Formation of the intermediate, aquohydroxobis (ethylenediamine)cobalt(III) complex, in the preparation of cis-bromoamminebis (ethylenediamine)cobalt(III) bromide by the reaction of bis[bis(ethylenediamine)cobalt(III)-μ-dihydroxo]diaquocobalt(II) sulfate with ammonium bromide in water

Kouichi Asakura, Kazuya Inoue, Shuichi Osanai, Dilip K. Kondepudi

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13 Citations (Scopus)

Abstract

The production of cis-[CoBr(NH3)(en)2]Br2 by reaction of [Co(H2O)2{(OH)2Co(en)2} 2](SO4)2 with ammonium bromide in water was investigated. The reaction seems to proceed through the intermediate. [Co(H2O)(OH)(en)2]2+, and then convert to the product, cis-[CoBr(NH3)(en)2]2+. This is supported by the observation that the absorption spectrum of the reaction solution immediately after the disappearance of the starting complex was different from that of cis-[CoBr(NH3)(en)2]2+ but was quite similar to that of [Co(H2O)(OH)(en)2]2+. In order to confirm this reaction pathway, cis-[Co(H2O)(OH)(en)2]Br2 was prepared and reacted with ammonium bromide producing the expected complex, cis-[CoBr(NH3)(en)2]Br2.

Original languageEnglish
Pages (from-to)159-164
Number of pages6
JournalJournal of Coordination Chemistry
Volume46
Issue number2
DOIs
Publication statusPublished - 1998 Jan 1

Keywords

  • Ammonium bromide
  • Cobalt
  • Ethylenediamine
  • Intermediate
  • Reaction mechanisms

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry

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