Complex Substituents Complex alkyl groups are named by using the longest carbon chain. Carbon number 1 of the alkyl group is the carbon attached to the main chain. CH2CH3 CH3 CH3 CH2CH-CH3 C-CH2CH-CH3 CH3 CH3 a(1-ethyl-2-methylpropyl)group a(1,1,3-trimethylbutyl)group When naming involves complex substituents,the first letter in the complex substituent,regardless of type,is used for alphabetizing 2013 Pearson Education,Inc. Chapter 3 21 © 2013 Pearson Education, Inc. Complex Substituents • Complex alkyl groups are named by using the longest carbon chain. • Carbon number 1 of the alkyl group is the carbon attached to the main chain. CH CH CH2 CH3 CH3 CH3 1 2 3 C CH3 CH3 CH2 CH CH3 CH3 1 2 3 4 a (1-ethyl-2-methylpropyl) group a (1,1,3-trimethylbutyl) group Chapter 3 21 When naming involves complex substituents, the first letter in the complex substituent, regardless of type, is used for alphabetizing