- 作者: 張儀尊; 劉天芝; 魏蘊聰; 龔文勝; 孫文琴
- 作者服務機構: Contribution from the Department of Chemistry, National Taiwan University
- 中文摘要: Additional evidences have been found to support the view that two of the crystalline products resulting from the reaction between iodoacetic ester and disodiosuccinosuccinic ester, those with melting points 106° and 60°, consisted of stereoisomers. In the first place, the infrared spectra of both substances bear close resemblance Secondly, the keto acids that were obtained by ketonic cleavage of these substances could be converted into identical products and, when reduced by the Wolff-Kishner method modified by Huang Minlon, they furnished the same cyclohexane-1, 4-bis-[acetic acid]. The determination of the molar polarization of the crystalline substances at different temperatures showed that neither the substance with m. p. 106° nor that with m. p. 60° had a center of symmetry in its molecule. These substances also had almost equal dipole moments. These results are briefly discussed. The decomposition reactions of the substances with m. p. 106° and 60° when heated with sodium iodide have been found to be a general reaction characteristic of β-ketonic esters.
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