Natural bond orbital analysis was performed to reveal the origin of the interaction.

由自然键轨道分析揭示了相互作用的本质。

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Natural bond orbital (NBO) analysis is performed to reveal the origin of the interaction.

由自然键轨道(NBO)分析揭示了相互作用的本质。

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Theories of nature bond orbital(NBO)and atoms in molecules (AIM) were used to discuss bond nature and relative stabilities of such conformers.

利用自然键轨道理论（NBO）和分子中的原子理论（AIM）分析了这些异构体的成键特征、相对稳定性。

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So even though we see a nodal plane down the center, I just want to really point out that it's only when we have a nodal plane in the internuclear or the bond axis that we're calling that a pi orbital.

虽然在中间有个节面，我想要指出的是,只有节面在核间轴,或者键轴上时,我们才叫它π轨道。

麻省理工公开课 - 化学原理课程节选

Pi orbitals are a molecular orbital that have a nodal plane through the bond axis.

轨道是沿着键轴,有节面的分子轨道。

麻省理工公开课 - 化学原理课程节选

All right, so if we think about b h bond here, again, it's the sigma bond, and we're going to say it's a boron 2 s p 2 hybrid orbital interacting with a hydrogen 1 s orbital.

这可以告诉我们，为什么它倾向于周围只有6个电子，好了，考虑一下这里的BH键,同样的，它是sigma键,我们说。

麻省理工公开课 - 化学原理课程节选