Retrieving "Terahertz Region" from the archives

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1. Mirror Image Transition States

   Linked via "terahertz region"

   Spectroscopic Signatures and Experimental Detection
   Direct experimental observation of a true MITS remains elusive due to its instantaneous nature ($\sim 10^{-14}$ seconds) and the difficulty in spectroscopically resolving features associated with purely geometric reflection rather than energy minima. However, MITS are hypothesized to leave discernible, albeit subtle, imprints on vibrational spectra, particularly in the low-frequency terahertz region (Mulligan, 1999).
   T…