Algebraic model of hindered rotations: application to H2O2

The complete dynamics of internal hindered rotations and torsion modes of t etratomic molecules is recovered in the framework of an algebraic approach. This model is capable of providing detailed information for torsion/tunnel and bending levels in a semi-rigid approximation, with special emphasis on intramolecular interaction terms rather than on the construction of effect ive potential functions. We show the most important features of this method by considering as a case study the description of torsion bands in H2O2. ( C) 1999 Elsevier Science B.V. All rights reserved.