Primary,Secondary,and Tertiary Hydrogens H R RCH R一C-H R一C-H H H R primary (1)hydrogens secondary(2)hydrogens tertiary (3)hydrogen Six primary (I)hydrogens relative reactiviry CH3 Cl,lnv 40% H2C CH3一CH2一CH2-CI 6 hydrogens =6.67%perH CH3 replacement primary chloride Two secondary (2)hydrogens CI H CH3 Cl./n 60% CH3一CH一CH3 -=30.0%per日 replacement 2 hydrogens H CH3 secondary chloride The2°hydrogens are 30.0 6.67 =4.5 times as reactive as the 1 hydrogens. Chapter 4 3Primary, Secondary, and Tertiary Hydrogens Chapter 4 3