本論文是以乙醯□吩與三個不同碳鏈的三胺類化合物為起始物，合成一系列二亞胺二□吩胺基配位子，2,10-二□吩-3,6,9-三氮-2,10-二烯-十一烷(2,2-DIDTA)、2,11-二□吩-3,6,10-三氮-2,11-二烯-十二烷基(2,3-DIDTA)及2,12-二□吩-3,7,11-三氮-2,12-二烯-十三烷基(3,3-DIDTA)，這些化合物分別經由紅外光譜、核磁共振光譜、質譜及元素分析等物理方法鑑定正確結構。
在25.0 ± 0.1°C和離子強度為0.10M (CH3)4NCl時，經由電位滴定法可得到2,2-DIDTA、2,3-DIDTA及3,3-DIDTA等三種配位子的質子化常數，其質子化常數大小會隨著碳鏈數不同而改變﹔同時亦可測得這些配位子的二價銅及鎳錯化合物之穩定常數，發現三個因素會影響穩定常數大小的順序：(1)螯合環大小﹔(2)螯合環的環張力﹔(3)配位基的鹼度。

在25.0 ± 0.1°C和離子強度為0.50M(NaClO4+HClO4)中，利用截止流動法研究這三個有機配位子的銅(II)錯化合物之酸解反應動力學，可發現本實驗之酸解反應有一般酸催化的現象，並且提出銅－氮鍵斷裂的可能途徑，詳細討論影響解離途徑之相對重要性的因素，進一步提出其反應機構，比較其他線形及大環金屬錯合物的解離反應之速率決定步驟，可得知本論文之三個銅(II)錯合物的反應機構，其速率決定步驟為質子的轉移。

最後是利用光譜法，研究Cu(2,2-DIDTA)2+、Cu(2,3-DIDTA)2+及Cu(3,3-DIDTA)2+等錯合物與一價陰離子之單牙配位子的錯合加成反應，並以Rose-Drago方程式求出其平衡常數，而其平衡常數大小，受到銅(II)錯合物的結構及陰離子的軟度、鹼度等因素影響，同時引用Edwards方程式，求出其a、b值及a / b，並與過去的文獻作比較，可知此這三個銅(II)錯合物為軟性的酸。

The diiminedithiophene amine ligands, 2,10-dithiophene-3,6,9-triaza- 2,10-undecadiene (2,2-DIDTA), 2,11-dithiophene-3,6,10-triaza-2,11-do- decadiene (2,3-DIDTA) and 2,12-dithiophene-3,7,11-triaza-2,12-tri- decadiene (3,3-DIDTA) were synthesized. These compounds have been characterized correctly by the study of some physical methods, such as infrared spectroscopy, nuclear magnetic resonance spectroscopy, mass spectroscopy, elemental analysis and so on.
The protonation constants of 2,2-DIDTA, 2,3-DIDTA and 3,3-DIDTA were determined potentiometrically in 10% CH3OH + 90% H2O containing 0.10M (CH3)4NCl and the temperature was maintained at 25.0 ± 0.1ºC. The obtained different values of protonation constants are due to the different number of carbon atoms present in diiminedithiophene amine ligands. At the same time, the stability constants of copper(II) and nickel(II) complexes of these ligands could be determined. It was found that the sequence of stability constants could be influenced by three factors: First, The sizes of chelate rings; Second, the ring strain of the chelate rings; Third, the basicity of the ligands.

The acid dissociation kinetics of diiminedithiophene amine copper(II) complexes have been studied in 0.50M (NaClO4+HClO4) aqueous solution at 25.0 ± 0.1ºC using stopped-flow techniques, and the general acid catalysis phenomenon would be found. The cleavage of Cu－N bond might have some probable pathways. In the current investigation, the factors affecting the relative importance of each of these possible pathways were discussed. The rate-determining step of linear complexes or macrocyclic complexes is discussed. The proton transfer is the rate-determining step in our work.

Finally, the complexes, Cu(2,2-DIDTA)2+, Cu(2,3-DIDTA)2+ and Cu(3,3-DIDTA)2+ were subjected to react with monodentate ligands. Using spectrophotometric method and Rose Drago equation, we obtained their equilibrium constants. The obtained different values of equilibrium constants of complexes are explained by their structures and softness and basicity of monodentate ligands. These constants could be quantitatively correlated by Edwards equation. The values of a, b and a/b for the copper(II) complexes were reported and the factors which influence these values were discussed. Then, we could know that these three copper(II) complexes were soft acid.

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