作者:Z. Yoshida、H. Ogoshi
DOI:10.1016/s0040-4020(01)93119-9
日期:1970.1
of the cyclopropyl group on the chelate ring of β-diketone at the ground and excited states has been investigated by means of the spectroscopic methods. The spectral data of enolic β-diketones substituted with cyclopropyl group have been compared with those of the corresponding isopropyl substituted β-diketones. The chemical shift of −CH = proton of the chelate ring has been observed at lower magnetic
通过光谱方法研究了环丙基对β-二酮螯合环在基态和激发态的π共轭作用。已经比较了被环丙基取代的烯丙基β-二酮的光谱数据与相应的异丙基取代的β-二酮的光谱数据。已在较低的磁场下通过环丙基的取代观察到-CH =螯合物环的质子的化学位移。根据不对称β-二酮中烯醇结构的偏爱来解释-OH质子化学位移的变化。π→π *的红移烯醇环的过渡带表明,在激发态比在基态发生更多的稳定作用。与烯醇化的β-二酮相比,环丙基对β-二酮的铜(II)螯合物的结合作用似乎很小。