Isotope effects in the diphenylpicrylhydrazyl-inhibited thermal polymerization of 2,6-dideuteriostyrene
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There is an inverse isotope effect in the reaction between 2,2-diphenyl-1-picrylhydrazyl DPPH and 2,6-dideuteriostyrene of 0.75 ± 0.07 at 75 °C in degassed neat styrene. This result is consistent with the proposal that the reaction involves hydrogen transfer to DPPH from a Diels–Alder dimer of styrene. The rate constant for dimerization of styrene to this dimer is calculated to be 1.8 × 10−10 L mol−1 s−1 at 75 °C.
1969 ◽
Vol 47
(21)
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pp. 4049-4058
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1999 ◽
Vol 121
(13)
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pp. 3150-3155
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1984 ◽
Vol 141
(1)
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pp. 157-163
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