A high magnetic field study of the triplet state of hexachlorobenzene☆
Review articleOpen access
Abstract:

AbstractAn analysis of the high field Zeeman effects of (0, 0), 0 + 195 cm−1, 0 +_254 cm−1, 0 + 359 cm−1 and 0 + 1199 cm−1 vibronic transitions in the lowest triplet state of hexachlorobenzene are presented. The studies refer to crysthesis at 4.2°K in fields of ca. 80 kG. The results show that 195 cm−1 is an upper state eg mode, 254 cm−1 is probably eg but perhaps a2g, and 359 cm−1 and 1189 cm−1 are ag vibrations. The molecular symmetry is shown to be different from D3d as far as spin-orbit selection rules are concerned (as expected from the known crystal structure) but as expected no evidence of the crystal field mixing of D3d state) appears in the non-totally symmetric vibronic bands. The distribution of electric-dipole strength over the various spin sub-states is deduced for each type of vibronic level.

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