配合物稳定性和配体酸碱强度之间的直线自由能关系──Ⅰ.二价过渡全属离子—α—氨基酸水杨醛席夫碱二元体系 |
LINEAR FREE ENERGY RELATIONSHIP BETWEEN STABILITY OF COMPLEX AND BASICITY OF LIGAND──Ⅰ. SOME BIVALENT TRANSITION METAL IONS-SCHIFF BASE DERIVED FROM α-AMINO ACID AND SALICYLALDEHYDE BINARY COMPLEXES SYSTEM |
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摘要: 在25±0.1℃,I=0.1mol·dm-3KNO3条件下,应用pH法测定了水杨醛缩α-氨基酸 的酸离解常数及它们与Mn(Ⅱ)、Co(Ⅱ)、Ni(Ⅱ)、Cu(Ⅱ)、Zn(Ⅱ)生成的二元配合物的稳定常数.结果表明,对于同一种配体,配合物的稳定性均符合金属离子的欧文-威廉序;对于同一种金属离子,在配合物稳定性与配体的碱性之间均存在良好的直线自由能关系. |
关键词: 稳定常数 自由能关系 席夫碱 |
基金项目: 山东省自然科学基金 |
Abstract: The dissociation constants of Schiff base derived from α-amino acid and salicylaldehyde and formation constants of their Mn(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Cu(Ⅲ), Zn(Ⅱ)binary complexes were determined by pH method at 25±0.1℃ in the presence of 0.1mol·dm-3KNO3 The results show that the stability of binary complexes accord with the Irving-Williams order of metal ions for the same ligand and linear free energy relationship(LFER)between stability of complex and basicity of ligand exist nicely for each metal ion. |
Keywords: atability constant free energy relationship Schiffbase |
投稿时间:1995-02-21 |
摘要点击次数: 1568 |
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李延团,刘树祥,田君濂,田来进,高恩庆,毕思玮.配合物稳定性和配体酸碱强度之间的直线自由能关系──Ⅰ.二价过渡全属离子—α—氨基酸水杨醛席夫碱二元体系[J].无机化学学报,1995,11(4):434-437. |
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