Effect of substituent position and lithium, sodium and potassium on the electronic structure of o-, m- and p-methoxybenzoic acids

FT-IR, FT-Raman, Ar matrix FT-IR, 1H NMR methods and ab initio calculations have been used to study the effect of the substituent position in the ring, and lithium, sodium and potassium ions on the electronic structure of (a, b) o-, (c) m- and (d) p-methoxybenzoic acids. On the basis of the obtained results, we may answer the following: (1) whether the substituents in the benzene ring influence the electronic charge distribution in the carboxylic group of methoxybenzoates, (2) whether metal ions affect the electronic charge distribution in the methoxy group, (3) in what way the alkali metals affect the electronic system of methoxybenzoic acids.