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Beiträge zur Chemie des Phosphors, 68 Tri-t-butyl-cyclotriphosphan. : Contributions to the Chemistry of Phosphorus, 68 Tri-t-butyl-cyclotriphosphane

Author:
Baudler, Marianne, Hahn, Josef, Dietsch, Hermann, Fürstenberg, Gabriele
Source:
Zeitschrift für Naturforschung 2014 v.31 no.10 pp. 1305-1310
ISSN:
0932-0776
Subject:
distillation, magnesium, melting point, moieties, molecular weight, nuclear magnetic resonance spectroscopy, phosphorus, stable isotopes
Abstract:
In the reaction of magnesium with trimethylchlorosilane and t-butyldichlorophosphane the hitherto unknown tri-t-butyl-cyclotriphosphane, (t-BuP)₃ (1), is produced besides the partially silylated phosphanes t-BuP(SiMe₃)₂ and (t-BuPSiMe₃)₂ as well as the cyclotetraphosphane (t-BuP)₄. Shortly after the beginning of the reaction the amount of 1 is about 50 mole-% and decreases during the reaction time. Thermally and in solution the P₃ ring compound (1) is surprisingly stable and can be isolated in a pure state by fractional distillation. (t-BuP)₃ clearly differs from the oligomeric (t-BuP)₄ by the lower melting point, the molar mass and by the ³¹P NMR and IR spectra. The t-butyl groups in 1 are situated above and below the P₃ ring plane.
Agid:
5214744