Abstract

often formulated in the context of classical me-chanics. To elucidate further the mechanisms of proton motion, future investigations of this sys-tem will be undertaken on deuterated analogs. That the moiety that displays coherent pro-ton tunneling is not the ground state of the system is of interest and worthy of further ex-amination. The energy characterizing the growth of the tunneling peak, D 5 (125 6 10)kB K, is relatively small and of similar mag-nitude to the energy differences between tau-tomers related, for example, by proton transfer in carboxylic acid dimers and in the closely related molecule tBC (10). Examination of the spectral density recorded on calix[4]arene as i