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: PBEPBEultrafine/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at PBEPBEultrafine/Def2TZVPP
 hartrees
Energy at 0K-168.476491
Energy at 298.15K 
HF Energy-168.476491
Nuclear repulsion energy60.214333
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 PBEPBEultrafine/Def2TZVPP
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 3441 3441 237.10 33.12 0.22 0.36
2 Σ 2277 2277 367.30 28.62 0.06 0.12
3 Σ 1282 1282 93.01 24.61 0.25 0.40
4 Π 549 549 2.85 0.28 0.75 0.86
4 Π 549 549 2.85 0.28 0.75 0.86
5 Π 180i 180i 80.91 5.11 0.75 0.86
5 Π 180i 180i 80.91 5.11 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3868.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3868.8 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 PBEPBEultrafine/Def2TZVPP
B
0.37977

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/Def2TZVPP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.186
N2 0.000 0.000 -0.016
C3 0.000 0.000 -1.186
H4 0.000 0.000 -2.253

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.20232.37223.4393
N21.20231.16992.2370
C32.37221.16991.0671
H43.43932.23701.0671

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 PBEPBEultrafine/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.267      
2 N 0.398      
3 C -0.364      
4 H 0.234      


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 -2.793 2.793
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.882 0.000 0.000
y 0.000 -16.882 0.000
z 0.000 0.000 -14.005
Traceless
 xyz
x -1.439 0.000 0.000
y 0.000 -1.439 0.000
z 0.000 0.000 2.877
Polar
3z2-r25.755
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 2.031 0.000 0.000
y 0.000 2.031 0.000
z 0.000 0.000 6.248


<r2> (average value of r2) Å2
<r2> 34.721
(<r2>)1/2 5.892