH/RbBr. Their structures were determined by single crystal X-ray methods: K2Br(OH): P21/m, Z = 2, a = 6.724(1) Å, b = 4.272(4) Å, c = 8.442(2) Å, β = 108.14(2)°, Z(Fo) = 651 with (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 28, R/Rw = 0.041/0.047 Rb2Br(OH): P21/m, Z = 2, a = 6.918(3) Å, b = 4.483(2) Å, c = 8.850(5) Å, β = 108.08(6)°, Z(Fo) = 326 mit (Fo)2 ≥ 3σ(Fo)2, Z(parameter) = 27, R/Rw = 0.074/0.082. The compounds are built up by chains of [M2(OH)+] connected via Br?. The structure of the chains as well as their orientation to one another show a pronounced relationship to the structures of the room temperature modifications of the isotypic binary hydroxides KOH and RbOH.  相似文献   

6.
Tetraammine Lithium Cations Stabilizing Phenylsubstituted Zintl-Anions: The Compound [Li(NH3)4]2[Sn2Ph4] Ruby-red, brittle single crystals of [Li(NH3)4]2[Sn2Ph4] were synthesized by the reaction of diphenyltin dichloride and metallic lithium in liquid ammonia at ?35°C. The structure was determined from X-ray singlecrystal diffractometer data: Space group, P1 , Z = 1, a = 9.462(2) Å, b = 9.727(2) Å, c = 11.232(2) Å, α = 66.22(3)°, β = 85.78(3)°, γ = 61.83(3)°, R1 (F ? 4σF) = 5.13%, wR2 (F02 ? 4σF) = 10.5%, N(F ? 4σF) = 779, N(Var.) = 163. The compound contains to Sb2Ph4 isosteric centres [Sn2Ph4]2? as anions which are connected to rods by lithium cations in distorted tetrahedral coordination by ammonia. These rods are arranged parallel to one another in the b,c-plane, but stacked along [100].  相似文献   

7.
Synthesis and Structure of New Sodium Hydrogen Sulfates Na(H3O)(HSO4)2, Na2(HSO4)2(H2SO4), and Na(HSO4)(H2SO4)2 Three acidic sodium sulfates have been synthesized from the system sodium sulfate/sulfuric acid and have been crystallographically characterized. Na(H3O)(HSO4)2 ( A ) crystallizes in the space group P21/c with the unit cell parameters a = 6.974(2), b = 13.086(2), c = 8.080(3) Å, α = 105.90(4)°, V = 709.1 Å3, Z = 4. Na2(HSO4)2(H2SO4) ( B ) is orthorhombic (space group Pna21) with the unit cell parameters a = 9.970(2), b = 6.951(1), c = 13.949(3) Å, V = 966.7 Å3 and Z = 4. Na(HSO4)(H2SO4)2 ( C ) crystallizes in the triclinic space group P1 with the unit cell parameters a = 5.084(1), b = 8.746(1), c = 11.765(3) Å, α = 68.86(2)°, β = 88.44(2)°, γ = 88.97(2)°, V = 487.8 Å3 and Z = 2. All three compounds contain SO4 tetrahedra as HSO4? anions and additionally in B and C in form of H2SO4 molecules. The ratio H:SO4 determines the connectivity degree in the hydrogen bond system. In A , there are zigzag chains and dimers additionally connected via oxonium ions. Complex chains consisting of cyclic trimers (two HSO4? and one H2SO4) are present in B . In structure C , several parallel chains are connected to columns due to the greater content of H2SO4. Sodium cations show a distorted octahedral coordination by oxygen in all three structures, the NaO6 octahedra being “isolated” (connected via SO4 tetrahedra only) in A . Pairs of octahedra with common edge form Na2O10 dimeric units in C . Such double octahedra are connected via common corners forming zigzag chains in B .  相似文献   

8.
9.
Na2Mn(NH2)4: A New Type of Layered Structure The structure of Na2Mn(NH2)4 was solved by X-ray single crystal data including H-positions: P21/c, Z = 4, a = 6.331(1) Å, b = 14.542(3) Å, c = 7.212(1) Å, β = 116.29(1)°, Z(F ≥ 3σ = (F)) = 1343, Z(parameters) = 96, R/RW = 0.023/0.029. The compound crystallizes in a new type of structure. Within layered blocks the amide ions are arranged with the motif of a hexagonal closest packing of spheres. Within these blocks alternating layers contain sodium in all octahedral sites and manganese in an ordered way in a quarter of tetrahedral sites.  相似文献   

