CITRATE COMPLEXES WITH IRON(II) AND IRON(III)
CITRATE COMPLEXES WITH IRON(II) AND IRON(III)
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DOI：
10.1021/ja01637a021
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发表时间：
1954-01-01
影响因子：
15
通讯作者：
GRANT, DM
中科院分区：
文献类型：
--
作者：
HAMM, RE;SHULL, CM;GRANT, DM
在离子强度 1.0 下，高氯酸铁 (II) 和柠檬酸 1:1 混合物的 pH 滴定结果表明，铁 (II) 与柠檬酸盐的络合物可能配制为 FeHCit、FeCit" 和 FeOHCit"。已经计算了这些配合物的形成常数。在离子强度1.0下，高氯酸铁(III)和柠檬酸在1:1混合物中的pH滴定结果表明，柠檬酸铁(III)络合物可以配制为FeHCit+、FeCit、FeOHCit-和Fe(OH)2Cif。已经计算了这些配合物的形成常数。对过量柠檬酸盐中的铁 (II)-铁 (III) 混合物在离子强度 1.0 下的极谱测量表明涉及两个单独的还原过程。先前计算的形成常数与极谱法获得的数据一致，并且可逆极谱过程与确定的反应有关。许多不同的研究者对铁(III)的柠檬酸盐配合物进行了研究，但结果差异很大。 Bobtelsky 和 Jordan2 试图将柠檬酸铁 (III) 的电导率滴定中断与络合离子组成联系起来，但 Bertin3 已经认识到氢离子浓度的变化和
The results of pH titrations of iron (II) perchlorate and citric acid in 1: 1 mixture, at ionic strength 1.0, showed that the iron (II) complexes with citrate may be formulated as FeHCit, FeCit" and FeOHCit”. The formation constants of these complexes have been calculated. The results of pH titrationsof iron (III) perchlorate and citric acid in 1: 1 mixture, at ionic strength 1.0, showed that the iron (III) complexes with citrate may be formulated as FeHCit+, FeCit, FeOHCit- and Fe (OH) 2Cif. The formation constants of these complexes havebeen calculated. Polarographic measurements on iron (II)-iron (III) mixtures in excess citrate, at ionic strength 1.0, demonstrated that two separate reduction processes are involved. The formation constants previously calculated were shown to be consistent with the data obtained polarographically, and the reversible polarographic processes were related to definite reactions.Many different investigators have studied the citrate complexes ofiron (III) with results which differ considerably. Bobtelsky and Jordan2 have attempted to relate the breaks in the conductivity titration of iron (III) with citrate to the complex ion composition, but Bertin3 has recognized that the change in the hydrogen ion concentration and