| 配合物的稳定性与配体酸碱强度之间的直线自由能关系 Ⅺ.铜(Ⅱ)-5-取代邻菲罗啉-α-氨基酸三元体系 |
| LINEAR FREE ENERGY RELATIONSHIPS BETWEEN THE STABILITY OF COMPLEXESAND THE BASICITY OF LIGANDS XI COPPER(II)-5-SUBSTITUTED-1,10-PHENANTHROLINE-α-AMINOACIDS TERNARY SYSTEMS |
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| 摘要: 在25.0±0.1C和0.1mol·dm-3KNO3存在下,用pH法测定了邻菲罗啉、5-硝基邻菲罗啉、5-氯邻菲罗啉、5-甲基邻菲罗啉为第一配体;脯氨酸、α-氨基异丁酸、异亮氨酸、缬氨酸、甘氨酸、丝氨酸为第二配体与铜(Ⅱ)形成三元配合物的稳定常数,结果表明三元配合物的稳定性与第一配体和第二配体的酸碱强度之间均存在直线自由能关系,应用反馈π键存在的程度讨论了配合物稳定性的变化趋势。 |
| 关键词: 直线自由能关系 5-取代邻菲罗啉 α-氨基酸 铜(Ⅱ) |
| 基金项目: |
| Abstract: The stability constants of the ternary systems of copper(Ⅱ) with 5-substituted phenanthrolines (1,10-phenanthroline, 5-nitro-1,10-phenanthroline, 5-chloro-1.10-phcna nthroline or 5-methyl-1,10-phenanthroline as the first ligand and with α-aminoacids (proline, α-aminoisobutyric acid, isoleucine, valine, glycine or senne) as the second ligand have been determined by potentiometric titration in aqueous solution at 25℃ and I=0.1 mol·dm-3KNO3. The results showed that some linear free energy relationships are found to exist between the stability of the ternary complexes and the base strengths of the first ligands and the second ligands as well. The tendency of stability of the ternary complexes may be accounted for by the formation of dπ-pπ back bonding between copper(Ⅱ) and 5-substituted-1,10-phenanthroline. |
| Keywords: linear free energy relationship 5-substituted-1,10-phenanthroline a-aminoacid copper |
| 投稿时间：1988-01-20 |
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| 陈荣悌,林华宽,朱俊英.配合物的稳定性与配体酸碱强度之间的直线自由能关系 Ⅺ.铜(Ⅱ)-5-取代邻菲罗啉-α-氨基酸三元体系[J].无机化学学报,1990,6(2):171-175. |
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