Studies of the Equilibria between Tetraarylallyl-type Radicals and Their Dimers

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概要

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• Tetraarylallyl-type radicals are stable radicals. In these series, TPA is obtained as radical crystals. However, BDA, BDAA and DDA are obtained as diamagnetic dimerized substances. These are partially dissociated in solution. These can be detected in solution by ESR and optical spectra measurements of these radicals about the equilibrium between the radical monomer and its dimer. The equilibrium constants and the energy of the formation of the dimer are thus determined. The order of the magnitudes of the dimer's formation energies can be explained in terms of the frontier electron densities of the bond-forming positions of radicals.

• 公益社団法人 日本化学会の論文

著者

• Deguchi Yasuo

  College Of Liberal Arts And Science Kyoto University

• Watanabe Kohji

  Laboratory of Solid State Chemistry, Institute for Chemical Research, Kyoto University

• Ohya-Nishiguchi Hiroaki

  Faculty of Science, Kyoto University

• Yamaughi Jun

  Laboratory of Solid State Chemistry, Institute for Chemical Research, Kyoto University

関連論文

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• ENDOR and TRIPLE Studies of Diphenyl Nitroxide(DPNO).
• ENDOR study of benzothiazolone azine cation radicals by means of a TM110 mode cavity.
• The ESR Spectra of Michler's Ketone Anion Radicals
• The Magnetic Properties of Manganese(II) Phthalocyanine
• The Intramolecular Dynamic Behavior of Tetraaryl Allyl Radicals
• The Magnetic Properties of Cu3Cl6(C6H7NO)2·2H2O
• The Proton Magnetic Resonance in the DPPH–Benzene Complex
• The Chlorine Nuclear Quadrupole Resonance in an Organic Free Radical, p-Cl-EDPA
• Studies of the Equilibria between Tetraarylallyl-type Radicals and Their Dimers
• Abnormal Hyperfine Splitting in the ESR Spectra of α,α,γ,γ-Tetraphenylallyl-type Organic Stable Free Radicals
• Magnetic study of N,N,N',N'-tetramethyl-p-phenylenediamine (wurster's blue) tetrafluoroborate cation radical.
• Magnetic Properties of Some Iminoxyl Polyradicals. II. TEMPOP Triradical and TEMPOS Tetraradical
• ESR studies of temperature dependent zero-field splitting in yang's biradical.

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