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  • Chemistry  (4)
  • Wiley-Blackwell  (4)
  • 1985-1989  (4)
  • 1960-1964
  • 1985  (4)
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  • Wiley-Blackwell  (4)
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  • 1985-1989  (4)
  • 1960-1964
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  • 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. 157. Dilithium Hexadecaphosphide, Li2P16: Preparation from Li2HP7 and Structure Determination by 31P-NMR Spectroscopy.Dilithium hexadecaphosphide, Li2P16 (1), is purely obtained as a crystalline solvent adduct Li2P16 · 8 THF by the disproportionation of Li2HP7 in tetrahydrofuran under suitable conditions. The constitution of 1 has been deduced from its 1D- and 2D-31P-NMR spectrum (in dimethylformamide). The structure of the P162- ion in solution is identical with that in solid (Ph4P)2P16 [20]. As a conjuncto-phosphane the P162- is made up of two P9(3)⊖-unit groups analogous to deltacyclane, which are linked via the diatomic bridges as a common zero-bridge.
    Notes: Dilithium-hexadecaphosphid, Li2P16 (1), wird bei der Disproportionierung von Li2HP7 in Tetrahydrofuran unter geeigneten Bedingungen als kristallines Lösungsmitteladdukt Li2P16 · 8 THF rein erhalten. Die Konstitution von 1 wurde aus dem 1D- und 2D-31P-NMR-Spektrum (in Dimethylformamid) abgeleitet. Das P162--Ion hat in Lösung die gleiche Struktur wie in festem (Ph4P)2P16 [20]. Es ist als Konjunkto-Phosphan aus zwei P9(3)⊖-Teilgerüsten mit Deltacyclananaloger Struktur aufgebaut, die über die Zweierbrücke als gemeinsame Nullbrücke miteinander verbunden sind.
    Additional Material: 3 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 522 (1985), S. 184-188 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions tot he Chemistry of Phosphorus. 148. Synthesis and Properties of the 1,2-Diphospha-3,4-diboretane (t-BuP)2(BNMe2)2The first 1, 2-diphospha-3,4-diboretane (1,2-diphospha-3, 4-diboracyclobutane) (t-BuP)2(BNMe2)(1) was prepared by [2+2] cyclocondensation of K(t-Bu)P—P(t-Bu)K with Cl(Me2N)B—B(NMe2)Cl.1 could be isolated in the pure state and was NMR spectroscopically characterized as a compound with a planar P2 B2 ring skeleton.
    Notes: Das erste 1,2-Diphospha-3,4-diboran (1,2-Diphospha-3,4-dibora-cyclo-butan) (t-BuP)2(BNMe2)2 (1) wurde durch [2+2]-Cyclokondensation von K(t-Bu)P—P(t-bu)K mit Cl(Me2N)B—B(NMe2)Cl dargestellt. 1 konnte in reiner Form isoliert und kernresonanzspektroskopisch als Verbindung mit planarem P2B2-Ringgerüst charakterisiert werden.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 526 (1985), S. 7-14 
    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. 151. Dilithium Dihydrogen Tetradecaphosphide, Li2H2P14: Preparation and Structural CharacterizationDilithium dihydrogentetradecaphosphide, Li2H2P14 (1), is obtained as an orange-red solvent adduct Li2H2P14 · 6 THF in a purity of 80-90 per cent by reacting P2H4 with n-BuLi under suitable conditions. 1 is also formed in the reaction of Li3P7 or LiH4P5 with P2H4, and in the disproportionation of LiH4P7. According to its 2D-31P-NMR spectrum 1 is a conjuncto-phosphane built up by one P7(5)⊖- and one P9(3)⊖-unit group with structures analogous to norbornane and delta-cyclane, respectively.
    Notes: Dilithium-dihydrogentetradecaphosphid, Li2H2P14 (1), wird durch Metallierung von P2H4 mit n-BuLi unter geeigneten Bedingungen als orangerotes Lösungsmitteladdukt Li2H2P14 · 6 THF in 80 bis 90proz. Reinheit erhalten. 1 entsteht außerdem bei der Reaktion von Li3P7 oder LiH4P5 mit P2H4 und bei der Disproportionierung von LiH4P7. Entsprechend dem 2D-31P-NMR-Spektrum ist 1 als Konjunkto-Phosphan aus einem P7(5)⊖- und einem P9(3)⊖-Teilgerüst mit Norbornan- bzw. Deltacyclan-analoger Struktur aufgebaut.
    Additional Material: 2 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 528 (1985), S. 7-21 
    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. 152. Functionalized Cyclotriphosphanes of the Type (t-BuP)2PX (X = K, SiMe3, SnMe3, Cl, Br, PCl2, P(t-Bu)Cl, P(t-Bu)I)Functionalized cyclotriphosphanes of the type (t-BuP)2PX with electropositive or electronegative substituents X have been prepared on various synthetic routes: KP(t-BuP)2 (1) can be obtained in 50-55 per cent purity by reacting (t-BuP)4 or (t-BuP)3 with potassium. Reaction of 1 with Me3SiCl or Me3SnCl leads to the cyclotriphosphanes (t-BuP)2PSiMe3 (2) and (t-BuP)2PSnMe3 (3), respectively; the cyclocondensation of Cl(t-Bu)P—P(t-Bu)Cl with P(SnMe3)3, however, is more convenient for the preparation of 3. In a similar way the halogenated compounds (t-BuP)2PCl (4) and (t-BuP)2PBr (5) can be obtained from Me3Sn(t-Bu)P—P(t-Bu)SnMe3 (6) and PX3 (X = Cl, Br). The phosphino-substituted cyclotriphosphanes (t-BuP)2P—PCl2 (7), (t-BuP)2P—P(t-Bu)Cl (8), and (t-BuP)2P—P(t-Bu)I (9) are accessible by the reaction of 3 with PCl3 and t-BuPX2 (X = Cl, I), respectively. 2-9 could be obtained free from phosphorus-containing by-products and were 31P-NMR spectroscopically characterized as compounds with a cyclic P3 skeleton.
    Notes: Funktionalisierte Cyclotriphosphane des Typs (t-BuP)2PX mit elektropositiven oder elektronegativen Substituenten X wurden auf verschiedenen Synthesewegen dargestellt: KP(t-BuP)2 (1) kann durch Reaktion von (t-BuP)4 oder (t-BuP)3 mit Kalium in 50-55proz. Reinheit gewonnen werden. Umsetzung von 1 mit Me3SiCl oder Me3SnCl ergibt die Cyclotriphosphane (t-BuP)2PSiMe3 (2) bzw. (t-BuP)2PSnMe3 (3); doch ist für 3 die Cyclokondensation von Cl(t-Bu)P—P(t-Bu)Cl mit P(SnMe3)3 präparativ günstiger. In entsprechender Weise werden aus Me3Sn(t-Bu)P—P(t-Bu)SnMe3 (6) und PX3 (X = Cl, Br) die halogenierten Verbindungen (t-BuP)2PCl (4) bzw. (t-BuP)2PBr (5) erhalten. Durch Reaktion von 3 mit PCl3 oder t-BuPX2 (X = Cl, I) sind die phosphino-substituierten Cyclotriphosphane (t-BuP)2P—PCl2 (7), (t-BuP)2P—P(t-Bu)Cl (8) bzw. (t-BuP)2P—P(t-Bu)I (9) zugänglich. 2-;9 konnten frei von phosphorhaltigen Nebenprodukten gewonnen und 31P-NMR-spektroskopisch eindeutig als Verbindungen mit P3-Ringgerüst charakterisiert werden.
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