10.
NaAuIn2, a Ternary Auride with Ethane Analogous In2Au6 Building Units and [In2/2] Chains Silver coloured, brittle single crystals of NaAuIn2 were synthesized by the reaction of NaN3, gold-sponge and indium at 500°C. The structure was determined from X-ray single-crystal diffractometry data: space group Cmcm, Z = 4, a = 4.482(1) Å, b = 10.366(2) Å, c = 7.869(2) Å, R/Rw(w = 1) = 0.017/0.020, Z(F) ≥ 3σ(F) = 547 and N(var.) = 16. NaAuIn2 crystallizes in the MgCuAl2-structure type. Gold and indium form a framework structure. [AuIn6/3] layers with trigonal prismatically coordinated gold are connected via In—In contacts along [010] which consist of ethane analogous In2Au6-building units. The In-partial structure consists of saw tooth like [In2/2] chains along [001]. The sodium atoms occupy channel-like cavities within the Au—In framework structure.  相似文献   

11.
Synthesis and Crystal Structure of Na10[P4(NH)6N4](NH2)6(NH3)0.5 with an Adamantane-like Anion [P4(NH)6N4]4? Crystals of Na10[P4(NH)6N4](NH2)6(NH3)0.5 were obtained by the reaction of P3N5 with NaNH2 (molar ratio 1:20) within 5 d at 600°C in autoclaves. The following data characterize X-ray investigations: Fm3 m, Z = 8, a = 15.423(2) Å, Z(F) = 261 with F ≥ 3 σ(F) Z(Variables) = 27, R/Rw = 0.086/0.089 The compound contains the hitherto unknown anion [P4(NH)6N4]4?, which resembles adamantane. The total structure can be described as follows: The centers of gravity of units of [Na8(NH2)6(NH3)]2+ – 8Na+ on the corners of a cube, 6NH2? on the ones of an inscribed octahedron with NH3 in the center – follow the motif of a cubic-closest packed arrangement. Units of [Na12(NH2)6]6+ – 12Na+ on the corners of a cuboctahedron and 6NH2? on the ones of an inscribed octahedron – occupy all octahedral and those of [P4(NH)6N4]4? all tetrahedral sites.  相似文献   

12.
Synthesis and Crystal Structure of Na2Zn(OH)4 Crystallization from saturated sodium hydroxozincate solutions yields colourless platelets of crystals of Na2Zn(OH)4. The X‐ray structure determination on these crystals was successful including all hydrogen positions. P21/n, Z = 4, a = 7.959(3) Å, b = 6.534(1) Å, c = 8.501(3) Å, β = 93.97(3)°, N(F2o ° 2σ F2o) = 1668, N(Var.) = 81, R1/wR2 = 0.043/0.107. Na2Zn(OH)4 crystallizes in a layered structure. Alternate layers contain Na+ in octahedral and Zn2+ in tetrahedral coordination by OH.  相似文献   

13.
An Octahedral Niobium Cluster containing Six Terminal Azide Groups: The Structure of Rb4[Nb6Br12(N3)6](H2O)2 Six terminal halide ligands of [Nb6Br12Br6]4? can be substituted in solution by azide ions. Single-crystals of Rb4[Nb6Br12(N3)6](H2O)2 were obtained during the evaporation of the water/methanol solvent, and structurally characterized by X-ray methods: Space group P21/c, Z = 2, a = 970.8(5) pm, b = 1525.4(7) pm, c = 1280.0(7) pm, β = 97.15(6)°. The [Nb6Br12(N3)6]4? ions contain six terminal azide groups at the corners of the octahedral niobium cluster (d Nb–N = 227 pm). The [Nb6Br12(N3)6]4? ions are interconnected by Rb+ and H2O. Crystals of Rb4[Nb6Br12(N3)6](H2O)2 are explosive towards heat or mechanic pressure.  相似文献   

14.
Li2Br(NH2): The First Ternary Alkali Metal Amide Halide The pseudobinary system LiNH2/LiBr was investigated by X-ray methods. The crystal structure of the compound Li2Br(NH2) was solved by single crystal data: Li2Br(NH2): Pnma, Z = 8, a = 12.484(2) Å, b = 7.959(1) Å, c = 6.385(1) Å, Z(Fo) with (Fo)2 ≧ 3σ(Fo)2 = 348, Z (parameter) = 51, R/Rw = 0.019/0.021 Li2Br(NH2) crystallizes in a new type of structure. To one another isolated chains of [Li2Li4/2(NH2)22+] show the motif of closest rod packing. They are connected via bromide ions in a distorted cubic primitive arrangement.  相似文献   

