So carbon has four valence electrons, so if we talk about c 2, again we're going to start filling in our molecular orbitals, and now we're going to have eight electrons to fill into our molecular orbitals.

碳有4个价电子，所以如果我们考虑C2的话，同样，我们开始填分子轨道，现在我们有8个电子,要填入分子轨道。

麻省理工公开课 - 化学原理课程节选

So let's talk about what the bonding order is going to be for c 2.

让我们讨论一下C2的键序是多少。

麻省理工公开课 - 化学原理课程节选

So let's think about what this valence electron configuration is for c 2.

让我们来看一下C2的,价电子构型是怎么样的。

麻省理工公开课 - 化学原理课程节选

OK PROFESSOR: two? OK, 2 so we have 2, 4, 6 minus 2, 2 so we have 1/2 of 6 minus 2, so that's 1/2 half 4, so we have a bonding order of two for carbon 2.

教授：两个？,我们有2，4，6减去，所以我们有1/2的6减去，所以是4的一半，所以C2的键序为2。

麻省理工公开课 - 化学原理课程节选