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: CCD/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 CCD/6-31G(2df,p)
 hartrees
Energy at 0K-168.290196
Energy at 298.15K-168.291153
Nuclear repulsion energy58.168027
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/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' 3878 3673 153.45      
2 A' 2432 2303 90.69      
3 A' 1296 1228 102.74      
4 A' 1115 1056 57.80      
5 A' 468 443 15.42      
6 A" 527 499 7.48      

Unscaled Zero Point Vibrational Energy (zpe) 4858.1 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 4601.5 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/6-31G(2df,p)
ABC
22.28121 0.35404 0.34850

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.114 1.332 0.000
C2 0.000 0.180 0.000
O3 -0.184 -1.107 0.000
H4 0.671 -1.549 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.15742.45732.9343
C21.15741.30051.8548
O32.45731.30050.9620
H42.93431.85480.9620

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 177.536 C2 O3 H4 109.213
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability