Abstract
Complexation in the acetone-phenol system and the effect of water on the ionic-molecular interaction in the acetone-phenol-H2SO4 system at 30‡C were investigated by MFTIR (multifrustrated total internal reflection) IR spectroscopy. Acetone and phenol form a 1∶1 complex (PAC-l). In an excess of acetone, all of the phenol is bound with this complex, and a 2∶1 complex (PAC-2) is formed in an excess of phenol. Relatively small amounts of H2O virtually do not decompose PAC-1. A broad continuous absorption band due to the formation of complexes with a strong quasisymmetric H bond is observed in the IR spectra of solutions with H2SO4. Quasi-ion pairs HOSO2O...H...OC-(CH3)2, are formed in an anhydrous system. The acid-solvent complexes decompose and (H2O...H...OH2)+ ions are formed on addition of water. The continuous absorption coefficients, e2000, of (H2O...H...OH2)+ ions and quasi-ion pairs were determined.
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