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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-76.265724
Energy at 298.15K-76.269523
HF Energy-76.265724
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 3685 3685 0.00      
2 Ag 1747 1747 0.00      
3 Ag 1345 1345 0.00      
4 Ag 1172 1172 0.00      
5 Ag 792 792 0.00      
6 Ag 539 539 0.00      
7 Ag 384 384 0.00      
8 Au 633 633 356.59      
9 Au 438 438 86.46      
10 Au 115 115 7.49      
11 Bg 776 776 0.00      
12 Bg 618 618 0.00      
13 Bu 3685 3685 211.33      
14 Bu 1763 1763 391.88      
15 Bu 1205 1205 849.82      
16 Bu 1171 1171 69.43      
17 Bu 631 631 24.20      
18 Bu 229 229 65.62      

Unscaled Zero Point Vibrational Energy (zpe) 10463.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 10463.7 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
0.18385 0.12122 0.07305

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 -0.051 0.784 0.000
C2 0.051 -0.784 0.000
O3 1.151 1.416 0.000
O4 -1.151 -1.416 0.000
O5 -1.151 1.353 0.000
O6 1.151 -1.353 0.000
H7 1.906 0.783 0.000
H8 -1.906 -0.783 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.57091.35822.45941.23782.45131.95772.4284
C21.57092.45941.35822.45131.23782.42841.9577
O31.35822.45943.64952.30232.76870.98573.7662
O42.45941.35823.64952.76872.30233.76620.9857
O51.23782.45132.30232.76873.55163.10962.2657
O62.45131.23782.76872.30233.55162.26573.1096
H71.95772.42840.98573.76623.10962.26574.1221
H82.42841.95773.76620.98572.26573.10964.1221

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 114.004 C1 C2 O6 121.102
C1 O3 H7 112.307 C2 C1 O3 114.004
C2 C1 O5 121.102 C2 O4 H8 112.307
O3 C1 O5 124.894 O4 C2 O6 124.894
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 -0.045      
2 C -0.045      
3 O -0.278      
4 O -0.278      
5 O -0.095      
6 O -0.095      
7 H 0.418      
8 H 0.418      


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 -30.181 4.551 0.000
y 4.551 -46.967 0.000
z 0.000 0.000 -32.084
Traceless
 xyz
x 9.344 4.551 0.000
y 4.551 -15.835 0.000
z 0.000 0.000 6.490
Polar
3z2-r212.980
x2-y216.786
xy4.551
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.907 -0.528 0.000
y -0.528 4.663 0.000
z 0.000 0.000 2.412


<r2> (average value of r2) Å2
<r2> 113.971
(<r2>)1/2 10.676