He said that the percent ionic character, and this is within a bond, not for a compound, for a covalent bond.

他提到离子百分数，是指一根键中，并非一个分子中。

麻省理工公开课 - 固态化学导论课程节选

So let's figure out the bond order for our two molecules here that we figured out the electron configuration for.

让我们看看这里,两个分子的键序是多少。

麻省理工公开课 - 化学原理课程节选

And you would find that the bond energy of the heteronuclear molecule was nowhere on the average of the two.

你将发现,电子相同的分子的总能量,并不是平分的。

麻省理工公开课 - 固态化学导论课程节选

So there's not a lot of room in the government bond market or other high-quality bond markets to generate excess returns.

所以对于政府债券或者优质债券,超额收益的空间不大

耶鲁公开课 - 金融市场课程节选

So, there's actually another way to graph it where we can directly graph the dissociation energy or the bond strengths.

其实，还有另外一种画这个曲线的方式,可以直接画出离解能的大小,或者键的强度。

麻省理工公开课 - 化学原理课程节选

So what we can actually directly compare is the dissociation energy or the bond strength of nitrogen versus hydrogen.

因此实际上我们可以直接进行比较,对氮分子与氢分子的离解能,或键的强度。

麻省理工公开课 - 化学原理课程节选

The price of the two-period bond is 1/2 and the price of the one-period bond is 1/.

所以两年期债券的价格是1/^2,一年期债券的价格则是1/

耶鲁公开课 - 金融市场课程节选

We see that the radius is shorter, so that means that the nitrogen-nitrogen bond is going to be shorter.

我们看到这个距离更短，这就意味着,氮与氮之间的键应该更短。

麻省理工公开课 - 化学原理课程节选

So if we look at its length, it's actually shorter than a single bond, but longer than a double bond.

因此如果我们看它的键长的话，它实际上比单键更短，却比双键更长。

麻省理工公开课 - 化学原理课程节选

And we find the same thing for these two atoms here, it's not actually a double bond, it's somewhere between a single bond and a double bond.

而且我们发现这两个原子的情况是一样的，它其实不是一个双键，而是介于单键与双键之间的。

麻省理工公开课 - 化学原理课程节选

We can know this information even if we just knew that the bond was stronger, we wouldn't need to look at a graph here, because it turns out that if you have a stronger bond, -- that also means that you have a shorter bond -- those two are correlated.

我们依然可以得到上面的信息,即使我们所知道仅仅是这个键更强，我们不需要去看这个图，因为事实上如果你有一个更强的键，这也就意味着你有一个更短的键-,这两点是互相关联的。

麻省理工公开课 - 化学原理课程节选

So what we see is a bond order of 0, and again, the bond is very, very weak.

我们看到键序是0，同样的，键非常非常的弱。

麻省理工公开课 - 化学原理课程节选

So let's take a look at what actually happens if we're talking about a carbon-carbon double bond, we're going to have a double bond.

让我们来看一看碳碳双键的情况,例如在乙烷里，我们有个双键。

麻省理工公开课 - 化学原理课程节选

So we want to have constructive interference to form a bond, where as if we had destructive interference, we would not be forming a bond.

我们需要,相干相长来成键，如果，相干相消了，就不能成键，所以这时候。

麻省理工公开课 - 化学原理课程节选

Molecular orbital theory, even at this very basic level, allowed us to predict that no, we're not going to see a true bond here, a strong bond.

即使在最基础的层次，分子轨道理论预计，我们不会看到一个键，一个强的键，。

麻省理工公开课 - 化学原理课程节选

So it's very important to be keeping in mind that any time you see a double bond, you have a pi bond there, so you're not going to see any rotation around the bond axis.

所以你们要记住,任何时候你们看到一个双键，这里面有π键，你们不会看到关于键轴的任何转动。

麻省理工公开课 - 化学原理课程节选