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

using model chemistry: MP4/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/aug-cc-pVDZ
 hartrees
Energy at 0K-168.205148
Energy at 298.15K 
HF Energy-167.648153
Nuclear repulsion energy59.260059
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 MP4/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 3520 3438        
2 Σ 2269 2216        
3 Σ 1281 1251        
4 Π 534 521        
4 Π 534 521        
5 Π 456i 446i        
5 Π 457i 446i        

Unscaled Zero Point Vibrational Energy (zpe) 3611.5 cm-1
Scaled (by 0.9769) Zero Point Vibrational Energy (zpe) 3528.1 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/aug-cc-pVDZ
B
0.36763

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.205
N2 0.000 0.000 -0.015
C3 0.000 0.000 -1.208
H4 0.000 0.000 -2.282

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.21992.41263.4869
N21.21991.19272.2670
C32.41261.19271.0743
H43.48692.26701.0743

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 MP4/aug-cc-pVDZ
 hartrees
Energy at 0K-168.206912
Energy at 298.15K-168.207707
HF Energy-167.640594
Nuclear repulsion energy59.118417
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 MP4/6-31G*
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' 3440 3360        
2 A' 2233 2181        
3 A' 1269 1240        
4 A' 625 611        
5 A' 497 485        
6 A" 549 536        

Unscaled Zero Point Vibrational Energy (zpe) 4305.9 cm-1
Scaled (by 0.9769) Zero Point Vibrational Energy (zpe) 4206.4 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/aug-cc-pVDZ
ABC
55.70491 0.37103 0.36857

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.127 -0.408 0.000
N2 0.000 0.049 0.000
C3 1.182 0.306 0.000
H4 1.929 1.087 0.000

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.21662.41703.4024
N21.21661.20932.1903
C32.41701.20931.0810
H43.40242.19031.0810

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 170.169 N2 C3 H4 145.969
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability