Beiträge zur Chemie des Phosphors. 245 [1], LiP7(BNEt2)2 und P7(BNEt2)4Cl: Zwei neuartige polycyclische BoraphosphaneProfessor Dieter Naumann zum 60. Geburtstag gewidmet

Abstract

The directed synthesis of a noval tetracyclic heteropolyphosphane skeleton from a tricyclophosphane has been achieved by condensation of Li 3 P 7 · 3DME with Cl(Et 2 N)B-B(NEt 2 )Cl to the diboranonaphosphanide LiP 7 (BNEt 2 ) 2 (1). When the reaction proceeds the mixed-substituted diboranonaphosphane P 7 (BNEt 2 ) 4 Cl (2) is formed. According to their 31 P NMR spectra 1 and 2 possess a B 2 P 7 (3) skeleton analogous to that of the hydrocarbon deltacyclane. Additional weak signals in the 31 P NMR spec-