1)c8h18-->c4h8+c4h10
c4h10-->c2h8+c2h4
c12h26-->c6h14+c6h12
c10h22-->c5h12+c5h10
c9h20-->c3h7+c6h13
2)1)ch3-ch2-ch2-ch3-->ch3-ch-ch3. |
ch3
1)c8h18-->c4h8+c4h10
c4h10-->c2h8+c2h4
c12h26-->c6h14+c6h12
c10h22-->c5h12+c5h10
c9h20-->c3h7+c6h13
2)1)ch3-ch2-ch2-ch3-->ch3-ch-ch3. |
ch3