The isomer of C7H16 that contains 3 methyl branches on the parent chain is known as 2,2,3-trimethylbutane. Here is the structure:
CH3
|
CH3-C-CH3
|
CH3
In this structure, the parent chain is butane (4 carbon atoms). The three methyl groups (CH3) are attached to the second and third carbon atoms of the parent chain. The second carbon atom has two methyl groups attached to it, and the third carbon atom has one methyl group attached to it.
This isomer is one of the nine possible isomers of C7H16, each with a unique arrangement of carbon and hydrogen atoms. The presence of three methyl branches makes this isomer distinct from the others.