Role of solute structure on the stability of the OH-adduct of substituted organic sulfides and its transformation to a radical cation
作者:V.B. Gawandi、Hari Mohan、Jai P. Mittal
DOI:10.1016/s0009-2614(99)00946-x
日期:1999.12
to a sulfur-centered dimer radical cation (λmax=485 nm) in basic solution. The rate of transformation is accelerated in acidic solution and only the dimer radical cation is observed at pH=1. The transformation of the OH-adduct of 3-(methylthio)propanol is fast even in basic solution and only the intra-molecular radical (λmax=410 nm) is observed at pH>5 and the dimer radical cation (λmax=480 nm) at pH=1
硫为中心的OH加合物(λ最大= 360纳米)的4-(甲硫基)丁醇变换(ķ = 1×10 6小号-1),以硫为中心的二聚体自由基阳离子(λ最大在基本= 485 nm)的解决方案。在酸性溶液中,转化速率加快,在pH = 1时仅观察到二聚自由基阳离子。3-(甲硫基)丙醇的OH加合物的变换是快,即使在碱性溶液和仅分子内自由基(λ最大= 410纳米)在pH> 5和二聚体自由基阳离子观察到(λ最大= 480 pH = 1时)。3,3'- thiodipropionamide(的OH加合物λ最大= 350纳米)经历变换(ķ = 1.4×10 5小号-1),以分子内自由基阳离子(λ最大= 370纳米)。用2-(甲硫基)乙醇和2,2'-硫代二乙酰胺无法观察到OH-加合物的形成及其向溶质自由基阳离子的转化。