Solvent effect on the infrared spectra of chromium, molybdenum and tungsten hexacarbonyls

Abstract EN

Solutions of chromium, molybdenum and tungsten hex carbonyls in n-hexane, carbon tetrachloride, cyclohexane, ethanol, methanol, aniline, carbon disulphide, isopropyl alcohol and chloroform have been carefully prepared and their I.

R.

spectra have been recorded.

The carbonyl group frequencies on the three metal carbonyls are observed to be shifted to lower frequency as predicted by the dielectric theory assumptions for non-polar solutes and non-polar solvents.

Frequency shifts due to polar solvents contradict the dielectric theory as some other factors e.

g.

H-bonding, might be involved.