Two compounds containing planar six-membered B4O2 rings have been synt
hesized and characterized by X-ray crystallography, namely [B4O2(OH)(4
)].[NH2Me2][Cl] and [B4O2(dab)(2)] (dab = 1,4-Bu-t-1,4-diazabutadiene)
, the former compound providing a model for one possible structure of
boron monoxide. {BO}(x). (C) 1997 Elsevier Science Ltd.