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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 207-212 
    ISSN: 0044-2313
    Keywords: 3,5,7-Trilithiumoxido-tricyclo[2.2.1.02,6]heptaphosphane ; 5-Hydrogen-3,7-dilithiumoxido-tricyclo[2.2.1.02,6]heptaphosphane ; Trilithium Heptaphosphide ; Lithium Pentaphosphacyclopentadienide ; Heptaphosphanortricyclenes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 233. Li3P7O3 and Li2HP7O2 - the First Oxido Heptaphosphanes(3)The novel oxido heptaphosphanes(3) Li3P7O3 (1) and Li2HP7O2 (2) have been obtained by the reaction of trilithium heptaphosphide with cumene hydroperoxide. The compounds 1 and 2 are also formed from lithium pentaphosphacyclopentadienide and cumene hydroperoxide. They are sensitive to oxidation and are pale yellow solids whose structures have been elucidated by means of NMR and IR spectroscopic investigations. In each case, the oxygen atoms are bonded as lithiumoxido groups exocyclically to the heptaphosphanortricyclene skeleton.
    Notes: Die Reaktion von Trilithium-heptaphosphid mit Cumolhydroperoxid führt unter geeigneten Bedingungen zu den neuen Oxido-heptaphosphanen(3) Li3P7O3 (1) und Li2HP7O2 (2). Die Verbindungen 1 und 2 werden auch aus Lithium-pentaphosphacyclopentadienid und Cumolhydroperoxid gebildet. Es sind oxydationsempfindliche, blaßgelbe Feststoffe, deren Struktur durch NMR- und IR-spektroskopische Untersuchungen ermittelt wurde. Die Sauerstoffatome sind jeweils exocyclisch als Lithiumoxido-Gruppen an das Heptaphosphanortricyclen-Gerüst gebunden.
    Additional Material: 2 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 2070-2076 
    ISSN: 0044-2313
    Keywords: 3,5,7-Trilithiumsulfido-tricyclo[2.2.1.02,6]heptaphosphane ; 5-Hydrogen-3,7-dilithiumsulfido-tricyclo[2.2.1.02,6]- heptaphosphane ; Trilithium heptaphosphide ; Lithium pentaphosphacyclopentadienide ; Heptaphosphanortricyclenes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 231. Li3P7S3 and Li2HP7S2  -  the First Sulfido Heptaphosphanes(3)The novel sulfido heptaphosphanes(3) Li3P7S3 (1) and Li2HP7S2 (2) have been obtained by the reaction of Li3P7 with sulfur in tetrahydrofuran under suitable conditions. The compounds 1 and 2 are also formed from LiP5 and sulfur and are only stable in solution below room temperature. According to a complete analysis of the 31P{1H}-NMR spectra, in each case, the sulfur atoms are bonded as sulfido groups exocyclically to the heptaphosphanortricyclene skeleton. Compound 2 reacts with chloro(trimethyl)silane or acetylacetone at one of the two sulfido groups while compound 1 does not form any product with retention of the P7(3) framework.
    Notes: Die Reaktion von Li3P7 mit Schwefel in Tetrahydrofuran führt unter geeigneten Bedingungen zu den neuen Sulfido-heptaphosphanen(3) Li3P7S3 (1) und Li2HP7S2 (2). Die Verbindungen 1 und 2 werden auch aus LiP5 und Schwefel gebildet und sind nur in Lösung unterhalb Raumtemperatur beständig. Nach einer vollständigen Analyse der 31P{1H}-NMR-Spektren sind die Schwefelatome jeweils exocyclisch als Sulfidogruppen an das Heptaphosphanortricyclen-Gerüst gebunden. Mit Chlor(trimethyl)silan oder Acetylaceton reagiert 2 an einer der beiden Sulfidogruppen, während 1 keine Produkte unter Erhalt des P7(3)-Gerüstes bildet.
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  • 3
    ISSN: 0044-2313
    Keywords: Tetraisopropyldodecaphosphane(4) ; 3,4,9,10-Tetraorganylpentacyclo-[6.4.O.O2,6.O5,12.O7,11]dodecaphosphanes ; Organylpolycyclophosphanes ; Configurational Isomers of Polycyclic Phosphanes ; Inversion of Phosphorus in Polycyclic Phosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 212. Tetraisopropyldodecaphosphane(4), P12i-Pr4 - Preparation, Properties, and Molecular DynamicsAccording to an earlier crystal structure analysis, tetraisopropyldodecaphosphane(4) (1) exhibits the symmetry C2, and the substituents are arranged in all-trans position [3]. We have now found by NMR spectroscopic studies that in solution a second configurational isomer of the symmetry CS (1b) exists in addition to the molecule present in the crystal (1a). The transformation of 1a into 1b, which can only occur through a quasi synchronous inversion at the atoms P3 and P4 or P9 and P10, takes place at a noticeable rate already below room temperature.
    Notes: Tetraisopropyl-dodecaphosphan(4) (1) weist nach einer früheren Kristallstrukturanalyse die Symmetrie C2 mit all-trans-Anordnung der Substituenten auf [3]. Durch kernresonanzspektroskopische Studien konnte jetzt in Lösung neben dem im Kristall vorliegenden Molekül (1a) ein zweites Konfigurationsisomer der Symmetrie CS (1b) aufgefunden werden. Die Umwandlung von 1a in 1b, die nur durch quasi-synchrone Inversion an den Atomen P3 und P4 oder P9 und P10 erfolgen kann, läuft bereits unterhalb Raumtemperatur mit merklicher Geschwindigkeit ab.
    Additional Material: 3 Ill.
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