Traditional Culture Encyclopedia - Traditional festivals - Why is the carbon in the main chain, such as CH3CH(CH3)CH2CH3, pentane? Isn't there four C's on the main chain?
Why is the carbon in the main chain, such as CH3CH(CH3)CH2CH3, pentane? Isn't there four C's on the main chain?
There are two naming methods:
1. The customary naming method is that if there are several C's, it is called an alkane; if there are no branches, it is called an n-alkane. If there is a chain, it is called an isoparaffin with two branches, and it is called a new alkane. This can only be done here, but it can't be named when there are three branches. For example, ch3ch (CH3) ch2ch3 * * has five c's and one branch, which is called isopentane.
2. Systematic nomenclature. Number and name. It's called 2- methylbutane.
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