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  • Inorganic Chemistry  (195)
  • 1990-1994  (195)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 416-420 
    ISSN: 0044-2313
    Keywords: Nonaselenide ; Synthesis ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of the Nonaselenide [Sr(15-crown-5)2]Se9The title compound was prepared by the reaction of excess selenium with strontium diselenide in DMF in the presence of 15-crown-5. [Sr(15-crown-5)2]Se9 forms black crystals, which are soluble in DMF. They were characterized by FIR spectroscopy and by an X-ray structure determination.Space group P21/n, Z = 4, 2 381 observed unique reflections, R = 0.073. Lattice dimensions at 19°C: a = 1 228.7, b = 1 893.4, c = 1 575.7 pm, β = 99.15°. The compound consists of [Sr(15-crown-5)2]2+ ions in which the strontium ion is coordinated by the oxygen atoms of the crown ether molecules in a sandwich-like fashion, and of Se92- ions with a chain structure, which has a topolocical resemblance with the bicyclic ion Se102-.
    Notes: Die Titelverbindung entsteht durch Einwirkung von überschüssigem Selen auf Strontiumdiselenid in Dimethylformamid (DMF) in Gegenwart von 15-Krone-5. [Sr(15-Krone-5)2]Se9 bildet schwarze, in DMF leicht lösliche Kristalle, die durch das FIR-Spektrum und eine röntgenographische Strukturanalyse charakterisiert werden.Raumgruppe P21/n, Z = 4, 2 381 beobachtete unabhängige Reflexe, R = 0,073. Gitterabmessungen bei 19°C: a = 1 228,7; b = 1 893,4; c = 1 575,7 pm, β = 99,15°. Die Verbindung besteht aus [Sr(15-Krone-5)2]2+-Ionen, in denen das Strontiumion sandwichartig von den O-Atomen der beiden Kronenethermoleküle umgeben ist, und kettenförmigen Se92--Ionen, die topologische Verwandtschaft zu dem bicyclischen Se102--Ion aufweisen.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 581 (1990), S. 159-172 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cs2[Li3GaO4]: A Phyllo-Litho-Gallate?For the first time Cs2[Li3GaO4] was obtained via “exchange reaction” from intimate mixtures of Cs2O and Li5[GaO4] (molar ratio Cs2O: Li5[GaO4] 2:1; Pt-tube; 750°C, 8 weeks) in the form of single crystals of irregular shape. The structure elucidation (four circle diffractometer data, AgKα, 622 of 622 I0(hkl), R = 4.36%, Rw = 2.85%) confirms the space group Ibam; a = 500.4(3), b = 1005.1(2), c = 1188.5(3) pm, Z = 4 (Guinier-Simon-data).The crystal structure is built up by layers ∞2[Li3GaO4] consisting of compressed LiO4-and GaO4- disphenoids sharing four vertices and being separated by Cs-layers. This structural motif is occuring for instance in ternary sulphides like Cs2[Zn3S4].Rb2[Li3GaO4] is isotypic with the mentioned oxogallate; it can be prepared from the binary oxides; a = 491.0(1), b = 974.4(1), c = 1142.6(2) pm; Z = 4.
    Notes: Cs2[Li3GaO4] wurde erstmals durch„ Austauschreaktion“ aus Gemengen von Cs2O und Li5[GaO4] (Einwaageverhältnis Cs2O:Li5[GaO4] 2:1; Pt-Rohr; 8 Wochen, 750°C) in Form von unregelmäßig geformten Einkristallen erhalten. Die Strukturaufklärung (Vierkreisdiffraktometerdaten, AgKα, 622 von I0(hkl), R = 4,36%, Rw = 2,85%) belegt die Raumgruppe Ibam; a = 500,4(3), b = 1005,1(2), c = 1188,5(3) pm; Z = 4 (Guinier-Simon-Daten).Die Struktur baut sich aus Schichten ∞2[Li3GaO4] auf, die von vierfach kantenverknüpften, gestauchten LiO4-Disphenoiden gebildet und durch Cs-Schichten verknüpft werden. Dieses Strukturprinzip kennt man von ternären Sulfiden wie Cs2[Zn3S4].Isotyp mit der Titelverbindung ist Rb2[Li3GaO4], das man aus den binären Oxiden in Form von Pulverproben darstellen kann; a = 491,0(1), b = 947,4(1), c = 1142,6(2) pm; Z = 4.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 583 (1990), S. 17-23 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A New Strontium-Oxometallate: Sr9Zn4Cu2O14, Containing Sr2+ in Face Connected OctahedraSingle crystals of Sr9Zn4Cu2O14 were prepared in closed Cu-tubes. Modern X-ray investigations lead to monoclinic symmetry (space group C2h3—C2/m, a = 22.22; b = 3.61; c = 11.29; β = 98.6°; Z = 2). The crystal structure is characterized by a threedimensional Sr/O network, containing Sr2+ in octahedral and trigonal prismatic coordination. The SrO6 octahedra are partly face connected. Incorporated Zn2+ and Cu+ Ions show tetrahedral and dumbbell like coordination.
