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All results from a given calculation for C2H2O2 (Ethanedial)

using model chemistry: BLYP/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at BLYP/Def2TZVPP
 hartrees
Energy at 0K-227.880061
Energy at 298.15K 
HF Energy-227.880061
Nuclear repulsion energy101.069098
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 BLYP/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 2837 2837 0.00 304.13 0.25 0.40
2 Ag 1706 1706 0.00 57.64 0.54 0.70
3 Ag 1342 1342 0.00 13.16 0.40 0.57
4 Ag 1010 1010 0.00 13.01 0.73 0.85
5 Ag 525 525 0.00 5.00 0.30 0.47
6 Au 782 782 1.46 0.00 0.00 0.00
7 Au 117 117 28.75 0.00 0.00 0.00
8 Bg 1036 1036 0.00 7.28 0.75 0.86
9 Bu 2831 2831 169.27 0.00 0.00 0.00
10 Bu 1713 1713 174.69 0.00 0.00 0.00
11 Bu 1300 1300 5.21 0.00 0.00 0.00
12 Bu 329 329 46.34 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 7764.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7764.1 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 BLYP/Def2TZVPP
ABC
1.84888 0.15663 0.14440

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/Def2TZVPP

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.329 0.694 0.000
C2 0.329 -0.694 0.000
H3 -1.444 0.680 0.000
H4 1.444 -0.680 0.000
O5 0.329 1.714 0.000
O6 -0.329 -1.714 0.000

Atom - Atom Distances (Å)
  C1 C2 H3 H4 O5 O6
C11.53631.11442.24291.21412.4080
C21.53632.24291.11442.40801.2141
H31.11442.24293.19142.05242.6406
H42.24291.11443.19142.64062.0524
O51.21412.40802.05242.64063.4907
O62.40801.21412.64062.05243.4907

picture of Ethanedial state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 114.654 C1 C2 O6 121.775
C2 C1 H3 114.654 C2 C1 O5 121.775
H3 C1 O5 123.571 H4 C2 O6 123.571
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.106      
2 C 0.106      
3 H 0.087      
4 H 0.087      
5 O -0.193      
6 O -0.193      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.657 -3.180 0.000
y -3.180 -30.645 0.000
z 0.000 0.000 -21.478
Traceless
 xyz
x 4.404 -3.180 0.000
y -3.180 -9.077 0.000
z 0.000 0.000 4.673
Polar
3z2-r29.347
x2-y28.988
xy-3.180
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.928 0.517 0.000
y 0.517 5.977 0.000
z 0.000 0.000 2.716


<r2> (average value of r2) Å2
<r2> 76.273
(<r2>)1/2 8.733