The oxidation of 4,4′-(trimethylene)bis(2,6-di-t-butylphenol) with lead dioxide underwent intramolecular cyclization at the 4,4′-positions to give a dispiro-compound. Irradiation of the dispiro-compound in a methylcyclohexane matrix at −150 °C produced 4,4′-(trimethylene)bis(2,6-di-t-butylphenoxy) diradical which has a stable triplet state.
4,4′-(三亚甲基)双(
2,6-二叔丁基苯酚)与
二氧化铅的氧化反应在4,4′位发生分子内环化反应,生成二
螺环化合物。在-150°C下,在
甲基环己烷基质中对二
螺环化合物进行辐照,生成4,4′-(三亚甲基)双(2,6-二
叔丁基苯氧基)二自由基,该自由基具有稳定的三重态。