    Notes: In geschlossenen Cu-Rohren wurden Einkristalle von Sr9Zn4Cu2O14 dargestellt. Moderne Röntgenmethoden führen zu monokliner Symmetrie [Raumgruppe C2h3—C2/m; a = 22,22; b = 3,61; c = 11,29 Å; β = 98,6°, Z = 2]. Die Kristallstruktur enthält ein Sr/O-Gerüst mit Sr2+ in oktaedrischer und trigonal prismatischer Koordination. SrO6-Oktaeder treten partiell flächenverknüpft auf. In das Sr/O-Gerüst sind Zn2+-Ionen in Tetraederlücken und Cu+-Ionen mit hantelförmiger Koordination eingelagert.
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  • 4
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Substituted Phosphaalkenes and Acylphosphanes. 13. On the Reactivity of η3-Phosphaally Complexes towards Pentacarbonyl Chromium Derivates. Synthesis and X-ray Structure Analysis of Z-{(η5-C5Me5)(CO)2Fe—CH=P[Cr(CO)5]CH(SiMe3)2}The reaction of in situ generated (η5-C5Me5)(CO)Fe{η3-[(Me3Si)2CH]—PCH=CO} (3) with photochemically prepared (Z-cyclooctene)Cr(CO)5 yields the phosphaalkenyl complex Z-{(η5-C5Me5)(CO)2Fe—CH=P[Cr(CO)5]CH(SiMe3)2} (5). Constitution and configuration of 5 in the crystal were elucidated by x-ray analysis.
    Notes: Bei der Reaktion von in situ gebildetem (η5-C5Me5)(CO)Fe{η3[(Me3Si)2CH]—PCH=CO} (3) mit photochemisch frisch hergestelltem (Z-Cycloocten)Cr(CO)5 wird der Phosphaalkenyl-Komplex Z-{(η5-C5Me5)(CO)2Fe—CH=P[Cr(CO)5]CH(SiMe3)2} (5) gebildet. Konstitution und Konfiguration von 5 wurden durch Röntgen-Strukturanalyse an kristallinem 5 ermittelt.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 583 (1990), S. 205-208 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Correction of the Crystal Structures of CaMnF5 and CdMnF5CaMnF5 and CdMnF5, previously assumed to crystallize with different space groups (P2/c and P21/n, respectively), both belong to the CaCrF5 type in the space group C2/c. The observed violation of the extinction laws for C centering in the X-ray diagrams is due to twinning. In both cases, all manganese atoms are symmetry-equivalent. After a new refinement with the original data certain discrepancies between chemically equivalent bond lengths are eliminated.
    Notes: Anders als bislang angenommen, kristallisieren CaMnF5 und CdMnF5 nicht mit verschiedenen Raumgruppen (P2/c bzw. P21/n), sondern im CaCrF5-Typ mit der Raumgruppe C2/c. Die in den Röntgendiagrammen beobachtete Verletzung des Auslöschungsgesetzes für die C-Zentrierung ist auf Verzwillingung zurückzuführen. Alle Manganatome sind jeweils symmetrie-äquivalent. Nach einer neuen Verfeinerung mit den Originaldaten entfallen gewisse Abweichungen zwischen kristallchemisch äquivalenten Bindungsabständen.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 584 (1990), S. 7-11 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Compounds of the Ba8Pt4Y3O17.5-Type: Ba8Pt4Ln3O17.5 · (Ln = Er, Yb, Tm)The hitherto unknown compounds (I):Ba8Pt4Er3O17.5, (II): Ba8Pt4Yb3O17.5 and (III): Ba8Pt4Tm3O17.5 were prepared and investigated by single crystal X-ray technique. They crystallize with cubic symmetry; space group Oh1-Pm3m, Z = 1. (I): a = 8.3441 Å; (II): a = 8.3145 Å; (III): a = 8.3296 Å. Pt4+ and Ln3+ ions show an octahedral and Pt2+ ions a planar coordination by oxygen. A typical feature of the crystal structure is an unoccupied space in the middle of the unit cell.
    Notes: Die bisher unbekannten Verbindungen (I): Ba8Pt4Er3O17,5, (II): Ba8Pt4Yb3O17,5 und (III): Ba8Pt4Tm3O17,5 wurden einkristallin dargestellt und röntgenographisch untersucht. Sie gehören zur Raumgruppe Oh1-Pm3m (I): a = 8,3441 Å; (II): a = 8,3145 Å; (III): a = 8,3296 Å; Z = 1. In diesen Verbindungen sind Pt4+- und Ln3+-Ionen oktaedrisch und Pt2+-Ionen planar durch Sauerstoff koordiniert. Die Kristallstruktur zeichnet sich durch einen Hohlraum in der Mitte der Elementarzelle aus.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 584 (1990), S. 114-118 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About Ba6La2Co4O15Ba6La2Co4O15 were prepared and investigated by X-ray single crystal work. It crystallizes with hexagonal symmetry, space group C6v4-P63mc; a = 11.8082; c = 7.0019 Å; Z = 2. Ba2+ show face connected BaO6-octahedra and larger polyhedra of C.N. = 10 and 12. Co3+ is surrounded by four and six (tetrahedra, octahedra) oxygen. The Ba2+ and La3+ ions occupy one point position statistically.
