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

using model chemistry: MP2/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-168.372920
Energy at 298.15K-168.373817
HF Energy-167.795048
Nuclear repulsion energy57.804229
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/Def2TZVPP
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' 3809 3624 175.95      
2 A' 2260 2150 81.20      
3 A' 1252 1191 91.21      
4 A' 1080 1028 67.17      
5 A' 441 420 13.96      
6 A" 486 463 2.26      

Unscaled Zero Point Vibrational Energy (zpe) 4664.2 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 4438.0 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/Def2TZVPP
ABC
22.22380 0.34967 0.34425

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.129 1.335 0.000
C2 0.000 0.178 0.000
O3 -0.000 -1.121 0.000
H4 0.906 -1.448 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.16492.45952.9699
C21.16491.29841.8613
O32.45951.29840.9635
H42.96991.86130.9635

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 173.626 C2 O3 H4 109.869
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability