SILYL-NITROGEN COMPOUNDS,¹ IV: REACTIONS OF PENTASILA-PHOSPHA-PENTAZENE WITH ALCOHOLS AND CARBOXYLIC ACIDS

Abstract

Pentakis(trimethylsilyl)-3-phospha-2-pentazene (Me₃Si)₂N-N(SiMe₃)-P=N-N(SiMe₃)₂ (1) reacts with Me₃COH to form oxidative addition products, the partially desilylated [bis(trimethylsilyl) hydrazino][bis(trimethylsilyl)hydrzono](t-butoxy)phosphorane (2) and the completely desilylated hydrazinohydrazono(t-butoxy) phosphorane ₍₃₎. With CF₃COOH, (1) forms [tris(trimethylsilyl) hydrazino] bis(trimethylsilyl)hydrazono](t-butoxy)phorane (4). (1) and CF₃COOH in the ratio 1:5 produce a partially desilylated oxidative addition product trimethylsilylhydrazino-trimethylsilylhydrazono(trifluoroacetato)phosphorane (5) and a desilylated dimer [H₂N - N - p (OOCCF₃)=N-NH₂]₂ (6). With fluorosulfonic acid, (1) forms tetrakis(trimethylsilyl) tetrazane (Me₃Si)₂N-NH-NH-N(SiMe₃)₂ (7) and a desilylated phosphorane H₂N-NH-P(H) (SO₃F)═N-NH₂ (8). Trifluoromethane sulfonic acid forms a desilylated phosphorane H₂N-NH-P(H)(SO₃CF₃)=N-NH₂ (9).