Nitrene-carbene rearrangement during photolysis of 2-azido-1,3,5-triazines in argon matrices
作者:S. V. Chapyshev
DOI:10.1007/s11172-011-0352-z
日期:2011.11
It was shown using IR spectroscopy and ESR spectroscopy that UV irradiation of 2-azido-4,6-dichloro-1,3,5-triazine isolated in solid argon resulted in triplet 4,6-dichloro-1,3,5-tri-azinyl-2-nitrene (D = 1.384 cm−1, E = 0.004 cm−1), whose further photochemical transformation included the consecutive formation of 3-didehydro-1,2,4,6-tetraazepine, 2-chloro-1-diazochloromethyl-2-isocyanocarboimide, and presumably triplet 2-chloro-1-chloromethyl-idene-2-isocyanocarboimide and isocyanodichloroacetonitrile. The photolysis of 2-azido-4,6-dimethoxy-1,3,5-triazine and 2-azido-4,6-di(dimethylamino)-1,3,5-triazine affords photo-chemically stable triplet 4,6-dimethoxy-1,3,5-triazinyl-2-nitrene (D = 1.436 cm−1, E = 0.0044 cm−1) and 4,6-bis(dimethylamino)-1,3,5-triazinyl-2-nitrene (D = 1.468 cm−1, E = 0.0042 cm−1) as the final products.
利用红外光谱和 ESR 光谱显示,紫外线照射固态氩气中分离出的 2-叠氮-4,6-二氯-1,3,5-三嗪,会产生三重 4,6-二氯-1,3,5-三嗪基-2-硝基苯乙烯(D = 1.384 cm-1,E = 0.004 cm-1),其进一步的光化学转化包括连续生成 3-二脱氢-1,2,4,6-四氮杂卓、2-氯-1-重氮氯甲基-2-异氰脲酰亚胺,以及推测的三重 2-氯-1-氯甲基-2-异氰脲酰亚胺和异氰基二氯乙腈。光解 2-叠氮-4,6-二甲氧基-1,3,5-三嗪和 2-叠氮-4,6-二(二甲基氨基)-1,3,5-三嗪可得到光化学性质稳定的三重 4,6-二甲氧基-1,3,5-三嗪基-2-硝基苯(D = 1.436 cm-1,E = 0.0044 cm-1)和 4,6-双(二甲基氨基)-1,3,5-三嗪基-2-芘(D = 1.468 cm-1,E = 0.0042 cm-1)作为最终产物。