Ligand Redistribution Equilibria in Aqueous Fluoroberyllate Solutions

Michael Schmidt, Hubert Schmidbaur

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The composition of aqueous fluoroberyllate solutions has been studied by 9Be and 19F NMR spectroscopy for various ratios of the beryllium and fluorine concentrations, and at different pH values. The equilibrium constants have been determined for the ligand exchange processes, which involve the species [Be(OH2)4]2+, [BeF(OH2)3]+2, [BeF2(OH2)2], [BeF3(OH2)]-, and [BeF4]2-. These equilibria are shifted towards [BeF4]2- at high pH. No polynuclear fluoroberyllates have been detected. The fluoride exchange between the individual species is slow on the NMR time scale at room temperature, and separate sharp signals with the expected multiplicity are therefore recorded. Calculated 9Be chemical shifts are in good agreement with experimental data.

Original languageEnglish
Pages (from-to)1294-1300
Number of pages7
JournalZeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
Volume53
Issue number11
DOIs
StatePublished - Nov 1998
Externally publishedYes

Keywords

  • Beryllium Fluoride
  • Fluoroberyllates
  • Ligand Redistribution
  • NMR Data

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