The Inversion–Torsion Potential Function for Hydrazine

Competing tunneling trajectories in a two-dimensional potential with variable topology as a model for quantum bifurcations

“…3. Similar considerations are easily applied to the hydrazine molecule with two coupled inversion motions (see [22] and references therein).…”

“…1. The characteristic potential barrier height, V * , for the synchronic two proton transfer in the carbonic acid dimers is V * ≃ (10 − 15) Kcal/mol (5000 -7000 K), while the energy E st corresponding to a step wise transfer (that is paths d 1 = 0 , d 2 = 1 or d 1 = 1 , d 2 = 0) is two or even three times larger [21], [22]. On the other hand, within the frame of our model PES, the ratio E st /V * depends on the controlling parameter α as follows:…”

Rotational Spectrum of Hydrazine in the Submillimeter Range

“…The permutation-inversion group for hydrazine, G (2) 16 , contains elements producing permutations of hydrogen and nitrogen atoms in hydrazine, which result in different statistical weights for different symmetry species (4 These weights are shown in brackets in Fig. 1.…”

The symmetric amino-wagging band of hydrazine: Assignment and analysis

“…The position and structure of this state have been estimated using the three-dimensional potential surface for hydrazine that has been determined in our laboratory from the experimental data for ground, torsion and inversion states [11]. Using an original rotation-torsion-inversion Hamiltonian it was possible to reproduce the inversion-torsional splittings for the J = 0 sublevels.…”

“…Using an original rotation-torsion-inversion Hamiltonian it was possible to reproduce the inversion-torsional splittings for the J = 0 sublevels. Parameters of the inversion-torsion potential function have been fitted to the band centers and splittings for the ground, first and second torsional, and symmetric and antisymmetric inversion states (Table 7 of [11]). The geometric parameters were taken from (15) the microwave data.…”