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a-P 9 Et 5  (1) and a-P 9 (i-Pr) 5  (2) have been obtained by reacting a mixture of (PEt) 5  and PC1 3  and of i-PrPCl 2  and P 4 , respectively, with magnesium. Compound 1 has been isolated in 95% purity, whereas 2 has been highly enriched in the product mixture. According to their  31 P{ 1 H}-NMR spectra, 1 and 2 are 2,4,6,8,9-pentaorganyltricyclo[3.3.1.0 3.7 ]nonaphosphanes (a-P 9 R 5 ) containing a P 9  skeleton analogous to that of noradamantane. In addition, small portions of another constitutional isomer with a structure analogous to that of brexane (b-P 9 R 5 ) have been detected.

zeitschrift für naturforschung b

Beiträge zur Chemie des Phosphors, 209 / Contributions to the Chemistry of Phosphorus, 209: Pentaorganyl-nonaphosphane(5) mit Noradamantan-Struktur: a-P 9 Et 5  und a-P 9 (i-Pr) 5  / Pentaorganylnonaphosphanes(5) with a Structure Analogous to Noradamantane: a-P 9 Et 5  and a-P 9 (i-Pr) 5