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

using model chemistry: TPSSh/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at TPSSh/aug-cc-pVTZ
 hartrees
Energy at 0K-378.485483
Energy at 298.15K-378.489568
HF Energy-378.485483
Nuclear repulsion energy233.948122
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 TPSSh/aug-cc-pVTZ
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 3573 3449 0.00      
2 Ag 1806 1743 0.00      
3 Ag 1428 1379 0.00      
4 Ag 1212 1170 0.00      
5 Ag 817 789 0.00      
6 Ag 559 539 0.00      
7 Ag 393 379 0.00      
8 Au 734 709 170.74      
9 Au 455 439 45.84      
10 Au 129 124 6.16      
11 Bg 829 800 0.00      
12 Bg 731 706 0.00      
13 Bu 3576 3452 237.22      
14 Bu 1835 1772 461.60      
15 Bu 1328 1282 778.82      
16 Bu 1195 1154 17.86      
17 Bu 661 638 21.55      
18 Bu 247 238 55.35      

Unscaled Zero Point Vibrational Energy (zpe) 10754.8 cm-1
Scaled (by 0.9652) Zero Point Vibrational Energy (zpe) 10380.5 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 TPSSh/aug-cc-pVTZ
ABC
0.19270 0.12829 0.07702

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/aug-cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.055 0.767 0.000
C2 0.055 -0.767 0.000
O3 1.126 1.372 0.000
O4 -1.126 -1.372 0.000
O5 -1.126 1.322 0.000
O6 1.126 -1.322 0.000
H7 1.799 0.660 0.000
H8 -1.799 -0.660 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.53891.32652.39271.20642.40031.85662.2538
C21.53892.39271.32652.40031.20642.25381.8566
O31.32652.39273.54982.25252.69440.97943.5615
O42.39271.32653.54982.69442.25253.56150.9794
O51.20642.40032.25252.69443.47362.99882.0936
O62.40031.20642.69442.25253.47362.09362.9988
H71.85662.25380.97943.56152.99882.09363.8322
H82.25381.85663.56150.97942.09362.99883.8322

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 113.028 C1 C2 O6 121.468
C1 O3 H7 106.275 C2 C1 O3 113.028
C2 C1 O5 121.468 C2 O4 H8 106.275
O3 C1 O5 125.504 O4 C2 O6 125.504
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.656      
2 C 0.656      
3 O -0.306      
4 O -0.306      
5 O -0.578      
6 O -0.578      
7 H 0.229      
8 H 0.229      


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


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.540 -0.234 0.000
y -0.234 6.346 0.000
z 0.000 0.000 3.884


<r2> (average value of r2) Å2
<r2> 134.895
(<r2>)1/2 11.614