    Notes: Ba6La2Co4O15 wurde dargestellt und an Einkristallen mit Röntgenbeugungsmethoden untersucht. Diese Verbindung kristallisiert hexagonal in der Raumgruppe C6v4-P63mc mit a = 11,8082; c = 7,0019 Å; Z = 2. Ba2+ zeigt flächenverknüpfte BaO6-Oktaeder und große Polyeder mit C.N. = 10 und 12. Co3+ ist oktaedrisch und tetraedrisch durch O2- koordiniert. La3+ besetzt mit Ba2+ eine Punktlage statistisch.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 584 (1990), S. 119-124 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Contribution about BaLaGaO4 and BaNdGaO4: β-K2SO4 Type Related Compounds and about SrLaGaO4 with K2NiF4 Structure(I) BaLaGaO4, (II) BaNdGaO4, and (III) SrLaGaO4 were prepared by solid state reactions and investigated by X-ray single crystal technique. (I) and (II) crystallize with a β-K2SO4 type related structure. Ba2+ and La3+/Nd3+ occupy two point positions in an ordered manner, Ga3+ shows a tetragonal coordination. SrLaGaO4 has K2NiF4 structure. Sr2+ and La3+ are distributed statistically, Ga3+ is surrounded by O2--octahedra which are stretched along [001].
    Notes: (I) BaLaGaO4, (II) BaNdGaO4 und (III) SrLaGaO4 wurden mit Feststoff-reaktionen dargestellt und mit Röntgenbeugungsmethoden untersucht. (I) und (II) kristallisieren mit einer zu β-K2SO4 verwandten Struktur. Ba2+ und La3+/Nd3+ besetzen zwei Punktlagen geordnet, Ga3+ hat eine tetragonale Koordination. SrLaGaO4 dagegen zeigt K2NiF4-Struktur. Sr2+ und La3+ sind statistisch verteilt, Ga3+ist von O2- -Oktaedern umgeben, die längs [001] gestreckt sind.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 584 (1990), S. 125-128 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On a New Halogenooxoindate: Ba3In2O5Cl2 with Sr3Ti2O7-StructureBa3In2O5Cl2 was prepared for the first time and investigated by modern X-ray technique. It crystallizes with tetragonal symmetry, space group D4h17-I4/mmm; a = 4.236; c = 24.929 Å; Z = 2. The crystal structure belongs to the Sr3Ti2O7-type. The octahedra-double layers of this type are delimited along [001] with the Cl-ions.
    Notes: Erstmals wurde Ba3In2O5Cl2 dargestellt und mit Röntgenmethoden an Einkristallen untersucht. Es kristallen untersucht. Es kristallisiert tetragonal, Raumgruppe D4h17-I4/mmm mit a = 4,236; c = 24,929 Å, Z = 2. Die Kristallstruktur entspricht dem Aufbau von Sr3Ti2O7. Die Oktaeder-doppelschichten dieses Typs werden längs [001] durch Cl--Ionen begrenzt.
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  • 10
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Characterization of Electrode Materials Based on V2O5 by X-Ray and Photoelectron SpectroscopyThe investigation of various LixV2O5 compounds and V2O5 itself by X-ray and photoelectron spectroscopy resulted in new knowledge about the change of the structure of V2O5 during discharge in positive electrodes of secondary lithium batteries. The structures of the compounds produced by electrochemical reduction of V2O5 in aprotic lithium salt solutions are similar to these received on a chemical way. In the case of overdischarging of LixV2O5 (x 〉 1) the V2p3/2 binding energy is decreased, the change of the lattice becomes irreversible, and the material is after that only uncompletely rechargeable.
    Notes: Durch röntgen- und photoelektronenspektroskopische Untersuchungen an verschiedenen LixV2O5-Verbindungen und an V2O5 wurden weitere Erkenntnisse zur Strukturumwandlung des V2O5 während seiner Entladung in positiven Elektroden von sekundären Lithiumzellen erhalten. Es treten während der elektrochemischen Reduktion des V2O5 in aprotischen Lithiumsalzlösungen ähnliche Strukturen auf wie bei chemisch hergestellten Verbindungen. Im Falle einer Überentladung (x 〉 1) nimmt die V2p3/2-Bindungsenergie ab, die Gitteränderung wird irreversibel und das Material ist danach nur unvollständig wiederaufladbar.
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