Question

How would you write condensed formula for neo-pentane

Answer 1

Neopentane is an isomer of pentane, so it only differ in the structure of carbon skeletal chain. Its structure has four methyl groups attached to the central carbon. So its IUPAC name is 2,2-dimethylpropane



ans::
2,2-Dimethylbutane has a four-carbon chain with two methyl groups on C-2.

The condensed structural formula is CH₃C(CH₃)₂CH₂CH₃.

Note that the two CH₃ groups are enclosed in parentheses after the carbon atom to which they are attached.