Ein Weg zu neuartigen funktionalisierten Bis(imino)phosphoranen XP( NAryl)NAlkyl

A Route to Novel Functionalized Bis(imino)phosphoranes XP(NAryl)NAlkyl Chloro(arylimino)phosphane (1) reacts with alkyl azides RN3 (R  tBu, Et3C, 1‐Ad) to form 4,5‐dihydro‐1H‐tetrazaphos‐pholes 2a‐c. The thermal decomposition of these compounds results in the formation of the diazadiphosphetidines 4a–c via the chlorobis(imino)phosphorane intermediates 3a–c, which were detected by NMR spectroscopy. By treating 2a with the lithium salts Li(nBu, C5Me5, NHAryl, OAryl, tBuS) the 4,5‐dihydro‐1H‐tetrazaphosphole intermediates 5a–d are obtained, which by elimination of nitrogen form the bis(imino)phosphoranes 6a–e. The X‐ray structure determination of the phosphane derivative tBu2PP(NCEt3) NAryl (7), obtained by the same procedure, is discussed.