Infrared Study of Hexahydrophthalic Anhydride, Halogenated Phthalic Anhydrides, Halogenated Maleic Anhydride and Styrene-Maleic Anhydride Copolymer in Solvent Mixtures

Author： Nyquist Richard A.  

Publisher： Society for Applied Spectroscopy

ISSN： 0003-7028

Source： Applied Spectroscopy, Vol.44, Iss.5, 1990-06, pp. : 783-790

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Abstract

The v(C=O)2 modes for carboxylic acid anhydrides decrease in frequency as the solvent solubility parameter value increases. The vout-of-phase (C=O)2 mode for anhydrides decreases more in frequency than the vin-phase (C=O)2 mode in going from CCI4 solution to CHCI3 solution, indicating that it is more difficult for the vin-phase (C=O)2 mode to vibrate than it is for the vout-of-phase (C=O)2 mode in the same solvent system. Solute/solvent interaction induces a change in the Fermi resonance interaction between v(C=O)2 and combination and/or overtones of lower-lying fundamentals as the mole % solvent 1/solvent 2 changes.

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