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

using model chemistry: CCD/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/cc-pVTZ
 hartrees
Energy at 0K-168.397613
Energy at 298.15K-168.398670
HF Energy-167.829874
Nuclear repulsion energy59.454608
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 CCD/cc-pVTZ
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' 3736 3488 156.38      
2 A' 2367 2210 825.46      
3 A' 1358 1268 0.06      
4 A' 825 770 219.22      
5 A' 570 532 112.32      
6 A" 652 609 5.33      

Unscaled Zero Point Vibrational Energy (zpe) 4754.0 cm-1
Scaled (by 0.9337) Zero Point Vibrational Energy (zpe) 4438.8 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 CCD/cc-pVTZ
ABC
27.56039 0.37251 0.36754

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.290 -1.407 0.000
N2 0.330 -1.118 0.000
C3 0.000 0.049 0.000
O4 -0.450 1.118 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00241.94543.0665
N21.00241.21272.3678
C31.94541.21271.1597
O43.06652.36781.1597

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 122.583 N2 C3 O4 172.959
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability