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All results from a given calculation for HCNO (fulminic acid)

using model chemistry: CCSD(T)/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no C*V 1Σ
1 2 yes CS 1A'

Conformer 1 (C*V)

Jump to S1C2
Energy calculated at CCSD(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-168.193048
Energy at 298.15K 
HF Energy-167.651619
Nuclear repulsion energy59.532618
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 CCSD(T)/aug-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 Σ 3475 3345        
2 Σ 2235 2151        
3 Σ 1237 1191        
4 Π 516 497        
4 Π 516 497        
5 Π 246i 237i        
5 Π 246i 237i        

Unscaled Zero Point Vibrational Energy (zpe) 3744.0 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 3603.6 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 CCSD(T)/aug-cc-pVDZ
B
0.37129

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/aug-cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.201
N2 0.000 0.000 -0.020
C3 0.000 0.000 -1.199
H4 0.000 0.000 -2.273

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.22042.39963.4739
N21.22041.17922.2536
C32.39961.17921.0743
H43.47392.25361.0743

picture of fulminic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C3 180.000 N2 C3 H4 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCSD(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-168.193460
Energy at 298.15K-168.194073
HF Energy-167.646919
Nuclear repulsion energy59.508818
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 CCSD(T)/aug-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' 3429 3300        
2 A' 2192 2109        
3 A' 1251 1204        
4 A' 514 495        
5 A' 339 326        
6 A" 516 496        

Unscaled Zero Point Vibrational Energy (zpe) 4120.2 cm-1
Scaled (by 0.9625) Zero Point Vibrational Energy (zpe) 3965.7 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 CCSD(T)/aug-cc-pVDZ
ABC
86.74607 0.37429 0.37268

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -0.992 -0.667 0.000
N2 0.000 0.036 0.000
C3 1.047 0.600 0.000
H4 1.652 1.492 0.000

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.21572.40063.4138
N21.21571.18952.2025
C32.40061.18951.0782
H43.41382.20251.0782

picture of fulminic acid state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 N2 C3 172.987 N2 C3 H4 152.432
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability