For example, (CH3)2CHCH3, commonly known as isobutane, is treated as a propane chain with a methyl group bonded to the middle (2) carbon, and given the systematic name 2-methylpropane. However, although the name 2-methylpropane COULD be used, it is easier and more logical to call it ...
4-methylheptane is the name of this compound. Ethyl Groups A two-carbon alkane is called ethane, CH3CH3. The corresponding two-carbon fragment is always CH3CH2-, which is called “ethyl”. 4-ethylheptane is the name for this one. Propyl Groups There are two possible three-carbon alkyl ...