Let's say, suppose we hypothesize that an octet of the electrons is going to lead to stability.

假设我们猜测,八电子结构能够带来稳定。

麻省理工公开课 - 固态化学导论课程节选

OK, last day, you talked about the Born-Haber cycle, and octet stability via electron transfer.

言归正传，昨天我们讲的是伯恩哈勃循环，和8电子稳定结构。

麻省理工公开课 - 固态化学导论课程节选

They do that because the bases can interact with one another in particular ways, and this you know about.

它们结构稳定,是因为碱基之间,以特定方式相互作用,这是你需要知道的

耶鲁公开课 - 生物医学工程探索课程节选

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

Six-month-olds don't, and even 12-month-olds don't find anything weird about this, while adults are sophisticated enough to understand that that's an unstable configuration and should fall over.

六个月大的婴儿则不会这么想,即使是十二个月大的婴儿,也没有发现这个木块存在的异常,只有经历世事的成年人才会理解,这不是个稳定的结构,而这个结构是会倒塌的

耶鲁公开课 - 心理学导论课程节选

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

Octet stability is the term applied to this feature.

八电子稳定结构反映的就是这个特性。

麻省理工公开课 - 固态化学导论课程节选

Those are going to be the more stable or the lower energy structures.

这种结构应该是更稳定的,或者能量更低的结构。

麻省理工公开课 - 化学原理课程节选

And, I've achieved octet stability in a new way.

这样，我就以一种新方式得到八电子稳定结构。

麻省理工公开课 - 固态化学导论课程节选

Hybridization simply means that DNA will re-nature and form a stable double helix only with its particular match, only with the hybrid that it is perfectly complementary, too.

核酸分子杂交表示,DNA在变性状态下可以恢复活性,和与其配对的单链形成稳定的双螺旋结构,只有在完全配对时才会发生这种情况

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

So, it would achieve octet stability.

所以它就能达到稳定结构。

麻省理工公开课 - 固态化学导论课程节选

And as a result of that, the achieving of octet stability via electron transfer tumbled to the idea of an ionic bond where one atom donates an electron completely to the other atom, sort of like servanthood.

有了他们，也就是形成八隅体的稳定结构,通过电子的扰动形成理想的离子键,这儿一个原子完全将一个电子,给另一个原子，有点像奴仆关系。

麻省理工公开课 - 固态化学导论课程节选

So, remember, boron was one of those exceptions to our Lewis structure rules where it was perfectly happy not having a full octet.

所以我们可以加上3个氢原子,对于BH3，这是个稳定结构,记住，B是Lewis结构的一个特例。

麻省理工公开课 - 化学原理课程节选

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

It has to do with the nature of this complementary binding between double stranded DNA and the fidelity of this base pair matching in forming stable DNA molecules.

这些特性能从根本上解释,为何DNA双链的碱基能互补配对,以及在形成稳定的DNA分子结构时,碱基互补配对为何具有一致性

耶鲁公开课 - 生物医学工程探索课程节选

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

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