波谱学杂志 ›› 1995, Vol. 12 ›› Issue (3): 277-282.

• 研究论文 • 上一篇    下一篇

金属络合物分子间交换反应的核磁共振研究Ⅲ.噻吩甲酰三氟丙酮铝与苯甲酰丙酮铝体系分子间配体交换的19F NMR研究

唐亚林, 王玉珍, 徐广智   

  1. 中国科学院化学研究所分子动态与稳态结构化学国家重点实验室, 北京 100080
  • 收稿日期:1994-08-18 修回日期:1994-10-20 出版日期:1995-06-05 发布日期:2018-01-17
  • 基金资助:
    国家自然科学基金

NMR STUDIES ON LIGAND-EXCHANGE REACTION FOR Al(Ttfac)3-Al(bzac)3 System

Tang Yalin, Wang Yuzhen, Xu Guangzhi   

  1. State Key Laboratory for Structure Chemistry of Unstable and Stable Species, Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080
  • Received:1994-08-18 Revised:1994-10-20 Online:1995-06-05 Published:2018-01-17

摘要: 19F NMR研究了噻吩甲酰三氟丙酮铝与苯甲酰丙酮铝体系分子间的团体交换反应,求得了交换反应的平衡常数及自由能,结果表明交换反应有利于混合配体络合物生成,平衡时混和溶液中各组分分布偏离统计分布。

关键词: Al (Ⅲ)的Ttfac、bzac络合物, 19F NMR, 分子间的配体交换反应

Abstract: The ligand-exchange equilibria that are established in Al (Ttfac) 3-Al (bzac) 3 system,where Ttfac=Theonyltrifluoroacctone,bzac=benzoylacetone,have been studied by means of 19F NMR spectroscopy.The ligand-exchange equilibria may be described in terms of two independent cquilibria.Equilibrium constants for formation of each mixed-ligand complexes from the parent complexes have been determined.It is found that the mixed complexes are favored at the expense of parent complexes.Deviations from a statistical distribution of ligand are relatcd to geometric isomers in complexes.

Key words: Al (Ⅲ) complexes of Ttfac and bzac, 19F NMR, Intermolecular ligand-exchange reaction