Radical-Type Reactivity of the 1,3-Dibora-2,4-Diphosphoniocyclobutane-1,3-diyl

Despite through-space and through-bond B−B interactions, the stable 1,3-bora-2,4-diphosphoniocyclobutane-1,3-diyl displays some radical-type behavior, as illustrated by the spontaneous formation of the trans 1,3-adduct with trimethyltin hydride and a B-spiro derivative with bromotrichloromethane.

尽管存在空间穿过与键穿过型硼-硼相互作用，该稳定的1,3-硼杂-2,4-二𬭸环丁烷-1,3-二基仍表现出一定的自由基类行为。该行为可通过其与三甲基氢化锡自发生成反式1,3-加成产物，以及与三氯溴甲烷生成硼位螺环衍生物的反应得到佐证。