Fifth Electronic Computational Chemistry Conference Paper 62.
VIBRATIONS and VRT DYNAMICS of the AMMONIA DIMER : A FURTHER ANALYSIS.


8th VIBRATION MODE.





fig n°10
Antigeared Umbrella Motions




The barrier through which interchange tunneling dynamics might occur should be quite high, since the PES saddle point along this valey is likely to feature two facing hydrogen atoms, even if Cs symmetry is broken. A similar saddle point geometry has been studied for the (HF)2 dimer [Hougen 85] , and no spliting could be assigned experimentally to such a dynamics. Interchange tunneling dynamics seems therefore unlikely along this PES valley.







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