The oxidation of a series
of 4,4'-alkylidenebis(2,6-di-t-butylphenols) having increasing substitution of
the central methylene carbon by alkyl groups is examined. In the
monosubstituted compounds the stability of the monophenoxy radical increases
with increase in the size of the substituent, while the stability of the galvinoxyl type radical decreases. β-Coupled products
are only obtained from the ethylidene bisphenol, a result that can be
correlated with e.s.r. hyperfine splitting constants. With increasing mono- or di-substitution bisspiroperoxides become the preferred
oxidation products. The e.s.r. spectrum of an ethylenebisgalvinoxyl
biradical is described.
一系列 4,4'-亚烷基双(2,6-二叔丁基苯酚
研究了一系列 4,4'-亚烷基双(2,6-二叔丁基苯酚)的氧化反应。
考察了一系列 4,4'-亚烷基双(2,6-二对丁基苯酚)的氧化过程。在
在单取代的化合物中,单苯氧基自由基的稳定性随着取代基大小的增加而增加。
随着取代基大小的增加,单苯氧基自由基的稳定性增加,而半乙酰氧基自由基的稳定性降低。β-偶联产物
只从亚乙基双酚中获得,这一结果与 e.s.r.
超频分裂常数相关联。随着单取代基或双取代基的增加,双螺过氧化物成为首选的
氧化产物。描述了乙烯-双丙烯酰氧基双环氧乙烷的 e.s.r. 光谱。
双环氧乙烷的 e.s.r. 光谱。