这里的这个，因为处在一个较高的能级，被叫做反键分子轨道能级。

And this one here, because it is at a higher energy is called antibonding molecular orbital.

youdao

特别的，我们把它们和，分子轨道相联系起来，我们说它们可以成为，成键轨道或者反键轨道。

So specifically, what we do associate them instead is within molecular orbitals, and what we say is that they can be either in bonding or anti-bonding orbitals.

youdao

我将给分子轨道加上标，这个上标，表示反键轨道，有一个星号。

And I am going to superscript it molecular orbital, and this upper one, to indicate that it's antibonding, has the asterisk.

youdao