Common AlkyI Groups One carbon Two carbons Three carbons CH3 CH3一 CH3-CH2- CH3-CH2-CH2- CH3-CH- methyl group ethyl group propyl group isopropyl group (or“-propyl group") Four carbons CH3 CH3 CH3 CH3-CH2-CH2-CH2- CH3-CH-CH2一 CH3-CH2-CH- CH3-C- butyl group isobutyl group sec-butyl group (or“n-butyl group") CH3 tert-butyl group (or“t-butyl group") Copyright 2010 Pearson Prentice Hall,Inc. Common Alkyl Groups