[en] When dimethylformamide solutions of 2,4,6-triphenylpyranyl radical (obtained from the dimer, which dissociates reversibly in DMFA) and trifluoroacetic acid are mixed under vacuum (10^-3 mm Hg), the mixture acquires a green color. The ESR spectra (recorded on a modified RE-1301 radiospectrometer) contain the radical-cation of 2,4,6-triphenyl-4H-pyran. A characteristic feature of the spectrum is the clearly defined doublet character resulting from the significant splitting at the 4H proton. Each component of the doublet consists of seven groups of hfs lines with intensity ratios of 1:4:7:8:7:4:1 (delocalization of the unpaired electron in the phenyl substituent at the p position). In addition, coupling of the unpaired electron with the 3,5 protons of the pyranyl fragment is observed