波谱学杂志 ›› 1994, Vol. 11 ›› Issue (3): 229-236.

• 研究论文 • 上一篇    下一篇

AlL3-L'及AlL3-AlL3'(L=噻吩甲酰三氟丙酮,L'=乙酰丙酮)体系分子间配体交换的19F NMR研究

唐亚林, 徐国, 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:1993-06-05 修回日期:1993-07-22 出版日期:1994-09-05 发布日期:2018-01-20
  • 基金资助:
    国家自然科学基金资助项目

19F NMR STUDIES OF LIGAND-EXCHANGE REACTION FOR Al(Ttfac)3-acac AND Al(Ttfac)3-Al(acac)3 SYSTEM

Tang Yaling, Xu Guozhen, Xu Guangzhi   

  1. State Key Laboratory for Structure Chemistry of Unstable and Stable Species. Institute of Chemistry, Academid Science, Beijing 100080
  • Received:1993-06-05 Revised:1993-07-22 Online:1994-09-05 Published:2018-01-20

摘要: 本文用19F NMR研究了Al(Ttfac)3-aeac、Al(Ttfac)3-Al(aeac)3体系分子间配体交换反应,其中Ttfac为非对称二齿配体噻吩甲酰三氟丙酮),acac为对称二齿配体乙酰丙酮(反应的平衡常数、自由能,发现这一非对称二齿配体金属络合物与对称二齿配体金属络合物体系的配体交换反应平衡时各物种的摩尔分数服从随机统计分布,并讨论了结构与能量及交换反应平衡程度的关系。

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

Abstract: The ligand-exchange equilibria that are establishcd in Al(Ttfac)3-acac and Al(Ttfac)3 systems,where Ttfac=Theonyltrifluoroaeetone,acac=aeetylaeetonate,have been studied by means of 19F NMR spcctroscopy. For Al(Ttfac)3-acac system,it is found that the distribution of complexes in mixtures accords with the statistical be-havior, For Al(Ttfac)3-Al(acac)3 systcm, the ligand-exchange equlibria may be des-cribed in terms of three indcpendent cqulibria.Equlilbrium constants have been deter-mined in chloroform solution, The relationship between the structure of complexes and energy is discussed in this paper.

Key words: Al (III) comlpexes of Ttfac and acac, 19F NMR, Ligand-dxchange reaction