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Table 2

Potential energies obtained from ab initio calculations and the corresponding fitted values obtained from the Vλ coefficients.

θ R Ab inito Potential energy Potential energy
potential energy (λmax = 12) (λmax = 18)
(°) (bohr) (cm-1) (cm-1) (cm-1)

20 4 4054.680 4055.760 4055.752
5 97.640 97.790 97.827
7 –72.051 –72.007 –72.005
10 –15.204 –15.300 –15.302
50 4 1934.968 1936.702 1935.406
5 –63.556 –63.349 –63.331
7 –70.219 –70.195 –70.195
10 –15.308 –15.430 –15.431
100 4 656.051 652.360 654.926
5 –204.923 –205.221 –205.221
7 –84.609 –84.694 –84.686
10 –17.877 –17.751 –17.748
160 4 18 672.380 18 671.181 18 725.889
5 2519.388 2519.114 2522.812
7 –87.513 –87.349 –87.321
10 –21.762 –21.731 –21.732

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