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  • 1
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The structure of the title compound, [Co2(C8H18Sn2)(CO)6], a distannyl-substituted dicobaltatetrahedrane, shows geometrical parameters noticeably different from those observed in the only monostannyl-substituted dicobaltatetrahedrane structurally studied so far. Thus, the complexed acetylenic bond in the title compound is shorter, and the cobalt–cobalt and cobalt–carbon bonds are longer, while the Sn—C—C angles are much smaller than in the complex with monostannyl-substituted ligand.
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  • 2
    ISSN: 1600-5368
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The title compound, [Co2(C25H22P2)(C8H18Sn2)(CO)4], was prepared by displacement of two molecules of carbon monoxide in hexacarbonyldicobalt[μ,η2-bis-(trimethylstannyl)]acetylene with a bidentate bis(diphenylphosphino)methane ligand. The displacement of carbon monoxide yields the product with substantially increased thermal stability and brings about noticeable changes in the geometry of the dicobaltatetrahedrane moiety, viz. lengthening of the carbon–carbon bond and shortening of the cobalt–cobalt and cobalt–carbon bonds.
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  • 3
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Columnarstructures of Tri- and Diamminenitrates, [M(NH3)3]NO3 and [M(NH3)2]NO3 of Monovalent Copper and SilverIn liquid ammonia [Cu(NH3)4](NO3)2 reacts with copper at room temperature to [Cu(NH3)3]NO3; the product decomposes at lower NH3 pressures to [Cu(NH3)2]NO3. With AgNO3 single crystals of [Ag(NH3)3]NO3 can be grown from liquid NH3 and [Ag(NH3)2]NO3 from a solution of NH3 in water.Single crystal X-ray structure determination has been carried out  -  in spite of lower NH3 decomposition pressure  -  on the more stable Ag complexes. Guinier data revealed that the corresponding Cu and Ag compounds are isotypic: \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm [M(NH}_{\rm 3} {\rm)}_{\rm 3}]{\rm NO}_3 :{\rm P}\mathop 6\limits^ - 2{\rm c \,N = 2} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm M} \buildrel \wedge \over = {\rm Cu}} & {{\rm a = 7.837(2)}{\AA}} & {{\rm c = 6.036(1)}} \\\end{array}{\AA} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm M} \buildrel \wedge \over = {\rm Ag}} & {{\rm a = 8.057(2)}{\AA}} & {{\rm c = 5.840(6)}} \\\end{array}{\AA} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {} & {{\rm R = 0.038}} & {{\rm R}_{\rm w} {\rm = 0.040}} \\\end{array}{\rm (w = 1) Z(}\mathop {\rm F}\nolimits_0^{\rm 2}) \ge 3\sigma {\rm (}\mathop {\rm F}\nolimits_0^{\rm 2}) = 217 $$\end{document} [M(NH3)2]NO3: Pnnm, N = 4 \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm M} \buildrel \wedge \over = {\rm Cu}} & {{\rm a = 10.637(3)}{\AA}} & {{\rm b = 7.863(2)}{\AA}} & {{\rm c = 6.118(2)}{\AA}} \\\end{array} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm M} \buildrel \wedge \over = {\rm Ag}} & {{\rm a = 10.573(2)}{\AA}} & {{\rm b = 8.110(2)}{\AA}} & {{\rm c = 6.286(1)}{\AA}} \\\end{array} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {} & {{\rm R = 0.029}} & {{\rm R}_{\rm w} {\rm = 0.033}} \\\end{array}{\rm (w = 1) Z(}\mathop {\rm F}\nolimits_0^{\rm 2}) \ge 3\sigma {\rm (}\mathop {\rm F}\nolimits_0^{\rm 2}) = 206 $$\end{document}The results of the structure determinations are given and the atomic arrangements are discussed by comparison.
