EPR investigations of a thermally produced Mo(V) species in (NH4)2SnCl6 and K2SnCl6, crystals doped with MoO42-

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Abstract

We have employed the method of electron paramagnetic resonance (EPR) to investigate a Mo(VI) to Mo(V) reduction in (NH4)2SnCl6:MoO42- crystals thermally treated at temperatures below the decomposition temperature of the host compound. A similar Mo(V) species can be thermally produced in K2SnCl6: MoO42- crystals codoped with either the NH4+ or the CH3NH3+ ion, or by placing the crystals inside a polycrystalline mass of one of the following five compounds; namely, NH4Cl, NH4Br, NH4ClO4, (NH4)SO4, and CN3NH2·HCl. The EPR spectrum of this thermally produced Mo(V) species exhibited tetragonal symmetry, a molybdenum hyperfine structure, and a chlorine superhyperfine structure. We tentatively assign the structure of this Mo(V) species to a [MoOCl5]2- complex ion.

Original languageEnglish
Pages (from-to)1131-1137
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Volume53
Issue number8
DOIs
Publication statusPublished - 1992 Jan 1

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Keywords

  • EPR
  • Mo(VI) to Mo(V) thermal reduction
  • solid state reaction

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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