Sm. Colwell et Nc. Handy, THE DERIVATION OF VIBRATION-ROTATION KINETIC-ENERGY OPERATORS IN INTERNAL COORDINATES .2., Molecular physics, 92(2), 1997, pp. 317-330
A new method of deriving vibration-rotation kinetic energy operators i
n internal coordinates is applied to tetratomic molecules. This method
dispenses with the ue of Euler angles, and is a great simplification
of the previously used approach.