EPR-studies on the chelation of alkali metal cations by radical-anions—IV Radical-anions derived from 1,2,4,5-tetramesitoybenzene

✍ Scribed by B.J. Herold; M. Celina; R.L.R. Lazana; H.M. Novais

• Publisher: Elsevier Science
• Year: 1977
• Tongue: French
• Weight: 399 KB
• Volume: 33
• Category: Article
• ISSN: 0040-4020
• DOI: 10.1016/s0040-4020(77)80009-4

✦ Synopsis

Abstraet--l,2,4,5-Tetramesitoylbenzene was synthesized and reduced with alkali metals as well as electrolytically. EPR spectra of the resulting radical-ion pairs are reported and discussed. The electron-spin densities obtained from splitting constants are compared to the results of MO calculations. The large alkali-metal couplings show a negative temperature coet~cient and marked solvent dependency. These effects are compared with the ones observed in the corresponding radical-ion pairs of o-dimesitoylbenzene for which some new data are also reported.