Disulfide bonds of 2-isocyanatophenyl methyl disulfide and 2-endo-isocyanato-6-endo-(methyldisulfanyl)bicyclo[2.2.1]heptane showed neighboring group participation in the formation of thiocarbamates. Natural Bond Orbital (NBO) analyses revealed that the unusual nucleophilicity requires a rigid through-space interaction between a lone pair of the disulfide bond and an antibonding orbital of isocyanate
2-isocyanatophenyl methyl disulfide 和 2- endo -isocyanato -6- endo- (methyldisulfanyl)bicyclo[2.2.1]heptane 的二
硫键显示相邻基团参与了
硫代
氨基甲酸酯的形成。自然键轨道 (NBO) 分析表明,不寻常的亲核性需要孤对二
硫键和
异氰酸酯的反键轨道之间存在刚性的空间相互作用。