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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(PH 2 ) 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  31 P NMR parameters, is mainly determined by the steric situation of the molecule.

zeitschrift für naturforschung b

Beiträge zur Chemie des Phosphors, 126. Tris(tert-butylphosphino)-phosphan, P(t-BuPH) 3  - ein teilsubstituiertes Derivat von iso-P 4 H 6 / Contributions to the Chemistry of Phosphorus, 126. Tris(tert - butylphosphino)phosphane, P(t-BuPH) 3  - a Partially Substituted Derivative of iso-P 4 H 6