Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Calculated Frequencies for N₃P₃ (1,3,5,2,4,6-Triazatriphosphorine) ¹A₁^' D_3h

QCISD/Def2TZVPP ¹A₁^' D3H

Unscaled Zero Point Vibrational Energy (zpe) 3682 cm^-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3682 cm^-1

See section Calculated; Vibrations; Scale Factors; Set scaling factors to change the scale factors used here.
See section Calculated; Vibrations; Scale Factors; Calculate a scale factor to determine the least squares best scaling factor.

List of Irreducible Representations for D_3h