The oxidation of nickelII (1,4,8,11-tetraazacyclotetradecane) by hydroperoxyl radicals: A pulse radiolysis study

Avraham Meshulam, Haim Cohen, Dan Meyerstein

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Hydroperoxyl radicals oxidize NiL2+ in solutions containing SO42- and H2PO4- to (LNiIII(SO4)2) and (LNiIII(H2PO4)2) +. The mechanism of these processes involves mainly the following reactions: NiL2+ + HO2⇆L(H2O)NiIII(HO 2-)2+ L(H2O)NiIII(HO2-)2+ + X- ⇆ LNiIII(X-)(HO2-) + LNiIII(X-)(HO2-)+ + X- + H3O+ → LNiIII(X-)2+ + H2O2 This mechanism differs from that observed for the analogous oxidation of Ni(5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane)2,4. The difference in the mechanisms stems from the difference in the redox potentials of the complexes.

Original languageEnglish
Pages (from-to)266-269
Number of pages4
JournalInorganica Chimica Acta
Issue number1-2
StatePublished - 15 May 1998


  • Azamacrocycle complexes
  • Hydroperoxyl radicals
  • Nickel complexes
  • Oxidation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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