Figure 2.
Intramolecular exchange and thermodynamics of N, N-diethyl-m-toluamide (m-DEET). (a) Spectral changes corresponding to an intramolecular exchange between two sites as a function of sample temperature, (b) exchange-correlation spectroscopy (EXSY) spectra of m-DEET at three different temperatures. In (a) and (b), the two sites ore marked as ‘A’ and ‘B.’ (c) Eyring plot used to determine the activation enthalpy and entropy, and the kex was estimated using the line shape analysis from the panel (a). The insert in panel (c) shows the molecular structure of m-DEET. Figure reproduced with permission [31].