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 HCNO (fulminic acid)

using model chemistry: B2PLYP=FULL/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 B2PLYP=FULL/cc-pVDZ
 hartrees
Energy at 0K-168.439521
Energy at 298.15K 
HF Energy-168.267044
Nuclear repulsion energy60.054608
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 B2PLYP=FULL/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 3535 3389 266.75 30.37 0.27 0.43
2 Σ 2301 2205 347.52 12.29 0.09 0.16
3 Σ 1304 1249 74.70 25.51 0.29 0.45
4 Π 561 537 1.18 0.32 0.75 0.86
4 Π 561 537 1.18 0.32 0.75 0.86
5 Π 266i 255i 84.46 2.34 0.75 0.86
5 Π 266i 255i 84.46 2.34 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3864.5 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 3704.1 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 B2PLYP=FULL/cc-pVDZ
B
0.37765

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.188
N2 0.000 0.000 -0.014
C3 0.000 0.000 -1.191
H4 0.000 0.000 -2.260

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.20262.37923.4480
N21.20261.17662.2454
C32.37921.17661.0688
H43.44802.24541.0688

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 B2PLYP=FULL/cc-pVDZ
 hartrees
Energy at 0K-168.439979
Energy at 298.15K-168.440683
HF Energy-168.265001
Nuclear repulsion energy60.014549
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 B2PLYP=FULL/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' 3477 3333 186.36      
2 A' 2265 2171 360.69      
3 A' 1308 1254 52.79      
4 A' 555 532 5.07      
5 A' 369 353 156.47      
6 A" 559 536 1.60      

Unscaled Zero Point Vibrational Energy (zpe) 4266.4 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 4089.3 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 B2PLYP=FULL/cc-pVDZ
ABC
90.68785 0.38036 0.37877

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.016 -0.608 0.000
N2 0.000 0.029 0.000
C3 1.068 0.544 0.000
H4 1.715 1.400 0.000

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.19922.38133.3900
N21.19921.18582.1958
C32.38131.18581.0733
H43.39002.19581.0733

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 173.594 N2 C3 H4 152.777
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability