If we wanted to give a technical name for it, isobutane would be 2-methylpropane.

果我们想给它一个技术名称， 异就是 2-甲基丙。

This is called isobutane or i-butane.

这称为异或异。

For example, n-butane boils at -0.5 degrees Celsius while isobutane boils at -11.7 degrees Celsius.

例，正为 -0. 5 摄氏度， 而异为 -11. 7 摄氏度。

Earlier, I introduced you to isobutane, a compound with four carbons that are not all in a chain.

早些时候，我向您介绍了异， 这是一种具有四个碳原子化合物， 这些碳原子并不全部位于链中。

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

所以原子数是只允许2种异构体， 正和异。

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， 它是异构体，但根据所有重要命名规则， 它实际上根本不是。