Three-membered boron–nitrogen heterocycles: amino derivatives of 1,2-diaza-3-boririne and 1-aza-2,3-diboririne
Abstract
N.m.r. evidence for the novel 1-butyl-2,3-bis-(2,2,6,6-tetramethylpiperidino)-1-aza-2,3-diboririne (3) and 1,2-di-isopropyl-3-(2,2,6,6,-tetramethylpiperidino)-1,2-diaza-3-boririne (6) suggests a 2π-electron system for (3) and nonplanar nitrogen atoms in (6).