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

using model chemistry: LSDA/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at LSDA/6-31G**
 hartrees
Energy at 0K-376.444854
Energy at 298.15K-376.449018
HF Energy-376.444854
Nuclear repulsion energy235.849316
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 LSDA/6-31G**
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 3335 3273 0.00      
2 Ag 1839 1805 0.00      
3 Ag 1484 1456 0.00      
4 Ag 1215 1192 0.00      
5 Ag 848 832 0.00      
6 Ag 576 565 0.00      
7 Ag 388 381 0.00      
8 Au 818 803 188.03      
9 Au 435 427 36.66      
10 Au 157 154 4.05      
11 Bg 821 806 0.00      
12 Bg 763 748 0.00      
13 Bu 3348 3285 339.67      
14 Bu 1883 1847 344.93      
15 Bu 1360 1335 755.62      
16 Bu 1241 1218 55.22      
17 Bu 656 643 19.25      
18 Bu 261 256 73.66      

Unscaled Zero Point Vibrational Energy (zpe) 10712.8 cm-1
Scaled (by 0.9813) Zero Point Vibrational Energy (zpe) 10512.5 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 LSDA/6-31G**
ABC
0.19027 0.13490 0.07894

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.048 0.759 0.000
C2 0.048 -0.759 0.000
O3 1.135 1.325 0.000
O4 -1.135 -1.325 0.000
O5 -1.135 1.303 0.000
O6 1.135 -1.303 0.000
H7 1.760 0.541 0.000
H8 -1.760 -0.541 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.52031.31112.34981.21582.37701.82042.1495
C21.52032.34981.31112.37701.21582.14951.8204
O31.31112.34983.48852.26982.62791.00183.4438
O42.34981.31113.48852.62792.26983.44381.0018
O51.21582.37702.26982.62793.45622.99301.9476
O62.37701.21582.62792.26983.45621.94762.9930
H71.82042.14951.00183.44382.99301.94763.6820
H82.14951.82043.44381.00181.94762.99303.6820

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 111.970 C1 C2 O6 120.216
C1 O3 H7 103.006 C2 C1 O3 111.970
C2 C1 O5 120.216 C2 O4 H8 103.006
O3 C1 O5 127.814 O4 C2 O6 127.814
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.468      
2 C 0.468      
3 O -0.419      
4 O -0.419      
5 O -0.411      
6 O -0.411      
7 H 0.362      
8 H 0.362      


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 -30.336 3.063 0.000
y 3.063 -40.928 0.000
z 0.000 0.000 -31.265
Traceless
 xyz
x 5.761 3.063 0.000
y 3.063 -10.128 0.000
z 0.000 0.000 4.367
Polar
3z2-r28.734
x2-y210.593
xy3.063
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.441 -0.157 0.000
y -0.157 4.789 0.000
z 0.000 0.000 2.362


<r2> (average value of r2) Å2
<r2> 131.519
(<r2>)1/2 11.468