ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Chemistry  (2)
  • 1975-1979  (1)
  • 1970-1974  (1)
Collection
Keywords
Publisher
Years
Year
  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and X-Ray Structure Analysis of the 8π-Electron-Ring-System S4N4O2Sn2(CH3)6 and the Magnetic Properties of S4N4O2 and S8N8O4S4N4O2 reacts with N[Sn(CH3)3]3 in a molar ratio of 1:1 to an eight-membered trimethyltin-substituted 8π-electron skeleton, S4N4O2Sn2(CH3)6. In contrast to known 6π-electronsystems this compound has tin atoms which are tetracoordinated. This was demonstrated on the basis of an x-ray analysis. S4N4O2Sn2(CH3)6 · 1/2 C6H6 crystallizes in the space group P21/c with a = 1396.0(4), b = 1190.3(4), c = 1256.7(3) pm, and β = 103.46(2)°. It was shown that the ability of coordination at the tin atom depends on the electron density. The magnetic properties of S4N4O2 and S8N8O4 were investigated by the Faraday method. The high diamagnetism in these ring compounds is caused by the π-electrons.
    Notes: S4N4O2 reagiert mit N[Sn(CH3)3]3 im Molverhältnis 1:1 zum achtgliedrigen trimethylzinnsubstituierten 8π-Elektronengerüst, S4N4O2Sn2(CH3)6. Im Gegensatz zu bekannten 6π-Elektronensystemen haben in dieser Verbindung die Zinnatome die Koordinationszahl 4. Dies konnte auf Grund einer Röntgenstrukturanalyse ermittelt werden. S4N4O2Sn2(CH3)6 · 1/2 C6H6 kristallisiert in der Raumgruppe P21/c mit a = 1396,0(4), b = 1190,3(4), c = 1256,7(3) pm und β = 103,46(2)°. Es wird gezeigt, daß die Koordinationsfähigkeit am Zinnatom von der Elektronendichte abhängig ist. Das magnetische Verhalten von S4N4O2 und S8N8O4 wurde nach der Faraday-Methode bestimmt. Der gefunden hohe Diamagnetismus in diesen Ringverbindungen wird durch die π-Elektronen verursacht.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 379 (1970), S. 204-212 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The crystal structure of nickel selenate-hexahydrate was refined from X-ray single crystal measurements. The structure is tetragonal, space groupe either P41212 or P4212, with four molecules in the cell with a = b = 6.926 Å, c = 18.414 Å. The distances selenium-oxygen within the tetrahedra are 1.66 Å and 1.64 Å. The bonds within the SeO4 tetrahedra are discussed.
    Notes: Die Kristallstruktur des Nickelselenat-hexahydrats wurde aus Intensitätsmessungen eines Einkristalls verfeinert. Die Struktur ist tetragonal, die Raum-gruppe ist entweder P41212 oder P43212, mit vier Molekülen in der Elementarzelle mit a = b = 6,926 Å, c = 18,414 Å. Die Selen - Sauerstoff-Abstände im Tetraeder betragen 1,66 und 1,64 Å. Die Bindungsverhältnisse im SeO4-Tetraeder werden diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...