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Raman spectroscopic study of acetone–phenol mixtures

✍ Scribed by S. Šašić; M. Kuzmanović

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
276 KB
Volume
29
Category
Article
ISSN
0377-0486

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✦ Synopsis

Acetone-phenol mixtures with phenol mole fractions in the range 0.079-0.6000 were studied by Raman spectroscopy. Spectra were obtained in the regions of acetone CxO stretching and C-C symmetric stretching bands. Principal factor analysis applied to the set of CxO stretching bands revealed two independent components belonging to free and hydrogen-bonded acetone. Interaction with phenol produces a new band at a lower wavenumber in the CxO vibration region and an additional band at a higher wavenumber in the C-C symmetric stretch region. These changes were explained by charge delocalization induced by the hydrogen bond. On applying band deconvolution and target factor analysis, it was deduced that the equilibrium constant K of 1 : 1 acetone-phenol complex formation is too high to be determined by Raman spectroscopy in the range 0.079-0.400 mole fraction of phenol. At equal mole fractions of acetone and phenol, values of K = 2.61 and 3.22 dm3 mol-1 were obtained by deconvolution and target factor analysis, respectively. An investigation of ternary solutions with an inert solvent showed no signiÐcant di †erences in acetone-phenol interaction between this system and binary mixtures.

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