return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for H2COO (Dioxymethyl radical)

using model chemistry: PBEPBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-189.403927
Energy at 298.15K-189.406460
HF Energy-189.403927
Nuclear repulsion energy69.364954
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 PBEPBE/6-31+G**
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' 3238 3201 0.41      
2 A' 3078 3042 3.33      
3 A' 1461 1444 30.70      
4 A' 1339 1324 25.22      
5 A' 1200 1187 20.41      
6 A' 967 956 74.14      
7 A' 523 517 0.28      
8 A" 824 815 45.30      
9 A" 646 638 10.87      

Unscaled Zero Point Vibrational Energy (zpe) 6638.0 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 6562.3 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 PBEPBE/6-31+G**
ABC
2.64472 0.40544 0.35155

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.462 0.000
C2 1.083 -0.227 0.000
H3 1.021 -1.320 0.000
H4 1.997 0.369 0.000
O5 -1.189 -0.172 0.000

Atom - Atom Distances (Å)
  O1 C2 H3 H4 O5
O11.28332.05351.99921.3478
C21.28331.09461.09152.2730
H32.05351.09461.95092.4908
H41.99921.09151.95093.2322
O51.34782.27302.49083.2322

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 119.225 O1 C2 H4 114.426
C2 O1 O5 119.491 H3 C2 H4 126.348
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O 0.100      
2 C -0.126      
3 H 0.196      
4 H 0.186      
5 O -0.356      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  3.955 -0.400 0.000 3.975
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -16.949 -0.417 0.000
y -0.417 -16.869 0.000
z 0.000 0.000 -17.781
Traceless
 xyz
x 0.376 -0.417 0.000
y -0.417 0.497 0.000
z 0.000 0.000 -0.873
Polar
3z2-r2-1.745
x2-y2-0.081
xy-0.417
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.588 -0.089 0.000
y -0.089 2.943 0.000
z 0.000 0.000 2.065


<r2> (average value of r2) Å2
<r2> 38.258
(<r2>)1/2 6.185