Solvent effects on the stability of mixed ligand complexes

N. Yellin*, Y. Marcus

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The effect of solvents on the equilibrium MX42- + Y- ⇋ MYX32- + X-, where M = Cd2+ or Hg2+ and X and Y = Cl-, Br-, I-, or CN-, has been studied by quantitative Raman spectrophotometry. This technique, employing LiClO4 as internal reference, permits the direct determination of the decrease in concentration of the tetrahedral MX42- due to the formation of MYX32-. The fraction [1 - α(MX42-)] is thus a direct measure of the solvent effect on the mixed complex stability. It is shown that bulk solvent properties are not relevant, and only solvent molecules in the immediate vicinity of the anionic complex have an effect on its stability. Selective solvation in this second coordination sphere is exhibited by several solvents, and water is not always the preferred solvent.

Original languageEnglish
Pages (from-to)1325-1330
Number of pages6
JournalJournal of Inorganic and Nuclear Chemistry
Volume36
Issue number6
DOIs
StatePublished - Jun 1974

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