Question

What are the Isomers of C4 H10

Answer 1

Butane and 2-methylpropane

Answer 2

 any different arrangements which are simply due to the molecule rotating as a whole, or rotating about particular bonds

Butane (C4H10) has two structural isomers.

Isomer 1 is the straight chain normal structure for butane
(called n-butane).



Isomer 2 (called 2-methyl propane) is a different structure
with a branched chain which has a carbon*