Free radicals formed by H(Mu) addition to fluoranthene

Abstract

Muonium has been used as an H atom analogue to investigate the free radicals formed by H addition to the polyaromatic hydrocarbon fluoranthene. There are nine unique carbons in the molecule, but only five radicals were detected. Muon and proton hyperfine constants were determined by transverse field µSR and µLCR, respectively, and compared with calculated values. All signals were assigned to radicals formed by Mu addition to C-H sites. There is no evidence for addition to the tertiary carbons at ring junctions.Key words: muonium, fluoranthene, free radical, hyperfine constants.