Synthesis and structural and magnetic characterization of an Iron(III) pyrophosphate complex with 1,10′-phenanthroline

Tiffany J. Greenfield, Mark M. Turnbull, Jon Zubieta, Robert P. Doyle

Research output: Contribution to journalArticle


The reaction of 1,10′-phenanthroline (phen), tetrasodium pyrophosphate (Na4PPi) and FeCl2·6H2O in deionized water yielded the iron(III)-PPi chelate complex, {[Hphen][Fe(phen)(H2P2O7)2]·2H2O} (1). Although ferric pyrophosphate is used in applications from food to pharmaceuticals, where PPi, acting as an iron chelator, can inhibit growth, be a source of iron, or facilitate iron transfer, there is little structural information on coordination complexes. Herein, the structure of 1 is described, as well as that of the magnetic properties, which confirm the iron in 1 is present as high spin (S = 5/2) Fe(III).

Original languageEnglish (US)
Article number119084
JournalInorganica Chimica Acta
StatePublished - Dec 1 2019



  • 1,10′-phenanthroline
  • Chelate
  • Iron
  • Pyrophosphate
  • X-ray structure

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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