return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: BLYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/3-21G
 hartrees
Energy at 0K-167.665657
Energy at 298.15K-167.666508
Nuclear repulsion energy56.541220
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 BLYP/3-21G
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' 3280 3262 34.24      
2 A' 2217 2205 40.91      
3 A' 1223 1216 93.82      
4 A' 972 966 71.78      
5 A' 438 435 17.69      
6 A" 461 458 0.37      

Unscaled Zero Point Vibrational Energy (zpe) 4295.0 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 4271.3 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 BLYP/3-21G
ABC
20.65284 0.33547 0.33011

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.070 1.371 0.000
C2 0.000 0.188 0.000
O3 -0.155 -1.140 0.000
H4 0.745 -1.603 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.18472.52123.0497
C21.18471.33751.9402
O32.52121.33751.0117
H43.04971.94021.0117

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 176.763 C2 O3 H4 110.595
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.381      
2 C 0.507      
3 O -0.513      
4 H 0.387      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.669 -3.314 0.000 3.710
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.998 -3.310 0.000
y -3.310 -17.977 0.000
z 0.000 0.000 -16.373
Traceless
 xyz
x 2.177 -3.310 0.000
y -3.310 -2.292 0.000
z 0.000 0.000 0.115
Polar
3z2-r20.229
x2-y22.980
xy-3.310
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.450 -0.165 0.000
y -0.165 4.055 0.000
z 0.000 0.000 1.026


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