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

结状排列成为“顺式异”线状排列，成为“反式异”。

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

此，与炔烃没有异。呸。好，我暂时完成描述。

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

但是戊 C5H12 有 3 种可能异， 而称为己 C6H14 有 5 种。

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

你必须打破 pi 键，此，整个分子才能在异间旋转。

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

具有相同分子式化合物这些不同结称为异。

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

但是查看这张可能异数量表， 您会发现它迅速增加。

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异。

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

所以原子数是丁只允许2种异， 正丁和异丁。

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

它们不是像正丁和正丁那样结异，相反，它们就是我们所说顺反异。

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， 为饱和脂肪没有双键，此不会有顺式和反式异。

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.

他们称其为异丁， 它是丁异，但根据所有重要命名规则， 它实际上根本不是丁。

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.

进化以酶形式提供了大量这类物质，这些酶是大型、复杂、有时还会变化无常蛋白质分子，但它们优点是可以产生被称为光学异纯净版本。