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=FULLultrafine/6-31G(2df,p)

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 B2PLYP=FULLultrafine/6-31G(2df,p)
 hartrees
Energy at 0K-168.470047
Energy at 298.15K 
HF Energy-168.268885
Nuclear repulsion energy60.407796
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=FULLultrafine/6-31G(2df,p)
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 3545 3545 256.07 28.20 0.25 0.39
2 Σ 2324 2324 323.18 11.17 0.14 0.25
3 Σ 1302 1302 77.93 25.86 0.25 0.40
4 Π 578 578 1.35 0.52 0.75 0.86
4 Π 578 578 1.35 0.52 0.75 0.86
5 Π 81 81 71.84 1.53 0.75 0.86
5 Π 81 81 71.84 1.53 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4244.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4244.8 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=FULLultrafine/6-31G(2df,p)
B
0.38220

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31G(2df,p)

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.183
N2 0.000 0.000 -0.018
C3 0.000 0.000 -1.183
H4 0.000 0.000 -2.240

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.20072.36543.4230
N21.20071.16472.2223
C32.36541.16471.0576
H43.42302.22231.0576

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=FULLultrafine/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.425      
2 N 0.442      
3 C -0.279      
4 H 0.262      


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 -2.967 2.967
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.490 0.000 0.000
y 0.000 -16.490 0.000
z 0.000 0.000 -13.426
Traceless
 xyz
x -1.532 0.000 0.000
y 0.000 -1.532 0.000
z 0.000 0.000 3.065
Polar
3z2-r26.129
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 1.711 0.000 0.000
y 0.000 1.711 0.000
z 0.000 0.000 5.542


<r2> (average value of r2) Å2
<r2> 34.261
(<r2>)1/2 5.853