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: CCSD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-189.188507
Energy at 298.15K-189.191111
HF Energy-188.570066
Nuclear repulsion energy70.395817
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 CCSD/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 A' 3344 3161 0.56      
2 A' 3189 3015 5.76      
3 A' 1565 1480 36.18      
4 A' 1415 1338 19.07      
5 A' 1265 1196 17.07      
6 A' 926 875 117.74      
7 A' 541 511 0.12      
8 A" 956 904 29.71      
9 A" 684 647 2.52      

Unscaled Zero Point Vibrational Energy (zpe) 6942.7 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 6564.4 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 CCSD/6-31G(2df,p)
ABC
2.64216 0.42223 0.36405

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.466 0.000
C2 1.059 -0.206 0.000
H3 0.990 -1.287 0.000
H4 1.977 0.366 0.000
O5 -1.165 -0.196 0.000

Atom - Atom Distances (Å)
  O1 C2 H3 H4 O5
O11.25462.01321.97911.3404
C21.25461.08321.08102.2245
H32.01321.08321.92522.4151
H41.97911.08101.92523.1916
O51.34042.22452.41513.1916

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 118.716 O1 C2 H4 115.650
C2 O1 O5 117.973 H3 C2 H4 125.634
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability