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

using model chemistry: PBEPBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-168.466819
Energy at 298.15K-168.467746
Nuclear repulsion energy57.650088
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 PBEPBE/6-31G(2df,p)
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' 3663 3625 111.76      
2 A' 2308 2284 95.09      
3 A' 1207 1195 79.19      
4 A' 1076 1065 68.68      
5 A' 457 453 13.08      
6 A" 514 509 2.11      

Unscaled Zero Point Vibrational Energy (zpe) 4612.5 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 4565.0 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 PBEPBE/6-31G(2df,p)
ABC
21.82801 0.34827 0.34280

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.050 1.349 0.000
C2 0.000 0.177 0.000
O3 -0.137 -1.121 0.000
H4 0.745 -1.541 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.17312.47702.9721
C21.17311.30521.8723
O32.47701.30520.9763
H42.97211.87230.9763

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 176.423 C2 O3 H4 109.453
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.399      
2 C 0.392      
3 O -0.339      
4 H 0.345      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.368 -3.628 0.000 3.877
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.862 -2.826 0.000
y -2.826 -17.759 0.000
z 0.000 0.000 -16.429
Traceless
 xyz
x 2.232 -2.826 0.000
y -2.826 -2.114 0.000
z 0.000 0.000 -0.118
Polar
3z2-r2-0.237
x2-y22.897
xy-2.826
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.021 -0.107 0.000
y -0.107 4.307 0.000
z 0.000 0.000 1.800


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000