摘要
本文用￣（１９）ＦＮＭＲ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（ＣＨ＿３－Ｃ－ＣＨ＿２－Ｃ－ＣＨ＿３）．实验结果证实了新物种的产生，求得了交换反应的平衡常数、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。
The ligand-exchange equilibria that are establishcd in Al（Ttfac）_3-acac andAl（Ttfac）_3 systems，where Ttfac = Theonyltrifluoroaeetone，acac = aeetylaeetonate，have been studied by means of ^(19)F NMR spcctroscopy． For Al（Ttfac）_3-acac system，itis 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 andenergy is discussed in this paper。
出处
《波谱学杂志》
CAS
CSCD
1994年第3期229-236,共8页
Chinese Journal of Magnetic Resonance
基金
国家自然科学基金
关键词
金属络合物
铝
NMR
配体交换
Al（III） comlpexes of Ttfac and acac，^(19)F NMR，Ligand-dxchange reaction
