The dynamic polarization DP model

This magnetic moment can be pictured as arizing from the induction of electric dipoles in the rest of the molecule (consisting of substituents ), which have component vectors forming a vector product with the position vector from the chromophore origin to that of the substituent. 

The authors applied the model to the VCD of the aliphatic C- H stretching modes of 9,10-dihydrodibenzo[c,g]phenanthrene. The agreement of the experimental spectrum with the calculated one is only good if one takes Fermi resonance into account. 

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