我们来考虑一下如何划分单键、双键和三键。

Let's think about how we can classify single and double and triple bonds,.

youdao

是氢的键更短，还是氮与氮的三键更短？

Is a hydrogen bond shorter, or is a nitrogen-nitrogen triple bond going to be shorter?

youdao

一个三键，同样的也有沿着核间轴sigma键。

A triple bond, again is going to have one sigma bond on the internuclear axis.

youdao

And something that we'll see later on is that triple bonds, for example, are going to be stronger than a corresponding double bond or a corresponding single bond.

而我们以后还会看到三键，举例来说，应该更强，相较于相应的双键,或者相应的单键来说。

麻省理工公开课 - 化学原理课程节选

so you can see that there is going to be two sets in antibonding, three sets in bonding for a net of one, giving us the single bond.

因此你能看到,反键轨道上有两组，三组成键，得到一组净成键，所以成的是单键。

麻省理工公开课 - 固态化学导论课程节选

Let's re-draw this, so it looks a little bit neater, where we have a triple bond in the middle instead, and again, we need our negative 1 charge there.

让我们重写这个，这样看起来更整洁一点，我们有一个三键在中间，同样地，我们这里需要一个负电荷。

麻省理工公开课 - 化学原理课程节选