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 H2COO (Dioxymethyl radical)

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-37.788920
Energy at 298.15K-37.791139
HF Energy-37.788920
Nuclear repulsion energy36.906635
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 HF/CEP-31G
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' 3440 3101 19.45      
2 A' 3308 2982 23.88      
3 A' 1830 1649 132.40      
4 A' 1599 1442 46.89      
5 A' 1346 1213 13.97      
6 A' 501 451 95.16      
7 A' 357 322 1.76      
8 A" 1308 1179 13.70      
9 A" 539 486 0.95      

Unscaled Zero Point Vibrational Energy (zpe) 7113.5 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 6412.1 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 HF/CEP-31G
ABC
2.36404 0.35002 0.30488

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.524 0.000
C2 1.125 0.025 0.000
H3 1.243 -1.052 0.000
H4 1.989 0.676 0.000
O5 -1.248 -0.496 0.000

Atom - Atom Distances (Å)
  O1 C2 H3 H4 O5
O11.23042.00691.99511.6110
C21.23041.08351.08232.4287
H32.00691.08351.88272.5516
H41.99511.08231.88273.4423
O51.61102.42872.55163.4423

picture of Dioxymethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 H3 120.163 O1 C2 H4 119.090
C2 O1 O5 116.829 H3 C2 H4 120.747
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.124      
2 C 0.000      
3 H 0.206      
4 H 0.198      
5 O -0.280      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  5.629 -0.378 0.000 5.641
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.786 -0.208 0.000
y -0.208 -17.327 0.000
z 0.000 0.000 -17.243
Traceless
 xyz
x 2.500 -0.208 0.000
y -0.208 -1.313 0.000
z 0.000 0.000 -1.187
Polar
3z2-r2-2.373
x2-y22.542
xy-0.208
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.402 0.466 0.000
y 0.466 2.064 0.000
z 0.000 0.000 1.024


<r2> (average value of r2) Å2
<r2> 34.861
(<r2>)1/2 5.904