Fig. 6
From: Muon spectroscopy of a 12-phosphatetraphene with extremely efficient radical trapping properties
Distinguished coordinate reaction paths (ΔH, kcal/mol) for Mu addition to the sp2-phosphorus atom in 1 yielding 1Mu and Mu addition to the 6- and 7-positions in 1 yielding C6-Mu and C7-Mu. The inset shows an enlarged plot indicating the quite small barrier leading to C7-Mu. The structures of the resulting radicals are shown below.
