Vibrational energy distributions and intrinsic frequencies are computed at selected points along the H 2 + CH 3 - H + CH4 intrinsic reaction coordinate, calculated at the UHF /ST0-3G level. The energy distributions and intrinsic frequencies are shown to provide a clear and intuitively pleasing picture of the evolution of generalized normal coordinates along the reaction path. Furthermore, these quantities aid in the identification of avoided crossings between distinct generalized normal modes and between generalized normal modes and the reaction coordinate.