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

using model chemistry: CID/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-167.071421
Energy at 298.15K-167.072272
Nuclear repulsion energy57.221306
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 CID/3-21G
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' 3622 3374 86.35      
2 A' 2400 2236 38.19      
3 A' 1315 1225 123.45      
4 A' 1030 960 68.67      
5 A' 433 403 19.37      
6 A" 445 415 8.18      

Unscaled Zero Point Vibrational Energy (zpe) 4622.0 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 4305.9 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 CID/3-21G
ABC
21.86791 0.34234 0.33706

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.154 1.347 0.000
C2 0.000 0.194 0.000
O3 -0.214 -1.121 0.000
H4 0.632 -1.629 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.16332.49493.0139
C21.16331.33181.9291
O32.49491.33180.9865
H43.01391.92910.9865

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 178.373 C2 O3 H4 111.766
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability