Abstract

The thermochemical stability of hydrogen rings is studied using ab initio SCF-CI methods. The rings include H 3 + , H 4 , H 5 + , H 5 - , H 6 , H 7 + , and H 8 . Optimized geometries for the D nh rings are reported at theoretical levels from SCF to multireference CI. Vibrational frequencies are reported at the optimized geometries, in order to establish whether the ring geometries are absolute minima, relative minima, or saddle points on the potential surface

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