    Notes: In flüssigem NH3 komproportioniert [Cu(NH3)4](NO3)2 mit elementarem Cu bei Raumtemperatur zu [Cu(NH3)3]NO3, das bei geringerem NH3-Partialdruck in die Diamminverbindung übergeht. Mit AgNO3 lassen sich aus flüssigem NH3 Kristalle von [Ag(NH3)3]NO3 und aus wäßrigem NH3 von [Ag(NH3)2]NO3 züchten.Die röntgenographische Strukturbestimmung mit Einkristallen wurde - wegen der geringeren NH3-Zersetzungsdrücke  -  an den stabileren Ag-Komplexen erfolgreich durchgeführt. Über Guinierdaten ließ sich zeigen, daß entsprechende Cu- und Ag-Verbindungen isotyp sind: \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm [M(NH}_{\rm 3} {\rm)}_{\rm 3}]{\rm NO}_3 :{\rm P}\mathop 6\limits^ - 2{\rm c \,Z = 2} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm M} \buildrel \wedge \over = {\rm Cu}} & {{\rm a = 7,837(2)}{\AA}} & {{\rm c = 6,036(1)}} \\\end{array}{\AA} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm M} \buildrel \wedge \over = {\rm Ag}} & {{\rm a = 8,057(2)}{\AA}} & {{\rm c = 5,840(6)}} \\\end{array}{\AA} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {} & {{\rm R = 0,038}} & {{\rm R}_{\rm w} {\rm = 0,040}} \\\end{array}{\rm (w = 1) Z(}\mathop {\rm F}\nolimits_0^{\rm 2}) \ge 3\sigma {\rm (}\mathop {\rm F}\nolimits_0^{\rm 2}) = 217 $$\end{document} [M(NH3)2]NO3: Pnnm, Z = 4 \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm M} \buildrel \wedge \over = {\rm Cu}} & {{\rm a = 10,637(3)}{\AA}} & {{\rm b = 7,863(2)}{\AA}} & {{\rm c = 6,118(2)}{\AA}} \\\end{array} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {{\rm M} \buildrel \wedge \over = {\rm Ag}} & {{\rm a = 10,573(2)}{\AA}} & {{\rm b = 8,110(2)}{\AA}} & {{\rm c = 6,286(1)}{\AA}} \\\end{array} $$\end{document} \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {} & {{\rm R = 0,029}} & {{\rm R}_{\rm w} {\rm = 0,033}} \\\end{array}{\rm (w = 1) Z(}\mathop {\rm F}\nolimits_0^{\rm 2}) \ge 3\sigma {\rm (}\mathop {\rm F}\nolimits_0^{\rm 2}) = 206 $$\end{document}.Die Ergebnisse der Strukturbestimmungen werden mitgeteilt und die Atomanordnungen vergleichend diskutiert.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1095-1097 
    ISSN: 0044-2313
    Keywords: Rubidium auride ; caesium auride ; preparation ; single-crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Single-Crystal Growth and Structure Refinement of RbAu and CsAuSingle-crystals of RbAu and CsAu were obtained by the reaction of the alkalimetal azides with gold-powder at 400°C. The structures were determined from X-ray single-crystal diffraktometer data: space group Pm3m, Z = 1; RbAu, a = 4.098(1) Å, R/Rw(w = 1) = 0.011/0.011, N(Fo2) ≥ 3σ(Fo2) = 41 and N(var.) = 4; CsAu, a = 4.258(1) Å, R/Rw(w = 1) = 0.009/0.010, N(Fo2) ≥ 3σ(Fo2) = 34 and N(var.) = 4. Both compounds crystallize in the completely ordered CsCl-type with neglible deviations from the ideal 1:1-composition.
    Notes: Einkristalle von RbAu und CsAu wurden durch Reaktion der Alkalimetallazide mit Goldpulver bei 400°C erhalten. Die Strukturen wurden aus Einkristall-Röntgen-Diffraktometerdaten bestimmt: Raumgruppe Pm3m, Z = 1; RbAu, a = 4,098(1) Å, R/Rw(w = 1) = 0,011/0,011, Z(Fo2) ≥ 3σ(Fo2) = 41 und Z(Var.) = 4; CsAu, a = 4,258(1) Å, R/Rw(w = 1) = 0,009/0,010, Z(Fo2) ≥ 3σ(Fo2) = 34 und Z(Var.) = 4. Beide Verbindungen kristallisieren im vollständig geordneten CsCl-Typ mit vernachlässigbarer Abweichung von der idealen 1:1-Zusammensetzung.
