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: MP4=FULL/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 MP4=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-168.212846
Energy at 298.15K 
HF Energy-167.648528
Nuclear repulsion energy59.310531
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 MP4=FULL/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 3482 3395        
2 Σ 2207 2153        
3 Σ 1256 1225        
4 Π 506 493        
4 Π 506 493        
5 Π 390i 381i        
5 Π 390i 381i        

Unscaled Zero Point Vibrational Energy (zpe) 3588.1 cm-1
Scaled (by 0.9752) Zero Point Vibrational Energy (zpe) 3499.2 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 MP4=FULL/aug-cc-pVDZ
B
0.36826

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/aug-cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.204
N2 0.000 0.000 -0.015
C3 0.000 0.000 -1.207
H4 0.000 0.000 -2.280

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.21882.41053.4840
N21.21881.19172.2652
C32.41051.19171.0735
H43.48402.26521.0735

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 MP4=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-168.214413
Energy at 298.15K-168.215201
HF Energy-167.641256
Nuclear repulsion energy59.173671
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 MP4=FULL/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' 3405 3321        
2 A' 2174 2120        
3 A' 1247 1216        
4 A' 578 564        
5 A' 469 457        
6 A" 526 513        

Unscaled Zero Point Vibrational Energy (zpe) 4199.2 cm-1
Scaled (by 0.9752) Zero Point Vibrational Energy (zpe) 4095.1 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 MP4=FULL/aug-cc-pVDZ
ABC
57.88909 0.37152 0.36915

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.121 -0.422 0.000
N2 0.000 0.047 0.000
C3 1.176 0.323 0.000
H4 1.917 1.108 0.000

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.21572.41503.4020
N21.21571.20762.1911
C32.41501.20761.0800
H43.40202.19111.0800

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 170.490 N2 C3 H4 146.530
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability