Triazaphosphinine – Reaktionen, Zwitterionen, P–B-Austausch/ Triazaphosphinines – Reactions, Zwitter Ions, P – B-Exchange

Abstract

Abstract 2,2-Dichloro-triazaphosphinine (2) reacts with SbF 3 in the molar ratio 3:1 to give the mixed halogenated triazaphosphinine (3). New addition compounds 5 and 6 can be formed in the reaction of the zwitter ion 4 and amines or in the reaction of 2.2-difluoro-triazaphosphinine (1) with KCN. Phosphorus-boron-exchange is observed in the reactions of 4 or 2 with BF 3 · OEt 2 . The new C-B -N-heterocycles 8 and 9 are obtained. The gas-phase structure of 1 has been determined by electron diffraction. The scattering intensities are compatible with a planar ring conformation with C 2v symmetry and with equivalent NC bond lengths (PN = 1.579(10) Å, NC = 1.299(7) Å, NPN = 109.2(7)°, PNC - 118.1(9)°, CNC - 119.6(7)° and NCN = 127.5(12)°).