All right. So formal charge can actually help us out when we're trying to decide between several Lewis structures that look like they might be comparable in terms of which might be the lower energy or the more stable structure.

好的，形式电荷真的可以,帮助我们决定,在几种路易斯结构中,哪个更可能符合能量更低,或者结构更稳定的要求。

麻省理工公开课 - 化学原理课程节选

So what we'll have here is a trigonal planar case, and you can see that we only have three electrons that are set for bonding, so we'll add three hydrogens, and for b h 3, we'll get a stable structure here.

让电子劲量远离的时候，不用考虑它,这个例子是平面三角形，你可以看到，只有3个电子可以成键。

麻省理工公开课 - 化学原理课程节选

That's because you have to satisfy this base pair matching in order to have hydrogen bonding in each of the struts of the ladder in order to form a stable structure.

NA双链要满足互补配对原则,以使碱基对之间,形成氢键,从而形成稳定的双链结构

耶鲁公开课 - 生物医学工程探索课程节选

which is the more stable structure, because we have two different structures here.

哪一个结构更加稳定，因为我们这里有两个不同的结构。

麻省理工公开课 - 化学原理课程节选

Now DNA is a double helix and I've only shown you one part of the helix, right? I've shown you one upright strut and a base hanging off of it, but it forms a double helix because complementary strands of DNA strongly associate with one another and that's a very stable structure.

NA是双螺旋,我只是给你们讲了螺旋的一边,我给你们演示,一条链的支柱及碱基团,但其能构成双螺旋,是因为DNA是完全互补的两条链,彼此之间结合紧密,结构异常稳定

耶鲁公开课 - 生物医学工程探索课程节选

But I want you to tell me in terms of thinking about formal charge, which Lewis structure would you predict to be the most stable?

但我想让大家告诉我,从形式电荷的角度考虑，你会预测哪一个路易斯结构是最稳定的？

麻省理工公开课 - 化学原理课程节选

So they like to be in the membrane and they're stable there and they won't come out because their structure allows them to exist in these unique spaces.

所以它们在膜里稳定存在,而且也不会脱离膜,因为这些蛋白质的结构使其能存在于,磷脂双分子层这个独特的环境中

耶鲁公开课 - 生物医学工程探索课程节选

So what we see is that structure a is the most stable because we have the least separation of charge in the case of structure a.

因此我们看到结构，A，应该是最稳定的,因为这种情况下,分开的电荷最少。

麻省理工公开课 - 化学原理课程节选