弯曲键,也称香蕉键,是有机化学中的一类共价键,其3D模拟形状就像一个香蕉。这个概念描述的是一个小环分子内“弯曲的”电子密度或电子排布,例如环丙烷白磷中的共价键和乙硼烷中的三中心两电子键

Coulson-Moffitt模型(1947):第一个将弯曲键用于环丙烷的模型

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