Stability of Monofluoride Complexes of the Irving-Williams Series Acceptors in Methanol

L. R. Solomon, A. M. Bond, J. W. Bixler, D. R. Hallenbeck, K. M. Logsdon

Research output: Contribution to journalArticleResearchpeer-review

13 Citations (Scopus)

Abstract

The thermodynamics (K3tab, ΔG1; ΔH1 Δs1,) for the formation of monofluoride complexes, MF1+ (M2+ = Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+), have been studied in methanol and water at an ionic strength of 0.05 M with use of fluoride ion selective electrode potentiometry. These complexes are weak and have very similar stabilities in aqueous medium. However, they are substantially more stable in methanol and definite conclusions may be made concerning trends in stability. Unlike most complexes having nitrogen or oxygen atoms, these fluoride complexes clearly disobey the Irving-Williams stability trend. These complex formation reactions are all distinctly entropy controlled. Although electrostatic considerations play a crucial role, the stability order does not follow the trend predicted by ionic radii.

Original languageEnglish
Pages (from-to)1644-1648
Number of pages5
JournalInorganic Chemistry
Volume22
Issue number11
DOIs
Publication statusPublished - May 1983
Externally publishedYes

Cite this