Electron spin resonance studies on internal motion and conformation of polyphenoxy radicals
作者： W.J van den Hoek , J.F.Th de Winter , J Smidt
DOI: 10.1016/0022-2364(72)90084-4
关键词: Polymer 、 Motion (geometry) 、 Ring (chemistry) 、 Hyperfine coupling 、 Radical 、 Spin (physics) 、 Electron paramagnetic resonance 、 Chemistry 、 Atomic physics
摘要: Abstract A comparative study is made of a series polymeric 4-aryloxyphenoxy radicals (polyphenoxy radicals) and 4-methoxyphenoxy radicals. Most polyphenoxy show hyperfine coupling the protons first ring polymer chain only; moreover, ortho couplings are inequivalent at 20°C. At higher temperatures symmetric line-width effects often observed, indicating fast internal motion. The nature motions discussed. Hyperfine with second-ring observed in poly-2,3,5,6-tetramethylphenoxy radical. Approximate conclusions about equilibrium conformations spin distribution drawn.
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sci-hub.se 参考文章(22)
W.J. Mijs, J.H. van Dijk, W.G.B. Huysmans, J.G. Westra, Catalytic oxidation of phenols Tetrahedron. ,vol. 25, pp. 4233- 4240 ,(1969) , 10.1016/S0040-4020(01)82961-6
Cornelius. Steelink, J. D. Fitzpatrick, Lowell D. Kispert, James S. Hyde, Electron paramagnetic resonance and electron-nuclear double resonance studies of phenoxyl radicals derived from substituted diphenylmethanes Journal of the American Chemical Society. ,vol. 90, pp. 4354- 4361 ,(1968) , 10.1021/JA01018A027
W.J van den Hoek, W.G.B Huysmans, M.J.C van Gemer, Line-width alternation by methoxy group rotation in the electron spin resonance spectra of a phenoxy radical Journal of Magnetic Resonance (1969). ,vol. 3, pp. 137- 145 ,(1970) , 10.1016/0022-2364(70)90041-7
Gary Paul Rabold, Ronald T. Ogata, M. Okamura, L. H. Piette, R. E. Moore, P. J. Scheuer, ESR Studies of Naphthoquinones and Related Compounds. Hyperfine Interaction by the Methoxyl Group as a Conformational Probe The Journal of Chemical Physics. ,vol. 46, pp. 1161- 1167 ,(1967) , 10.1063/1.1840784
W.G.B. Huysmans, W.J. Mijs, J.G. Westra, W.J.pp]van den Hoek, H.Angad Gaur, J. Smidt, NMR studies of the quinone ketal dimer, obtained from oxidation of 4-ethoxydurenol Tetrahedron. ,vol. 25, pp. 2249- 2257 ,(1969) , 10.1016/S0040-4020(01)82773-3
Leffert Jonkman, Jan Kommandeur, Solvent induced conformational kinetics (sick) Chemical Physics Letters. ,vol. 5, pp. 579- 583 ,(1970) , 10.1016/0009-2614(70)85052-7
Leonard Gilbert, Robert Kreilick, Electron Spin Resonance Studies of Carbon‐13 Splittings in a Series of Phenoxy Radicals Journal of Chemical Physics. ,vol. 48, pp. 3377- 3380 ,(1968) , 10.1063/1.1669628
W.J. Mijs, O.E. van Lohuizen, J. Bussink, L. Vollbracht, The catalytic oxidation of 4-aryloxyphenols Tetrahedron. ,vol. 23, pp. 2253- 2264 ,(1967) , 10.1016/0040-4020(67)80061-9
Richard W. Fessenden, Robert H. Schuler, ELECTRON SPIN RESONANCE STUDIES OF TRANSIENT ALKYL RADICALS Journal of Chemical Physics. ,vol. 39, pp. 2147- 2195 ,(1963) , 10.1063/1.1701415
R. C. Weast, HANDBOOK OF CHEMISTRY AND PHYSICS, 49th ed The American Journal of the Medical Sciences. ,vol. 257, pp. 423- ,(1969) , 10.1097/00000441-196906000-00020