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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 617 (1992), S. 31-36 
    ISSN: 0044-2313
    Keywords: 1,2-Di-tert-butyldiphosphane ; 1,2,3-Tri-tert-butyltriphosphane ; Tetra-tert-butylcyclotetraphosphane ; 1-(tert-Butylphosphino)-2,3,4-tritert-butylcyclotetraphosphane ; 1-(1,2-Di-tert-butyldiphosphino)-2,3,4-tri-tert-butylcyclotetraphosbhane ; tert-Butylpolyphosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 224. On the Thermolysis of 1,2-Di-tert-butyldiphosphane, 1,2,3-Tri-tert-butyltriphosphane, and Tetra-tert-butylcyclotetraphosphaneOn disproportionation of 1,2-di-tert-butyldiphosphane, H(t-Bu)P—P(t-Bu)H (1), 1,2,3-tri-tert-butyltriphosphane, H2(t-BuP)3 (2), is formed which reacts further at temperatures above 100°C to give 1-(tert-butylphosphino)-2,3,4-tri-tert-butylcyclotetraphosphan, P5(t-Bu)4H (4). Compound 4 reacts with 1 or 2 with lengthening of the P-sidechain to furnish the corresponding 1-(1,2-di-tert-butyldiphosphino)-2,3,4-tri-tert-butylcyclotetraphosphane, P6(t-Bu)5H (5). At temperatures above 170°C, 5 disproportionates into the tetra-tert-butylcyclotetraphosphane, (t-BuP)4 (3) which is stable up to about 200°C, and the bicyclo[3.1.0]hexaphosphane P6(t-Bu)4 from which the polycyclophosphanes P9(t-Bu)3 and P8(t-Bu)6 arise during the further course of the thermolysis. These products are finally converted through even more phosphorus-rich and more highly condensed t-butylcyclophosphanes into elemental phosphorus. In each reaction step, varying amounts of the monophosphane derivatives t-BuPH2, (t-Bu)2PH, and (t-Bu)3P are formed. The proposed course of the reaction is further substantiated by the pyrolysis products of pure 2 and 3.
    Notes: Bei der Disproportionierung von 1,2-Di-tert-butyldiphosphan, H(t-Bu)P—P(t-Bu)H (1), entsteht 1,2,3-Tri-tert-butyltriphosphan, H2(t-BuP)3 (2), das oberhalb von 100°C zu 1-(tert-Butylphosphino)-2,3,4-tri-tert-butylcyclotetraphosphan, P5(t-Bu)4H (4), weiterreagiert. Verbindung 4 bildet mit 1 oder 2 unter Verlängerung der P-Seitenkette das entsprechende 1-(1,2-Di-tert-butyldiphosphino)-2,3,4-tri-tert-butylcylotetraphospha, P6(t-Bu)5H (5). Bei Temperaturen über 170°C disproportioniert 5 in das bis etwa 200°C beständige Tetra-tert-butylcyclotetraphosphan, (t-BuP)4 (3), und das Bicyclo[3.1.0]hexaphosphan P6(t-Bu)4, aus denen im weiteren Verlauf der Thermolyse die Polycyclophosphane P9(t-Bu)3 und P8(t-Bu)6 entstehen. Diese gehen schließlich über noch phosphorreichere und höherkondensierte tert-Butylcyclophosphane in elementaren Phosphor über. Bei jedem Reaktionsschritt werden wechselnde Mengen der Monophosphanderivate t-BuPH2, (t-Bu)2PH und (t-Bu)3P gebildet. Der angegebene Reaktionsverlauf wird durch die Thermolyseprodukte von reinem 2 und 3 bestätigt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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