Abstract
Three indirect methods have been used to estimate the position of hydroxyl proton resonance of methanol molecules directly interacting with halide ions in electrolyte solutions in methanol. These methods make use of (a) the chemical shift of the hydroxyl proton in the MeOH … halide ion complexes in an inert solvent, (b) the variation of the anion shift with added acetone, and (c) its variation with change of temperature. Using this estimated position of the anion solvation shell and the anion molal shift of a given halide, solvation numbers are calculated for the halides. The results support our previous conclusion that only the short range electrostatic forces need to be considered when discussing electrolyte N.M.R. shifts.
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