The reactions of CH2C(CH3)2NH3with Cu+(aq) and Cr(H2O)62+were studied using the pulse radiolysis technique. The formation of the unstable [CuII-CH2C(CH3)2(NH3+)]+and [(H2O)sCrIII-CH2C(CH3)2(NH3+)]2+ions was observed in these reactions. These complexes decompose via /S elimination of NH3to yield 2-methylpropene, ammonia, and Cu2+(aq) or Cr3+(aq). The rates of these β-elimination reactions are considerably slower than those of the analogous β-hydroxyl elimination. It is suggested that the rates of the β-elimination processes are correlated to the strengths of the C-O and C-N bonds, which are cleaved in these reactions. A valence-bond analysis coupled with some ab-initio SCF-MO computations explains the effect of protonation on these bond strengths.