Kinetics and mechanism of the reaction between pentacyanonitrosylferrate(II) and hydroxylamine

István Bányai, László Dózsa, Mihály T. Beck, Gyöngyi Gyémánt

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The kinetics of the reaction between pentacyanonitrosylferrate(II) and hydroxylamine was studied spectrophotometrically and gas volumetrically in moderately alkaline media (pH = 8 -9.5). Reduction of the nitrosyl ligand takes place according to the following stoichiometry: Fe(CN)5NO2- + NH2OH = Fe(CN)5H2O3- + N2O + H+ The aquocomplex catalyses the following two disproportionation reactions of hydroxylamine: 4 NH2OH = N2O + 2NH3 + 2H2O and 3NH2OH = N2 + NH3 + 3H2O Two paths for disproportionation were identified: a fast route, probably via radicals, initiated by a binuclear intermediate yielding N2 or N2O and a slower one through formation of Fe(CN)3NO4- as a stable intermediate yielding N2. A kinetic model was constructed which describes both the reduction of nitrosyl complex and the catalytic disproportionation reactions of hydroxylamine.

Original languageEnglish
Pages (from-to)257-270
Number of pages14
JournalJournal of Coordination Chemistry
Volume37
Issue number1-4
DOIs
Publication statusPublished - Jan 1 1996

Keywords

  • Catalytic disproportionation
  • Hydroxylamine
  • Nitroprusside
  • Pentacyanoammineferrate(II)
  • Pentacyanonitrosylferrate(II)

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Kinetics and mechanism of the reaction between pentacyanonitrosylferrate(II) and hydroxylamine'. Together they form a unique fingerprint.

  • Cite this