The Sulfuranyl Radical Structure and Reactions of<i>o</i>-(Thio)benzoyloxyl Radicals Formed by the Decomposition of<i>t</i>-Butyl<i>o</i>-(Thio)perbenzoates Studied by<sup>1</sup>H and<sup>13</sup>C CIDNP and<sup>17</sup>O NMR
作者:Waro Nakanishi、Yoshiaki Kusuyama、Yoshitsugu Ikeda、Hiizu Iwamura
DOI:10.1246/bcsj.56.3123
日期:1983.10
1H and 13C CIDNP signals were observed in the methyl group of o-(methylthio)benzoic acid and the methylene group of 3,1-benzoxathian-4-one (6) during the thermal decomposition of t-butyl o-(methylthio)perbenzoate. The results show that the free “o-(methylthio)benzoyloxyl radical” itself is better represented as the bridged sulfuranyl radical in which most of the spin density is localized at the sulfur
在邻(甲硫基)过苯甲酸叔丁酯的热分解过程中,在邻(甲硫基)苯甲酸的甲基和 3,1-苯并氧噻吩-4-酮 (6) 的亚甲基中观察到 1H 和 13C CIDNP 信号. 结果表明,游离的“o-(甲硫基)苯甲酰氧基”本身更好地表示为桥接硫酰基,其中大部分自旋密度位于硫原子而不是羧基。对叔丁基邻(甲硫基)-和邻(苯硫基)过苯甲酸酯-羰基-17O 进行热解,并通过 17O NMR 光谱优先在 6 的羰基氧和 2,2'-二硫代二苯甲酸二苯酯处检测氧标记排除两性离子自由基结构。还讨论了苯基的迁移和邻(苯硫基)苯甲酸的过氧单硫酸盐氧化。