Beiträge zur Chemie des Phosphors, 125/Synthese und Struktur der Triorganyl-nonaphosphane(3) P9(i-Pr)3 und P9 (t-Bu)3

Abstract

Abstract The triorganyl-nonaphosphanes(3) P9(i-Pr)3 (1) and P9(t-Bu)3 (2) have been obtained by reacting (i-PrP)4 with PCl3 and by dehalogenating a mixture of t-BuPCl2 and PCl3 with magnesium, respectively. In the case of P9Et3 (3) and P9Me3 (4) the latter reaction may be modified by using the organyl-cyclophosphanes (PR)n instead of RPCl2. P7R3 as well as other polycyclic organylphosphanes are formed as by-products. 1 could be isolated in pure form and 2 has been concentrated in the product mixture. According to their 31P{1H}-NMR spectra 1-4 possess a P9 skeleton analogous to that of the hydrocarbon deltacyclane. 1 and 2 are formed as mixtures of two configurational isomers, which differ in the spatial arrangements of the substituent on P5. The results clearly indicate, that the corresponding phosphorus hydride P9H3 has the same structure and is a tetracyclo[4.3.0.02,4.03,7]nonaphosphane.