Rule 1:The Main Chain Find the longest chain of consecutive carbons. The longest chain is 2 CH,CH, six carbons: CH3-CH-CH2-CH2-CH, 3 4 6 hexane 3-methylhexane 2013 Pearson Education,Inc. Chapter 3 11 © 2013 Pearson Education, Inc. Rule 1: The Main Chain The longest chain is six carbons: hexane Find the longest chain of consecutive carbons. Chapter 3 11