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All results from a given calculation for C2H2O4 (Oxalic Acid)

using model chemistry: wB97X-D/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at wB97X-D/CEP-31G*
 hartrees
Energy at 0K-76.420152
Energy at 298.15K-76.424193
HF Energy-76.420152
Nuclear repulsion energy 
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 wB97X-D/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 Ag 3736 3736 0.00      
2 Ag 1883 1883 0.00      
3 Ag 1482 1482 0.00      
4 Ag 1240 1240 0.00      
5 Ag 834 834 0.00      
6 Ag 556 556 0.00      
7 Ag 414 414 0.00      
8 Au 677 677 229.79      
9 Au 457 457 65.61      
10 Au 122 122 6.78      
11 Bg 817 817 0.00      
12 Bg 669 669 0.00      
13 Bu 3739 3739 247.40      
14 Bu 1891 1891 546.75      
15 Bu 1361 1361 924.14      
16 Bu 1222 1222 12.40      
17 Bu 666 666 25.11      
18 Bu 276 276 52.71      

Unscaled Zero Point Vibrational Energy (zpe) 11019.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 11019.6 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 wB97X-D/CEP-31G*
ABC
0.19036 0.12494 0.07543

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/CEP-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.052 0.783 0.000
C2 0.052 -0.783 0.000
O3 1.133 1.389 0.000
O4 -1.133 -1.389 0.000
O5 -1.133 1.338 0.000
O6 1.133 -1.338 0.000
H7 1.814 0.686 0.000
H8 -1.814 -0.686 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.56961.33092.42611.21492.42981.86912.2943
C21.56962.42611.33092.42981.21492.29431.8691
O31.33092.42613.58472.26622.72730.97913.6044
O42.42611.33093.58472.72732.26623.60440.9791
O51.21492.42982.26622.72733.50673.01852.1360
O62.42981.21492.72732.26623.50672.13603.0185
H71.86912.29430.97913.60443.01852.13603.8796
H82.29431.86913.60440.97912.13603.01853.8796

picture of Oxalic Acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O4 113.273 C1 C2 O6 121.004
C1 O3 H7 107.033 C2 C1 O3 113.273
C2 C1 O5 121.004 C2 O4 H8 107.033
O3 C1 O5 125.723 O4 C2 O6 125.723
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.051      
2 C -0.051      
3 O -0.271      
4 O -0.271      
5 O -0.119      
6 O -0.119      
7 H 0.441      
8 H 0.441      


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 -29.868 3.945 0.000
y 3.945 -43.176 0.000
z 0.000 0.000 -31.566
Traceless
 xyz
x 7.503 3.945 0.000
y 3.945 -12.458 0.000
z 0.000 0.000 4.956
Polar
3z2-r29.912
x2-y213.307
xy3.945
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.473 -0.375 0.000
y -0.375 4.943 0.000
z 0.000 0.000 2.769


<r2> (average value of r2) Å2
<r2> 109.673
(<r2>)1/2 10.473