Kinetics of Multidentate Ligand Substitution Reactions. XV. Substitution Reactions of 1,2-Cyclohexanediamine-<I>N</I>,<I>N</I>,<I>N</I>′,<I>N</I>′-tetraacetic Acid (CyDTA) with Zinc(II) Iminodiacetate (IDA), <I>N</I>-(2-Hydroxyethyl)iminodiacetate (HIDA),

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• The kinetics of the substitution reactions of CyDTA with zinc(II)-IDA, -HIDA, and -NTA complexes and those with cobalt(II)-IDA, -HIDA, -NTA, -EtEN, and Dien complexes were studied by using the polarographic technique. All the substitution reactions studied in this paper were found to have a common reaction mechanism. They were first-order with respect to the CyDTA anion, and they were also first-order with respect to the metal(II) complex with a 1 : 1 composition; their reaction mechanism could be formulated as:<BR>(<U>Remark: Graphics omitted.</U>)<BR>From a comparison of the observed rate constants with those estimated on the basis of the proposed reaction intermediate, the detailed reaction mechanism and structures of the reaction intermediates were discussed. The steric effect of the cyclohexane ring on the rate of the substitution reaction was also discussed.

• 公益社団法人 日本化学会の論文

著者

• Kodama Mutsuo

  Department Of Chemistry College Of General Education Hirosaki University

• Hagiya Kaoru

  Department of Chemistry, Faculty of Science, Ibaraki University

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