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Studies on mesoionic compounds, II. The solvent effect on the electronic absorption spectra of mesoionic 2,3‐diaryl‐2 H ‐tetrazolium‐5‐thiolate derivatives
Author(s) -
Kiwan A. M.,
Kassim A. Y.
Publication year - 1978
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570150129
Subject(s) - mesoionic , chemistry , absorption (acoustics) , absorption spectroscopy , solvent , spectral line , molecular electronic transition , medicinal chemistry , stereochemistry , photochemistry , analytical chemistry (journal) , organic chemistry , molecule , physics , quantum mechanics , astronomy , acoustics
Abstract The electronic absorption spectra of 2,3‐di(2‐fluorophenyl)‐, 2,3‐di(4‐fluorophenyl)‐, 2,3‐di‐(2‐chlorophenyl)‐, 2,3‐di(2‐methylphenyl)‐, 2,3‐di(4‐methylphenyl)‐ and 2,3‐di(2‐methoxyphenyl)‐2 H ‐tetrazolium‐5‐thiolates have been measured in pure and mixed solvents. They were found to exhibit three characteristic absorption bands at 480‐380 nm, near 250 and near 210; the longest wavenlength band of which was assigned to an n → π* transition.