Protonation of the free 2,4,6-triphenylpyranyl radical

Journal Article · Mon Mar 10 04:00:00 EST 1986 · J. Gen. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:5676653

Klimov, E S; Okhlobystin, O Yu

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/sup -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.

• Research Organization: K. L. Khetagurov North Ossetia State Univ., Ordzhonikidze, USSR
• OSTI ID: 5676653
• Journal Information: J. Gen. Chem. USSR (Engl. Transl.); (United States), Journal Name: J. Gen. Chem. USSR (Engl. Transl.); (United States) Vol. 55:9; ISSN JGCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
CATIONS
CHARGED PARTICLES
CHEMICAL REACTIONS
ELECTRON SPIN RESONANCE
ELECTRON TRANSFER
HETEROCYCLIC COMPOUNDS
HYDROGEN TRANSFER
HYDROGENATION
HYPERFINE STRUCTURE
IONS
LINE WIDTHS
MAGNETIC RESONANCE
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDATION
PYRANS
RADICALS
REACTION INTERMEDIATES
REDUCTION
RESONANCE