Synthesis and deprotonation of P–H-functionalised phosph(iii)azanes; borohydride dependency on the formation of cis- or trans-[HP(μ-NtBu)2PNtBuH]

Abstract

The reaction of [ClP(μ-N^tBu)₂PN^tBuH] (1) with LiB^sBu₃H yields trans-[HP(μ-N^tBu)₂PN^tBuH] (2), by contrast, reaction with LiBEt₃H yields cis-[HP(μ-N^tBu)₂PN^tBuH] (3). Compounds 2 and 3 represent the first examples of P–H-functionalised cyclophosph(III)azanes. Deprotonation of 2 with BnNa (Bn = benzyl) gives the first example of a secondary phosphine-functionalised cyclodiphosph(III)azane anion [HP(μ-N^tBu)₂PN^tBu]⁻ (4).