And again, I want you to have practiced drawing these out in the form you always need to start with the sigma and then write the number of the orbital. 同样的,我希望你们,练习画这种图,你总是要从sigma开始,然后写出轨道数目。
This is sigma star with the antibonding orbital that came from1s, and it is a molecular orbital. 这是sigma星,来自于1s的反键轨道,它是一个分子轨道。
Do you predict that this will be a sigma or a pi orbital? 你们认为这是sigma轨道还是π轨道?
Another thing I want to point out about every sigma orbital that you see, and it will make more sense when we contrast it with pi orbitals later. 另外一个我要指出的事情就是,关于每个sigma轨道你能看到,当我们把它和π轨道对比的时候会看的更清楚。
Also, it is cylindrically symmetric around the bonding axis, so this is how we know that it's a sigma orbital. 此外,它关于键轴是圆柱对称的,这就是为什么我们知道它是sigma轨道。
Sigma symmetry of this molecular orbital, specifically that it's cylindrically symmetric about the bond axis. 告诉我们关于,And,the,sigma,tells,us,something,about,the,分子轨道对称性的信息,特别是它关于键轴是圆柱对称的。