Intermediate products of the photoreduction of diphenoquinones
作者:O. B. Lantratova、V. A. Kuz'min、A. I. Prokof'ev、I. V. Khudyakov、I. E. Pokrovskaya
DOI:10.1007/bf00952195
日期:1981.8
Structure and Proton Reactivity of the Semiquinone Anion and Dianion of Biphenol in Water
作者:G. N. R. Tripathi、Daniel M. Chipman
DOI:10.1021/jp021599n
日期:2002.9.1
water, C12H8O2-•, has a planar or staggered molecular geometry twisted about the inter-ring bond has been examined using time-resolved resonanceRaman spectroscopy and electronic structure computation. Hydrogen-bonding effects on the p,p‘-biphenylsemiquinone radical anion (C12H8O2-•) structure were incorporated in the calculations by associating two water molecules with each oxygen site. The predicted
4,4'-联苯酚在水中的氧化还原中间态,C12H8O2-•,是否具有围绕环间键扭曲的平面或交错分子几何形状,已经使用时间分辨共振拉曼光谱和电子结构计算进行了检查。通过将两个水分子与每个氧位点相关联,对 p,p'-联苯半醌自由基阴离子 (C12H8O2-•) 结构的氢键效应被纳入计算中。预测的结构,环间 CC 键长为 1.455 A,二面角为 17.7°,很好地描述了光谱观察。氢键略微拉长了 CO 键,但其对环间扭曲的影响可以忽略不计。非共面的两个苯环不等价,由 C12H8O2-• 在液态水中以及低温下的乙醇基质中的共振拉曼光谱表明。环之间的 π 共轭在自由基阴离子中很小,但大于其还原的双阴离子 (C12H8O22-) 状态...