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  • 5
    ISSN: 0044-2313
    Keywords: Alkali metal gold antimon ; synthesis ; single-crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Compounds in the Systems Potassium(Rubidium)/Gold/Antimony: K3Au3Sb2, Rb3Au3Sb2, and K1,74Rb0,26RbAu3Sb2Brittle, 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 (R3m, 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(F02) ≥ 3σ(F02) = 175, Z(Var.) = 14; Rb3Au3Sb2, a = 6,443(3), c = 21,69(2), R/Rw (w = 1) = 0,059/0,082, Z(F02) ≥ 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(F02) ≥ 3σ(F02) = 390, Z(Var) = 14. The compounds crystallize with the K3Cu3P2-structure type. The Au—Sb partial structures consist of ∞2[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].
    Notes: Spröde, silberfarbene Einkristalle von K3Au3Sb2, Rb3Au3Sb2 und K1,74Rb0,26RbAu3Sb2 wurden durch Reaktion der Alkalimetallazide (KN3, RbN3) mit Gold- und Antimonpulver bei 550°C erhalten. Die Strukturen der isotypen Verbindungen (R3m, Z = 3) wurden aus Einkristall-Röntgen-Diffraktometerdaten bestimmt: K3Au3Sb2, a = 6,198(2) Å, c = 21,520(5) Å, R/Rw (w = 1) = 0,046/0,058, Z(F02) ≥ 3σ(F02) = 175, Z(Var.) = 14; Rb3Au3Sb2, a = 6,443(3), c = 21,69(2), R/Rw (w = 1) = 0,059/0,082, Z(F02) ≥ 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(F02) ≥ 3σ(F02) = 390, Z(Var) = 14. Die Verbindungen kristallisieren im K3Cu3P2-Typ. Die Au—Sb-Teilstruktur besteht aus ∞2[AuSb2/3]-Schichten mit linearen Sb—Au—Sb-Hanteln und SbAu3-Pyramiden. Die Schichten werden längs [001] durch zwei kristallographisch unterschiedliche Alkalimetallatome separiert.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1173-1176 
    ISSN: 0044-2313
    Keywords: Sodium auride germanide ; synthesis ; single-crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: NaAuGe, a Further Ternary Auride with Ethane Analogous Ge2Au6 Building UnitsBlack, 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(Fo2) ≥ 2σ(Fo2) = 811 and N(var.) = 21.NaAuGe crystallizes in a new ternary variant of the KHg2 (CeCu2)structure type. Gold and germanium form puckered ∞2[AuGe3/3] layers with trigonal planar coordinated gold. The ∞2[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].
    Notes: Schwarze, spröde Einkristalle von NaAuGe wurden durch Umsetzung von NaN3, Goldschwamm und Germanium bei 800°C erhalten. Die Struktur wurde aus Röntgen-Einkristall-Diffraktometerdaten bestimmt: Raumgruppe Imm2, Z = 4, a = 4,422(1) Å, b = 7,238(2) Å, c = 7,531(2) Å, R1/wR2 = 0,0195/0,0482, Z(Fo2) ≥ 2σ(Fo2) = 811 and Z(Var.) = 21.NaAuGe kristallisiert in einer neuen ternären Variante des KHg2 (CeCu2)-Typs. Gold und Germanium bilden stark gewellte ∞2[AuGe3/3]-Netze mit trigonal planar koordiniertem Gold. Die ∞2[AuGe3/3]-Netze werden über Ge - Ge-Kontakte die aus ethan-analogen Ge2Au6-Baueinheiten bestehen, entlang [010] zu einer Gerüststruktur verbunden. Natrium befindet sich in Kanälen der Au - Ge-Gerüststruktur, die längs [100] und [010] verlaufen.
