Ambiphilic boron in 1,4,2,5-diazadiborinine

Abstract

Boranes are archetypal Lewis acids owing to an empty p-orbital on the boron, although Lewis basic tricoordinate boranes have been developed too. Here, the authors report an annulated 1,4,2,5-diazadiborinine derivative with boron atoms that exhibit both Lewis acidic and basic properties.