But pentane, C5H12, has 3 possible isomers and C6H14, known as hexane, has 5.

但是戊烷 C5H12 有 3 种可能的， 而称己烷的 C6H14 有 5 种。

Thus, no isomers with alkynes. Phew. OK I'm done describing for the moment.

因此，与炔烃没有。呸。好的，我暂时完成描述。

But if the parts are different, it's possible to have two totally different isomers of the same compound.

但是，如果部分不同，则同一化合物可能有两种完全不同的。

You would have to break the pi bond, and thus, the entire molecule to rotate between isomers.

你必须破 pi 键，因此，整个分子才能在之间旋转。

These different structures for compounds that have the same molecular formula are called isomers.

具有相同分子的化合物的这些不同结称。

The kinked configuration is called the" cis isomer" and the straight one is the trans isomer.

结状排列成“顺”线状排列，成“”。

So the number of atoms is butane only allows for 2 isomers, n-butane and isobutane.

所以原子数是丁烷只允许2种， 正丁烷和丁烷。

But looking at this table of the number of possible isomers you could see that that escalated quickly.

但是查看这张可能的数量表， 您会发现它迅速增加。

Well we know that they're unsaturated alkenes because saturated fats don't have double bonds, and thus, can't have cis- and trans- isomers.

我们知道它们是不饱和烯烃， 因饱和脂肪没有双键，因此不会有顺和。

They're not structural isomers like n-butane and i-butane, instead, they're what we call cis-trans isomers.

它们不是像正丁烷和正丁烷那样的结，相，它们就是我们所说的顺。

They call that isobutane and it is an isomer of butane, but according to these all important rules of nomenclature, it's not actually any sort of butane at all.

他们称其丁烷， 它是丁烷的，但根据所有重要的命名规则， 它实际上根本不是丁烷。

Evolution has provided a goodly range of these in the form of enzymes, which are large, complicated and sometimes temperamental protein molecules, but which have the advantage that they can create pure versions of what are known as optical isomers.

进化以酶的形提供了大量的这类物质，这些酶是大型的、复杂的、有时还会变化无常的蛋白质分子，但它们的优点是可以产生被称光学的纯净版本。