Salt effects on the reactivity of the base-catalyzed hydrolysis of some novel low-spin hydrophobic Fe(II)–amino acid azomethine chelates

✍ Scribed by Ali M. Shaker; Lobna A. E. Nassr

• Publisher: John Wiley and Sons
• Year: 2003
• Tongue: English
• Weight: 281 KB
• Volume: 35
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.10156

✦ Synopsis

Abstract

Salt effects on the reactivity of base hydrolysis of Fe(II) chelates [naphthylideneisoleucinate (nili), naphthylideneleucinate (nli), naphthylideneserinate (nsi), salicylideneisoleucinate (sili), salicylideneleucinate (sli), salicylidenemethioninate (smi), and salicylidenetryptophanate (sti)] have been investigated in aqueous media containing alkali metal halides and tetra‐n‐butylammonium bromide (TBAB). NaCl and NaBr exhibited different reactivity trends from those of KBr and TBAB.

The observed patterns vary markedly with complex hydrophobicity. Generally, the presence of the salt markedly enhances the rate compared to its absence. This behavior agrees with the anionic nature of the transient species. With increasing added NaCl and NaBr, the rate of the reaction decreases. The rate decreases and then increases on increasing the concentration of KBr and TBAB. © 2003 Wiley Periodicals, Inc. Int J Chem Kinet 35: 592–601, 2003