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

using model chemistry: QCISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G
 hartrees
Energy at 0K-167.967779
Energy at 298.15K-167.968411
Nuclear repulsion energy56.439137
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 QCISD/6-31G
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' 3626 3494 89.44      
2 A' 2253 2171 37.53      
3 A' 1266 1219 125.50      
4 A' 981 946 61.25      
5 A' 327 315 15.66      
6 A" 348 335 1.02      

Unscaled Zero Point Vibrational Energy (zpe) 4400.0 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 4239.9 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 QCISD/6-31G
ABC
23.03210 0.33191 0.32719

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -0.016 1.379 0.000
C2 0.000 0.192 0.000
O3 -0.085 -1.151 0.000
H4 0.789 -1.597 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.18712.53143.0829
C21.18711.34621.9553
O32.53141.34620.9809
H43.08291.95530.9809

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 175.626 C2 O3 H4 113.396
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability