成键轨道(英语:Bonding orbital;Bonding molecular orbital),在分子轨道理论中被用来描述分子中两个或多个原子原子轨道间的相互吸引作用理论化学中,轨道中的电子被描述成以的形式运动[1],当多个同相叠加时,原子轨道会线性地成键组合(constructive combination)成能量较低、电子密度集中在键合区域的分子轨道。分子轨道理论中,与成键轨道对应的概念为反键轨道非键轨道[2]


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