作者:S.T. Yoffe、E.M. Popov、K.V. Vatsuro、E.K. Tulikova、M.I. Kabachnik
DOI:10.1016/s0040-4020(01)92746-2
日期:1962.1
densities of absorption bands assigned to cis- and trans-enolic forms were used. The data obtained led to the conclusion that cis-enolization of 3-alkylacetylacetones follows Meyer's rule whereas trans-enolization is independent of the nature of the solvent. The overall enolization is expressed as KT = EL + E1. The specificity of β-dicarbonyl compounds as a particular chemical type in terms of the Brønsted-Izmailov
研究了溶剂对一系列3-烷基乙酰丙酮的酮-顺-反-烯醇平衡位置的影响。1%溶液的放热和IR证据给出了良好的定性图,但由于稀释不足,无法阐明相关的定量规律。后者是通过研究稀释至10 -4 m / l的UV光谱来实现的。作为互变异构形式浓度的度量,使用了分配给顺式和反式烯醇式的吸收带的积分密度。获得的数据得出结论,即3-烷基乙酰丙酮的顺式烯醇化遵循Meyer规则,而反式-烯丙基化与溶剂的性质无关。总体烯醇化表示为K T = EL + E 1。根据布朗斯台德-伊兹麦洛夫理论,讨论了β-二羰基化合物作为特定化学类型的特异性。