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  • 7
    ISSN: 0044-2313
    Keywords: Hexaammine metal(II) halides, [M(NH3)6]X2 ; single crystal structure determinations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Structures of some Hexaammine Metal(II) Halides of 3 d Metals: [V(NH3)6]I2, [Cr(NH3)6]I2, [Mn(NH3)6]Cl2, [Fe(NH3)6]Cl2, [Fe(NH3)6]Br2, [Co(NH3)6]Br2 and [Ni(NH3)6]Cl2Crystals of yellow [V(NH3)6]I2 and green [Cr(NH3)6]I2 were obtained by the reaction of VI2 and CrI2 with liquid ammonia at room temperature. Colourless crystals of [Mn(NH3)6]Cl2 were obtained from Mn and NH4Cl in supercritical ammonia. Colourless transparent crystals of [Fe(NH3)6]Cl2 and [Fe(NH3)6]Br2 were obtained by the reaction of FeCl2 and FeBr2 with supercritical ammonia at 400°C. Under the same conditions orange crystals of [Co(NH3)6]Br2 were obtained from [Co2(NH2)3(NH3)6]Br3. Purple crystals of [Ni(NH3)6]Cl2 were obtained by the reaction of NiCl2 · 6H2O and NH4Cl with aqueous NH3 solution. The structures of the isotypic compounds (Fm3m, Z = 4) were determined from single crystal diffractometer data (see “Inhaltsübersicht”).All compounds crystallize in the K2[PtCl6] structure type. In these compounds the metal ions have high-spin configuration. The orientation of the dynamically disordered hydrogen atoms of the ammonia ligands is discussed.
    Notes: Durch Umsetzungen von VI2 und CrI2 mit flüssigem Ammoniak bei Raumtemperatur wurden gelbe Kristalle von [V(NH3)6]I2 bzw. grüne von [Cr(NH3)6]I2 erhalten. Farbloses [Mn(NH3)6]Cl2 wurde durch Umsetzung von Mn mit NH4Cl in überkritischem Ammoniak einkristallin dargestellt. Farblose und transparente Kristalle von [Fe(NH3)6]Cl2 und [Fe(NH3)6]Br2 konnten durch Umsetzung von FeCl2 bzw. FeBr2 in überkritischem Ammoniak bei 400°C erhalten werden. Wird unter den gleichen Bedingungen Tri-μ-amido-bis[triammincobalt(III)]-bromid mit Ammoniak umgesetzt, so entstehen u.a. orangefarbene Kristalle von [Co(NH3)6]Br2. Violette Einkristalle von [Ni(NH3)6]Cl2 wurden durch Umsetzung von NiCl2 · 6 H2O mit NH4Cl in wäßriger NH3-Lösung erhalten.Die Strukturen der isotypen Verbindungen [M(NH3)6]X2 (Fm3m, Z = 4) wurden aus Röntgen-Einkristall-Diffraktometerdaten bestimmt: Alle Verbindungen kristallisieren im K2[PtCl6]-Typ. Die Zentralatome liegen in den oktaedrischen Komplexen in high-spin Konfiguration vor. Die Orientierung der dynamisch fehlgeordneten Wasserstoffatome der Ammoniakliganden wird diskutiert.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 1581-1586 
    ISSN: 0044-2313
    Keywords: Sodium auride indide ; gold indium cluster framework ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Na8Au11In6: a Gold Indium Polyhedra Framework with Pentagonal Bipyramidal AuAu5In Building UnitsSilver coloured, brittle single crystals of a hitherto unknown Na8Au11In6 were synthesized by the reaction of NaN3, indium and gold sponge at 500°C. The structure was determined from X-ray single-crystal diffractometry data: space group Pbcm, Z = 4, a = 5.483(1) Å, b = 25.663(2) Å, c = 15.046(5) Å, R1/wR2 = 0.036/0.087, Z(Fo2) = 3σ(Fo2) = 2584 and N(var.) = 125.Na8Au11In6 crystallizes in a new structure type. The gold indium partial structure contains tetrahedral [Au2AuIn]T and pentagonal bipyramidal [AuAu5In]PBP building units which are connected to a three-dimensional framework via Au In exo-bonds and bridging gold and indium atoms. The interconnection pattern of the polyhedra is described by the formula [Au2AuIn]TIn4/2i-iAu2aIn2a [AuAu5In]PBP according to the notation for transition metal clusters. The sodium atoms are placed in channel like cavities within the gold indium partial structure, which run along [100]. Structural relationships between Na8Au11In6 and Friauf Laves phases are discussed.
