Isobutyl Groups H H H C-H C-H H H H H H-C-C-C-H H-C-C-C-H H H H HH isobutyl tert-butyl A primary carbon A tertiary carbon Chapter 3 11 Chapter 3 11 Isobutyl Groups H C H H C C H H C H H H H H C H H C C H H C H H H H H H A primary carbon A tertiary carbon => isobutyl tert-butyl