Pentanes H HHHHH H-C-H H-C-C-C-C-C-H H H H HHHHH H-C-C- -C-C-H HH n-pentane,CsH12 isopentane,CsH12 CH3 H3C-C-CH3 CH3 二> neopentane,C 5H12 Chapter 3 4Chapter 3 4 Pentanes H C H C H H C H H C H C H H H H H n-pentane, C5 H12 H C H C C H H C H H H H H C H H H isopentane, C 5 H12 => C CH3 H3C CH3 CH3 neopentane, C 5H12