Hexane `(C_(6)H_(14))` has 6 carbon atoms in its mlecule. Since we are not supposed to write the sturctural formula of n-hexane (normal hexane), so we cannot put all the 6 carbon atoms in one straight chain Now , first we write 5 crbon atoms in one straight chin and the remaining 1 carbon atom in side chain to obtain one isomer of hexane (called 2-methypentane)[see Figure 25(a)]. Then we write 4 carbon atoms in one atraight chain and the remaining 2 carbon atoms in two side chain and the remaining 2 carbon atoms in two side chains to get the second isomer (called 2,3 dimethylbutane)[see Figure 25(b)]
Before we go further and describe the classification of organic compounds intio homologous series,
