ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 197. Octa-tert-butyldodecaphosphane (8), P12(t-Bu)8 - Preparation and Structure Determination of Two Constitutional Isomers by Nuclear Magnetic ResonanceOcta-tert-butyldodecaphosphane(8) (1) has been obtained by thermolysing P6(t-Bu)4 and has been isolated in pure form. In addition, other tert-butylphosphanes, mainly P8(t-Bu)6 and P9(t-Bu)3, are formed. Compound 1 is produced as a mixture of two constitutional isomers 1a and 1b of comparable abundance, which could be separated by chromatography. According to the 2D-31P{1H}-NMR spectrum, 1a is 2,4,6,7,8-penta-tert-butyl-3-(2,3,4-tri-tert-butylcyclotetraphosphanyl)bicyclo[3.3.0]octaphosphane and 1b is the isomer with the cyclotetraphosphanyl substituent in the 2 position. In both cases, the P12(8) skeleton consists of a P8(6) partial structure analogous to that of pentalane and a monocyclic P4(4) partial structure which are linked through a σ-bond.
    Notes: Octa-tert-butyl-dodecaphosphan(8) (1) wurde durch Thermolyse von P6(t-Bu)4 neben anderen tert-Butylphosphanen, vor allem P8(t-Bu)6 und P9(t-Bu)3, gewonnen und analysenrein isoliert. Verbindung 1 entsteht als Gemisch von zwei Konstitutionsisomeren 1a und 1b annähernd gleicher Häufigkeit, die chromatographisch getrennt werden konnten. Nach dem 2D-31P{1H}-NMR-Spektrum handelt es sich bei 1a um 2,4,6,7,8-Penta-tert-butyl-3-(2,3,4-tri-tert-butylcyclotetraphosphanyl)bicyclo[3.3.0]octaphosphan, bei 1b um das Isomer mit dem Cyclo-tetraphosphanyl-Substituenten in 2-Position. In beiden Fällen besteht das P12(8)-Gerüst aus einem Pentalan-analogen P8(6)- und einem monocyclischen P4(4)-Teilgerüst, die über eine σ-Bindung verknüpft sind.
    Additional Material: 4 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...