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All results from a given calculation for HOCN (cyanic acid)

using model chemistry: MP2/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-121G*
 hartrees
Energy at 0K-31.878046
Energy at 298.15K-31.878881
Nuclear repulsion energy30.087479
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/CEP-121G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3744 3567 141.50      
2 A' 2194 2090 69.81      
3 A' 1266 1206 118.50      
4 A' 1046 997 57.72      
5 A' 410 391 15.15      
6 A" 456 434 0.90      

Unscaled Zero Point Vibrational Energy (zpe) 4557.6 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 4342.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2/CEP-121G*
ABC
21.41550 0.33946 0.33416

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.058 1.366 0.000
C2 0.000 0.179 0.000
O3 -0.144 -1.137 0.000
H4 0.745 -1.542 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.18892.51092.9880
C21.18891.32311.8749
O32.51091.32310.9770
H42.98801.87490.9770

picture of cyanic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 O3 176.558 C2 O3 H4 108.255
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability