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

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-167.107002
Energy at 298.15K-167.107782
Nuclear repulsion energy56.628899
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 QCISD/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' 3494 3386 58.01      
2 A' 2272 2202 23.05      
3 A' 1295 1255 115.12      
4 A' 973 943 61.85      
5 A' 403 390 17.08      
6 A" 412 399 5.95      

Unscaled Zero Point Vibrational Energy (zpe) 4423.8 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 4287.5 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 QCISD/3-21G
ABC
21.14064 0.33540 0.33016

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.164 1.360 0.000
C2 0.000 0.194 0.000
O3 -0.223 -1.132 0.000
H4 0.636 -1.634 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.17732.52223.0308
C21.17731.34501.9355
O32.52221.34500.9950
H43.03081.93550.9950

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 178.469 C2 O3 H4 110.721
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability