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: BLYP/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 BLYP/cc-pVDZ
 hartrees
Energy at 0K-168.566354
Energy at 298.15K 
HF Energy-168.566354
Nuclear repulsion energy59.617240
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 BLYP/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 3445 3451 233.17 32.38 0.28 0.43
2 Σ 2258 2261 273.48 17.66 0.12 0.22
3 Σ 1259 1261 76.08 20.03 0.29 0.46
4 Π 540 541 1.32 0.53 0.75 0.86
4 Π 540 541 1.32 0.53 0.75 0.86
5 Π 289i 290i 82.45 1.77 0.75 0.86
5 Π 289i 290i 82.45 1.77 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3731.8 cm-1
Scaled (by 1.0016) Zero Point Vibrational Energy (zpe) 3737.8 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 BLYP/cc-pVDZ
B
0.37224

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.198
N2 0.000 0.000 -0.017
C3 0.000 0.000 -1.199
H4 0.000 0.000 -2.274

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.21442.39653.4715
N21.21441.18222.2571
C32.39651.18221.0750
H43.47152.25711.0750

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
Charges from optimized geometry at BLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.240      
2 N 0.207      
3 C -0.045      
4 H 0.078      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.605 2.605
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.494 0.000 0.000
y 0.000 -16.494 0.000
z 0.000 0.000 -13.858
Traceless
 xyz
x -1.318 0.000 0.000
y 0.000 -1.318 0.000
z 0.000 0.000 2.636
Polar
3z2-r25.272
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.420 0.000 0.000
y 0.000 1.420 0.000
z 0.000 0.000 5.679


<r2> (average value of r2) Å2
<r2> 35.024
(<r2>)1/2 5.918

Conformer 2 (CS)

Jump to S1C1
Energy calculated at BLYP/cc-pVDZ
 hartrees
Energy at 0K-168.567034
Energy at 298.15K-168.567732
HF Energy-168.567034
Nuclear repulsion energy59.568828
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 BLYP/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' 3361 3366 145.47      
2 A' 2208 2212 295.92      
3 A' 1266 1268 54.20      
4 A' 536 537 4.68      
5 A' 393 394 151.86      
6 A" 538 539 1.78      

Unscaled Zero Point Vibrational Energy (zpe) 4151.0 cm-1
Scaled (by 1.0016) Zero Point Vibrational Energy (zpe) 4157.6 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 BLYP/cc-pVDZ
ABC
71.45803 0.37567 0.37370

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.014 -0.628 0.000
N2 0.000 0.034 0.000
C3 1.073 0.555 0.000
H4 1.670 1.456 0.000

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.21082.39873.3982
N21.21081.19282.1937
C32.39871.19281.0814
H43.39822.19371.0814

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 172.725 N2 C3 H4 149.403
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.224      
2 N 0.218      
3 C -0.075      
4 H 0.081      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.543 1.688 0.000 2.287
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.251 1.325 0.000
y 1.325 -14.750 0.000
z 0.000 0.000 -16.537
Traceless
 xyz
x -0.608 1.325 0.000
y 1.325 1.645 0.000
z 0.000 0.000 -1.037
Polar
3z2-r2-2.074
x2-y2-1.502
xy1.325
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.716 1.813 0.000
y 1.813 2.563 0.000
z 0.000 0.000 1.425


<r2> (average value of r2) Å2
<r2> 34.948
(<r2>)1/2 5.912