15.
NaAuGe, a Further Ternary Auride with Ethane Analogous Ge2Au6 Building Units Black, brittle single crystals of NaAuGe were obtained by the reaction of NaN3, gold sponge and germanium at 800°C. The structure was determined from X-ray single-crystal diffractometry data: space group Imm2, Z = 4, a = 4.422(1) Å, b = 7.238(2) Å, c = 7.531(2) Å, R1/wR2 = 0.0195/0.0482, N(F) ≥ 2σ(F) = 811 and N(var.) = 21. NaAuGe crystallizes in a new ternary variant of the KHg2 (CeCu2)structure type. Gold and germanium form puckered [AuGe3/3] layers with trigonal planar coordinated gold. The [AuGe3/3] nets are connected to a framework structure via Ge—Ge contacts along [010] which consist of ethane analogous Ge2Au6 building units. The sodium atoms are placed in channels of the Au—Ge framework structure which run along [100] and [010].  相似文献   

16.
Na4AuTl, the First Ternary Compound in the System Sodium/Gold/Thallium Silver coloured, brittle single crystals of Na4AuTl were obtained by the reaction of NaN3, gold sponge and TlN3 at 773 K. The structure was determined from X-ray single-crystal diffractometry data: Na4AuTl crystallizes in a new structure type with separated gold and thallium partial structures. These consist of linear [Au2/2] chains and [Tl2] dumb-bells. Structural relationships between Na2Au and the Na Au partial structure of Na4AuTl are discussed.  相似文献   

17.
Synthesis, Structure and Thermolysis of NH4[Re3Br10] NH4[Re3Br10] crystallizes as dark brown single crystals upon slow cooling of a hot, saturated hydrobromic-acid solution of [Re3Br9(H2O)2] after the addition of NH4Br. The crystal structure (monoclinic, C2/m (Nr. 12); Z = 4; a = 1461.6(7), b = 1 085.6(4), c = 1030.3(7) pm, β = 92.63(4)°, Vm = 245.9(4)cm3/mol; R = 0.097, Rw = 0.043) contains [Re3Br12]? units that share two common edges. These chains run along [010] and are held together by NH4+ ions. Each NH4+ is surrounded by eight Br? from four different chains. The first step of the thermal decomposition at 290°C is the disproportionation to ReBr3 (ReCl3 type), rhenium metal and (NH4)2[ReBr6]. Secondly, the internal reduction of (NH4)2[ReBr6] at 390°C to rhenium metal takes place.  相似文献   

18.
About Ba4Ir3O10 Single crystals of Ba4Ir3O10 were prepared by a flux technique. X-ray investigations show monoclinic symmetry, space group C2h5–P21/a; a = 5.788; b = 13.222; c = 7.242 Å; β = 112.98°; Z = 2. Ir3O12 tripel, built up by face-sharing of IrO6 octahedra, are edge-connected into wave-like twodimensional planes. Ba4Ir3O10 is related to Ba4(Ti, Pt)3O10.  相似文献   

19.
On the Crystal Structure of Barium-Copper-Orthoarsenate BaCu2(AsO4)2 Single crystals of BaCu2(AsO4)2 were prepared above 1 000°C by CO2-LASER technique and investigated by X-ray structure determination. The light blue crystals show monoclinic symmetry, space group C? P21/n, a = 4.752; b = 8.506; c = 8.945 Å; β = 93.49°, Z = 2. BaCu2(AsO4)2 represents a hitherto unknown structure type with Cu2+ in trigonal bipyramidal coordination. Ba2+ shows an 8 + 2 surrounding by O2? and As5+ is tetrahedrally coordinated. The crystal structure is discussed with respect to related orthophosphates and vanadates.  相似文献   

20.
Compounds in the Systems Potassium(Rubidium)/Gold/Antimony: K3Au3Sb2, Rb3Au3Sb2, and K1,74Rb0,26RbAu3Sb2 Brittle, silver coloured single crystals of K3Au3Sb2, Rb3Au3Sb2 and K1,74Rb0,26RbAu3Sb2 were obtainded by reaction of the alkali metal azides (KN3, RbN3) with gold and antimon powder at 550°C. The structures of the isotypic compounds (R3 m, Z = 3) were determined by X-ray single-crystal diffractometer data: K3Au3Sb2, a = 6,198(2) Å, c = 21,520(5) Å, R/Rw (w = 1) = 0,046/0,058, Z(F) ? 3σ(F) = 175, Z(Var.) = 14; Rb3Au3Sb2, a = 6,443(3), c = 21,69(2), R/Rw (w = 1) = 0,059/0,082, Z(F) ? 3σ(F02) = 258, Z(Var.) = 14; K1,74Rb0,26RbAu3Sb2, a = 6,288(2) Å, c = 21,617(5) Å, R/Rw (w = 1) = 0,049/0,069, Z(F) ? 3σ(F) = 390, Z(Var) = 14. The compounds crystallize with the K3Cu3P2-structure type. The Au? Sb partial structures consist of [AuSb2/3] layers with linear Sb? Au? Sb dumb-bells and SbAu3 pyramids. The layers are separated by two crystallographically independent alkali metal atoms along [001].  相似文献   

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