Beiträge zur Chemie des Phosphors, 126. Tris(tert-butylphosphino)-phosphan, P(t-BuPH)3 - ein teilsubstituiertes Derivat von iso-P4H6/ Contributions to the Chemistry of Phosphorus, 126. Tris(tert - butylphosphino)phosphane, P(t-BuPH)3 - a Partially Substituted Derivative of iso-P4H6

Abstract

Abstract The reaction of tris(bromo-tert-butylphosphino)phosphane, P(t-BuPBr)3, with lithium aluminium hydride leads to the title compound P(t-BuPH)3 (1), which could be isolated in a pure state. 1 is the first partially substituted derivative of iso-tetraphosphane(6), P(PH2)3, and was characterized in all details. Because of the chirality of the Z-BuPHgroups, 1 forms two diastereomers with RRS(SSR)- and RRR(SSS)-configuration in a ratio of about 3:1. The conformation of both isomers, which could be deduced from the 31P NMR parameters, is mainly determined by the steric situation of the molecule.