作者:Sara Jane Rhoads、J.C. Gilbert、A.W. Decora、T.R. Garland、R.J. Spangler、Mary Jane Urbigkit
DOI:10.1016/s0040-4020(01)99237-3
日期:1963.1
their C-methyl derivatives have been prepared and studied in the U.V. and I.R. spectral regions. The enolizable β-ketoesters show a high intensity K band in the 255–263 mμ region associated with the chelated enolic species and two pairs of bands in the 6 μ double bond stretching region which correspond to the structural features of the keto and enol tautomers. The non-enolizable β-ketoesters show only a
在紫外和红外光谱范围内,已经制备并研究了环大小为5-12和15的2-甲氧基环烷酮及其C-甲基衍生物。可烯化的β-酮酸酯在255-263mμ的区域中显示出与螯合的烯醇式物种相关的高强度K谱带,在6μ双键拉伸区域中的两对谱带对应于酮和烯醇互变异构体的结构特征。不可烯化的β-酮酸酯在280-300mμ区域仅显示低强度R谱带,而在6μ区域仅显示一对谱带。光谱性质与烯醇含量和环系统的结构特征有关。螯合烯醇的特征IR频率的趋势已经被注意到并根据螯合结构的几何形状进行了解释。