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/6-31G

19 10 17 12 22

States and conformations

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

Conformer 1 (C*V)

Jump to S1C2
Energy calculated at B2PLYP/6-31G
 hartrees
Energy at 0K-168.310804
Energy at 298.15K 
HF Energy-168.180068
Nuclear repulsion energy58.879497
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/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Σ 3563 3563 230.64 36.37 0.22 0.37
2 Σ 2194 2194 234.63 14.28 0.12 0.22
3 Σ 1168 1168 68.75 20.63 0.32 0.48
4 Π 485 485 6.16 0.11 0.75 0.86
4 Π 485 485 6.16 0.11 0.75 0.86
5 Π 49 49 103.73 4.04 0.75 0.86
5 Π 49 49 103.73 4.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3995.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3995.8 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 B2PLYP/6-31G
B
0.36310

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.218
N2 0.000 0.000 -0.029
C3 0.000 0.000 -1.211
H4 0.000 0.000 -2.271

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.24742.42923.4895
N21.24741.18172.2421
C32.42921.18171.0603
H43.48952.24211.0603

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 B2PLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.362      
2 N 0.054      
3 C 0.015      
4 H 0.292      


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 -3.489 3.489
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.741 0.000 0.000
y 0.000 -16.741 0.000
z 0.000 0.000 -14.387
Traceless
 xyz
x -1.177 0.000 0.000
y 0.000 -1.177 0.000
z 0.000 0.000 2.355
Polar
3z2-r24.710
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 1.085 0.000 0.000
y 0.000 1.085 0.000
z 0.000 0.000 5.815


<r2> (average value of r2) Å2
<r2> 35.797
(<r2>)1/2 5.983

Conformer 2 (CS)

Jump to S1C1
Energy calculated at B2PLYP/6-31G
 hartrees
Energy at 0K-168.310805
Energy at 298.15K-168.310920
HF Energy-168.180077
Nuclear repulsion energy58.879099
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/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3562 3562 230.68      
2 A' 2194 2194 234.47      
3 A' 1168 1168 68.85      
4 A' 485 485 6.18      
5 A' 51 51 103.69      
6 A" 482 482 1.91      

Unscaled Zero Point Vibrational Energy (zpe) 3971.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3971.1 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/6-31G
B
0.36310

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -0.003 -1.218 0.000
N2 0.000 0.029 0.000
C3 0.003 1.211 0.000
H4 0.004 2.271 0.000

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.24752.42923.4895
N21.24751.18162.2420
C32.42921.18161.0603
H43.48952.24201.0603

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 179.982 N2 C3 H4 179.920
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.362      
2 N 0.054      
3 C 0.015      
4 H 0.292      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.006 3.489 0.000 3.489
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.739 0.001 0.000
y 0.001 -14.370 0.000
z 0.000 0.000 -16.739
Traceless
 xyz
x -1.185 0.001 0.000
y 0.001 2.369 0.000
z 0.000 0.000 -1.185
Polar
3z2-r2-2.369
x2-y2-2.369
xy0.001
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.084 0.011 0.000
y 0.011 5.811 0.000
z 0.000 0.000 1.084


<r2> (average value of r2) Å2
<r2> 35.797
(<r2>)1/2 5.983