    Notes: Silberfarbene, spröde Einkristalle eines bislang unbekannten Na8Au11In6 wurden durch Umsetzung von NaN3, Indium und Goldschwamm bei 500°C erhalten. Die Struktur wurde aus Röntgen-Einkristall-Diffraktometerdaten bestimmt: Raumgruppe Pbcm, Z = 4, a = 5,483(1) Å, b = 25,663(2) Å, c = 15,046(5) Å R1/wR2 = 0,036/0,087, Z(Fo2) = 3σ(Fo2) = 2584 and Z(Var.) = 125.Na8Au11In6 kristallisiert in einem neuen Strukturtyp. Die Gold-Indium-Teilstruktur enthält tetraedrische [Au2AuIn]T- und pentagonal bipyramidale [AuAu5In]PBP-Baueinheiten, die über Au-In-exo-Bindungen und verbrückende Au- und In-Atome zu einem 3D-Polyedergerüst verbunden werden. Das Verknüpfungsmuster der Polyeder wird nach der Notation für Übergangsmetallcluster als [Au2AuIn]TIn4/2i-iAu2aIn2a [AuAu5In]PBP beschrieben. Die Natriumatome befinden sich in Kanälen der Au-In-Teilstruktur, die entlang [100] verlaufen. Strukturelle Beziehungen zwischen Na8Au11In6 und Friauf-Laves-Phasen werden diskutiert.
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  • 9
    ISSN: 0044-2313
    Keywords: Ditetraammine lithium tetraphenyldistannide ; synthesis ; single-crystals ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 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 (F02 ≥ 4σF02) = 5.13%, wR2 (F02 ≥ 4σF02) = 10.5%, N(F02 ≥ 4σF02) = 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].
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 1621-1624 
    ISSN: 0044-2313
    Keywords: Sodium auride thallide ; gold chains ; thallium dumb-bells, synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Na4AuTl, the First Ternary Compound in the System Sodium/Gold/ThalliumSilver 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: \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm space}\,{\rm group}\,{\rm Fmmm,}\,{\rm Z = 8,}\,{\rm a = 5}{\rm .453(1)}\mathop {\rm A}\limits^ \circ,\,{\rm b = 10}{\rm .006(2)}\,\,\mathop {\rm A}\limits^ \circ,\,{\rm c = 23}{\rm .387(5)}\,\mathop {\rm A}\limits^ \circ $$\end{document} Na4AuTl crystallizes in a new structure type with separated gold and thallium partial structures. These consist of linear ∞1[Au2/2] chains and [Tl2] dumb-bells. Structural relationships between Na2Au and the Na Au partial structure of Na4AuTl are discussed.
    Notes: Silberfarbene, spröde Einkristalle eines bislang unbekannten Na4AuTl wurden durch Umsetzung von NaN3, Goldschwamm und TlN3 bei 773 K erhalten. Die Struktur wurde aus Röntgen-Einkristall-Diffraktometerdaten bestimmt: \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Raumgruppe}\,{\rm Fmmm,}\,{\rm Z = 8,}\,{\rm a = 5,453(1)}\mathop {\rm A}\limits^ \circ,\,{\rm b = 10,006(2)}\,\,\mathop {\rm A}\limits^ \circ,\,{\rm c = 23,387(5)}\,\mathop {\rm A}\limits^ \circ $$\end{document} Na4AuTl kristallisiert in einem neuen Strukturtyp mit voneinander separierten Gold- und Thallium-Teilstrukturen, die aus linearen ∞1[Au2/2]-Ketten und [Tl2]-Hanteln aufgebaut sind. Strukturbeziehungen zwischen Na2Au und der Na—Au-Teilstruktur von Na4AuTl werden diskutiert.
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