
doi: 10.1007/bf00811739
The general quadratic force field for the in-plane vibrations of isophthalonitrile was calculated by the semi-empirical MINDO/3 method. This force field was refined to the frequencies observed experimentally for isophthalonitrile and isotopic shifts of isophthalonitrile-15N2. The normal coordinates and the force field in internal coordinates were also calculated from the refined field.
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