从杂化轨道理论出发,探讨了三卤化硼分子(BX3,X=F,Cl,Br,I)中的σ共价键和离域大π键的形成,并用离域大π键解释了缺电子化合物三卤化硼的稳定性。用卤素的电负性及其三卤化硼的离域大π键这两个因素讨论了三卤化硼的Lewis酸性强弱顺序、水解及形成配合物的难易程度。
According to the hybrid orbital theory,the formation of σ covalent bond and delocalization large π bond in boron trihalides molecule(BX3,X=F,Cl,Br,I) was discussed,and the stability of boron trihalides that were deficient electron with delocalized large π bond was explained.In accordance with halogen electronegativity and boron trihalides large π bond of boron trihalides,strength of Lewis acidity,trend of hydrolysis and level of forming complex for boron trihalides were discussed.