作者:Leo F. Clarke、Fiona O'Sullivan、Anthony F. Hegarty
DOI:10.1039/p29910001649
日期:——
E-isomers of aliphatic aldehyde N,N-dimethylhydrazones undergo competing E to Z isomerisation and photolysis to nitriles under UV (254 nm) irradiation. The Z–E isomer mixture which results thermally reverts to the more stable E-isomer and under short irradiation times the photoisomerisation/thermal reversion cycle can be reversible. Trimethylacetaldehyde N,N-dimethylhydrazone undergoes similar reactions (ruling
脂肪醛N,N-二甲基hydr的E-异构体在UV(254 nm)辐射下经历竞争性E - Z异构化和光解成腈。所述ž - ë异构体混合物,这导致热恢复到更稳定的È异构体和下短的辐照时间的光异构化/热循环逆转可以是可逆的。三甲基乙醛N,N-二甲基hydr经历相似的反应(排除其他类型的异构化的干预),RCH的热Z → E反应速率N–NMe 2的顺序为R = Bu t > Et> Me。根据the的构象和E - Z异构化的机理来考虑结果。