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  • 1
    ISSN: 0044-2313
    Keywords: 2,4,6,8,9,10-Hexahydrogen-1,3,5,7-tetraisopropyl-2,4,6,8,9,10-hexaphospha-1,3,5,7-tetrasilatricyclo[3.3.1.13,7]decane ; P-functionalized tetrasilahexaphosphaadamantane ; silaphosphaadamantane ; polycyclic silaphosphanes ; configurational isomers of polycyclic silaphosphanes ; inversion of phosphorus in silaphosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 214. (i-PrSi)4(PH)6 - A P-functionalized TetrasilahexaphosphaadamantaneThe reaction of i-PrSiCl3 with LiAl(PH2)4 yields the compound (i-PrSi)4(PH)6 (1), which has been isolated in pure form. According to NMR spectroscopic investigations and an X-ray single-crystal analysis, 1 is 2,4,6,8,9,10-hexahydrogen-1,3,5,7-tetraisopropyl-2,4,6,8,9,10-hexaphospha-1,3,5,7-tetrasilatricyclo[3.3.1.13,7] decane and thus the first P-functionalized tetrasilahexaphosphaadamantane. Compound 1 exists as a mixture of four diastereomers, which are in equilibrium by inversion of the P atoms. The compound crystallizes tetragonally in the space group I41/a with a = 11,877 Å, c = 18,032 Å and Z = 4. The main structural feature is an adamantan-like molecule. The average bond length is d(Si—P) = 2,244(3) Å. The geometry of the substituent i-Pr on Si is quite normal.
    Notes: Bei der Reaktion von i-PrSiCl3 mit LiAl(PH2)4 entsteht unter geeigneten Bedingungen die Verbindung (i-PrSi)4(PH)6 (1), die in reiner Form isoliert werden konnte. Nach kernresonanzspektroskopischen Untersuchungen und einer Kristallstrukturanalyse handelt es sich bei 1 um 2,4,6,8,9,10-Hexahydrogen-1,3,5,7-tetraisopropyl-2,4,6,8,9,10-hexaphospha-1,3,5,7-tetrasilatricyclo[3.3.1.13,7]decan und damit das erste P-funktionelle Tetrasila-hexaphospha-adamantan. Verbindung 1 liegt als Gemisch von vier Diastereomeren vor, die durch Inversion der P-Atome miteinander im Gleichgewicht stehen. Die Verbindung kristallisiert in der tetragonalen Raumgruppe I41/a mit a = 11,877 Å, c = 18,032 Å und Z = 4. Wesentliches Strukturelement ist ein Adamantan-analoges Molekül. Die gemittelte Bindungslänge beträgt d(Si—P) = 2,244 (3) Å. Die Geometrie des Substituenten i-Pr am Si ist normal.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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