Combined Experimental and Theoretical Studies on the Radical Nucleophile Addition Reaction for Sulfide- and Selenide-Centered Anions
作者:Lydia M. Bouchet、Alicia B. Peñéñory、Adriana B. Pierini、Juan E. Argüello
DOI:10.1021/acs.jpca.9b02485
日期:2019.6.20
sulfur- and selenium-centered nucleophiles toward 1-naphthyl radicals was studied in dimethylsulfoxide. The photostimulated reaction of sulfide anions, –SC(NH)C6H5 (1), –SC(NH)NH2 (2), and –SC(NH)CH3 (3), renders, after the addition of MeI, methyl 1-naphthylsulfide as a main product together with bis(1-naphthyl) sulfide and naphthalene under irradiation. Concordantly, the reaction of selenide anions, –SeC(NH)C6H5
在二甲亚砜中研究了以硫和硒为中心的亲核试剂对1-萘基的反应性。加入MeI后,硫化物阴离子– SC(NH)C 6 H 5(1),– SC(NH)NH 2(2)和– SC(NH)CH 3(3)的光刺激反应产生。在照射下,以甲基1-萘硫化物为主要产物,与双(1-萘基)硫化物和萘一起。相应地,硒化阴离子-– SeC(NH)C 6 H 5(4),– SeC(NH)NH2(5)和– SeCN(6)在叔丁醇钾阴离子存在的条件下(夹带条件)产生甲基1-萘基硒化物,双(1-萘基)硒化物和萘。绝对速率常数离子的耦合1 - 6确定了1-萘基;作为一般趋势,以硒化物为中心的亲核试剂的活性提高了其硫化物类似物的2倍。从机理研究中,提出了通过将亲核试剂加到1-萘基上而产生的不稳定基团阴离子在断裂后提供1-萘基硫化物/硒化物阴离子。另外,根据密度泛函理论计算讨论了实验结果。实验的反应性与计算的反应性之间通常有很好的一致