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: mPW1PW91/daug-cc-pVDZ

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 mPW1PW91/daug-cc-pVDZ
 hartrees
Energy at 0K-168.553832
Energy at 298.15K 
HF Energy-168.553832
Nuclear repulsion energy60.513512
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 mPW1PW91/daug-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 3530 3530 269.71 30.53 0.22 0.35
2 Σ 2363 2363 430.84 53.42 0.06 0.12
3 Σ 1328 1328 138.53 24.16 0.18 0.30
4 Π 562 562 3.77 0.18 0.75 0.86
4 Π 562 562 3.77 0.18 0.75 0.86
5 Π 184 184 71.07 4.49 0.75 0.86
5 Π 184 184 71.07 4.49 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4356.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 4356.7 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 mPW1PW91/daug-cc-pVDZ
B
0.38366

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/daug-cc-pVDZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.181
N2 0.000 0.000 -0.018
C3 0.000 0.000 -1.179
H4 0.000 0.000 -2.244

Atom - Atom Distances (Å)
  O1 N2 C3 H4
O11.19852.35963.4249
N21.19851.16112.2264
C32.35961.16111.0653
H43.42492.22641.0653

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 mPW1PW91/daug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -1.263      
2 N 2.380      
3 C -0.256      
4 H -0.860      


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 -3.241 3.241
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.888 0.000 0.000
y 0.000 -16.888 0.000
z 0.000 0.000 -13.926
Traceless
 xyz
x -1.481 0.000 0.000
y 0.000 -1.481 0.000
z 0.000 0.000 2.962
Polar
3z2-r25.924
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 2.547 0.000 0.000
y 0.000 2.547 0.000
z 0.000 0.000 6.388


<r2> (average value of r2) Å2
<r2> 34.461
(<r2>)1/2 5.870