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Internal Rotation of the Methyl Group in Cations of Toluene Derivatives
Author(s) -
Fujii Masaaki,
Takazawa Ken,
Ito Mitsuo
Publication year - 1995
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.199500045
Subject(s) - chemistry , toluene , internal rotation , ionization , methyl group , rotation (mathematics) , distortion (music) , derivative (finance) , group (periodic table) , spectroscopy , rectangular potential barrier , analytical chemistry (journal) , computational chemistry , ion , organic chemistry , geometry , condensed matter physics , quantum mechanics , mechanical engineering , amplifier , physics , mathematics , cmos , electronic engineering , financial economics , engineering , economics
Abstract The potential of the internal rotation of the methyl group was determined for o‐, m‐, and p‐fluorotoluene cations by pulsed field ionization spectroscopy. The potential of the internal rotational motion was also surveyed for other toluene derivative cations. It was found that the barrier height generally increases by ionization. The increase in the barrier height has been discussed in connection with the reduction of the internal rotational constant B by ionization. The geometrical distortion of the methyl group during the internal rotation has been suggested.