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

using model chemistry: HF/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 HF/cc-pVDZ
 hartrees
Energy at 0K-167.779953
Energy at 298.15K-167.781083
Nuclear repulsion energy60.024142
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 HF/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' 3865 3510 182.61      
2 A' 2467 2240 1072.42      
3 A' 1445 1312 0.06      
4 A' 920 836 232.54      
5 A' 598 543 123.57      
6 A" 712 646 24.19      

Unscaled Zero Point Vibrational Energy (zpe) 5003.6 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 4543.3 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 HF/cc-pVDZ
ABC
26.30627 0.38021 0.37479

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.876 -1.661 0.000
N2 0.010 -1.158 0.000
C3 0.000 0.048 0.000
O4 -0.118 1.185 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00141.92033.0151
N21.00141.20582.3469
C31.92031.20581.1437
O43.01512.34691.1437

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 120.644 N2 C3 O4 174.543
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.172 0.376    
2 N -0.351 -0.742    
3 C 0.422 0.805    
4 O -0.243 -0.439    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.736 -1.224 0.000 2.124
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.586 -2.603 0.000
y -2.603 -18.337 0.000
z 0.000 0.000 -16.353
Traceless
 xyz
x 2.759 -2.603 0.000
y -2.603 -2.868 0.000
z 0.000 0.000 0.108
Polar
3z2-r20.217
x2-y23.751
xy-2.603
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.558 -0.292 0.000
y -0.292 3.988 0.000
z 0.000 0.000 1.324


<r2> (average value of r2) Å2
<r2> 34.539
(<r2>)1/2 5.877