m-Iodobenzoic acid complexes with selected metals: molecular structure and antimicrobial activity.

Complexes of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, manganese, and zinc with m-iodobenzoic acid were studied. The FT-IR and FT-Raman spectra of the mentioned compounds in the solid state and water solutions were recorded and analyzed. Principal component analysis (PCA) was performed on the wavenumbers of selected bands (eight bands) occurring in the vibrational spectra. The numbers obtained as a result of this procedure characterize the electronic properties of the molecule of each complex. The antimicrobial activity of the studied compounds against selected bacteria (Escherichia coli and Bacillus subtilis) and yeast (Saccharomyces cerevisiae and Hansenula anomala) was estimated. The relationship between the chemical properties (as characterized by PCA of the IR spectra) and antimicrobial properties of the compounds was examined, and a good correlation between the two factors was found.