The reactivity of N,C,N-intramolecularly coordinated antimony(III) and bismuth(III) oxides with the sterically encumbered organoboronic acid 2,6-i-Pr2C6H3B(OH)2

The reactivity of N,C,N-chelated antimony(III) and bismuth(III) oxides with sterically demanding organoboronic acid 2,6-i-Pr2C6H3B(OH)2 was investigated giving both six- and eight-membered heteroboroxine compounds.