So we're going to finish talking about molecular orbital theory, we'll switch over to discussing bonding in larger molecules, even larger than diatomic, so we'll move on to talking about valence bond theory and hybridization.

我们要结束关于分子轨道理论的讨论，转向讨论大分子的成键，比二原子分子更大的分子，我们会继续讨论价电子成键理论,和杂化。

麻省理工公开课 - 化学原理课程节选

This bond is polar, but again, as I alluded to earlier, because the carbon is centered in the tetrahedron, because of the sp3 hybridization, the molecule itself is symmetric and nonpolar.

这个键是非极性的，但是，我们断言过早，因为C是中心原子，由于sp3杂化，这个分子本身是非极性的且对称的。

麻省理工公开课 - 固态化学导论课程节选

All right, so one thing that I first want to point outabout MO theory that is a big difference from Lewis structures, is that in MO theory valence electrons are de-localized over the entire molecule.

好了，对于MO理论低一点要指出的,是它和Lewis有着很大的区别，在MO理论里,价电子在整个分子里是去局域化的。

麻省理工公开课 - 化学原理课程节选

So essentially, we have two ethene or ethylene molecules here to start with where these blue are our 2 s p 2 hybrid orbitals, so you can see that for each carbon atom, one is already used up binding to another carbon atom.

本质上，我们从两个乙烯分子开始,蓝色的是2sp2杂化轨道，你可以看到，对于每一个碳原子，其中一个已经用来和另外一个碳原子成键。

麻省理工公开课 - 化学原理课程节选