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

using model chemistry: MP2=FULL/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-168.252518
Energy at 298.15K-168.253540
HF Energy-167.775221
Nuclear repulsion energy58.483672
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/cc-pVDZ
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' 3706 3522 142.02      
2 A' 2348 2232 508.78      
3 A' 1298 1234 0.09      
4 A' 822 781 209.52      
5 A' 554 527 78.53      
6 A" 619 588 0.72      

Unscaled Zero Point Vibrational Energy (zpe) 4673.9 cm-1
Scaled (by 0.9504) Zero Point Vibrational Energy (zpe) 4442.1 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/cc-pVDZ
ABC
25.58198 0.36090 0.35588

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.564 -1.125 0.000
N2 0.552 -1.050 0.000
C3 0.000 0.054 0.000
O4 -0.678 1.019 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.01481.95823.1023
N21.01481.23402.4073
C31.95821.23401.1800
O43.10232.40731.1800

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 120.789 N2 C3 O4 171.471
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability