Beiträge zur Chemie des Phosphors. 179. Triisopropyl-undecaphosphan(3), P11(i-Pr)3 – Darstellung,Eigenschaften und Moleküldynamik

Contributions to the Chemistry of Phosphorus. 179. Triisopropyl-undecaphosphane(3), P₁₁(i-Pr)₃ – Preparation, Properties, and Molecular Dynamics Triisopropyl-undecaphosphane(3) ( 1 ) has been obtained by reacting i-PrPCl₂, P₄, and magnesium and subsequently thermolysing the crude reaction product, and has been isolated in pure form. According to a two dimensional ³¹{¹H} n.m.r. spectrum 1 is a 4, 7, 11-triisopropylpentacyclo[6.3.0.0^2,6.0^3,10. 0^5,9]undecaphosphane. Compound 1 is formed as a mixture of two configurational isomers 1a and 1b , which differ from each other in the orientation of the isopropyl groups. When crystallizing pure 1b precipitates, which in solution is retransformed into the isomeric mixture 1a , 1b by inversion of the configuration.