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All results from a given calculation for HNCO (Isocyanic acid)

using model chemistry: MP2=FULL/6-311G*

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=FULL/6-311G*
 hartrees
Energy at 0K-168.351051
Energy at 298.15K-168.352083
HF Energy-167.802186
Nuclear repulsion energy58.958988
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=FULL/6-311G*
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' 3753 3555 154.67      
2 A' 2374 2249 559.74      
3 A' 1314 1244 0.23      
4 A' 791 749 260.09      
5 A' 576 546 94.62      
6 A" 635 602 0.80      

Unscaled Zero Point Vibrational Energy (zpe) 4721.9 cm-1
Scaled (by 0.9471) Zero Point Vibrational Energy (zpe) 4472.1 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=FULL/6-311G*
ABC
29.89301 0.36547 0.36105

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.497 -1.247 0.000
N2 0.512 -1.054 0.000
C3 0.000 0.053 0.000
O4 -0.635 1.039 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00381.98243.1251
N21.00381.21952.3860
C31.98241.21951.1723
O43.12512.38601.1723

picture of Isocyanic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 N2 C3 125.883 N2 C3 O4 172.021
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability