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

using model chemistry: PBE1PBE/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at PBE1PBE/6-311G**
 hartrees
Energy at 0K-378.039044
Energy at 298.15K-378.043219
HF Energy-378.039044
Nuclear repulsion energy235.332430
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 PBE1PBE/6-311G**
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 3683 3533 0.00      
2 Ag 1887 1810 0.00      
3 Ag 1485 1425 0.00      
4 Ag 1243 1193 0.00      
5 Ag 850 815 0.00      
6 Ag 576 553 0.00      
7 Ag 411 394 0.00      
8 Au 724 695 204.34      
9 Au 467 448 54.17      
10 Au 134 128 5.91      
11 Bg 838 804 0.00      
12 Bg 720 691 0.00      
13 Bu 3688 3538 282.20      
14 Bu 1905 1828 485.01      
15 Bu 1368 1312 839.83      
16 Bu 1235 1185 8.42      
17 Bu 684 656 23.94      
18 Bu 266 255 59.36      

Unscaled Zero Point Vibrational Energy (zpe) 11080.4 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 10630.6 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 PBE1PBE/6-311G**
ABC
0.19463 0.12997 0.07793

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.052 0.767 0.000
C2 0.052 -0.767 0.000
O3 1.121 1.362 0.000
O4 -1.121 -1.362 0.000
O5 -1.121 1.313 0.000
O6 1.121 -1.313 0.000
H7 1.786 0.651 0.000
H8 -1.786 -0.651 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.53681.31552.38191.20002.38761.84192.2398
C21.53682.38191.31552.38761.20002.23981.8419
O31.31552.38193.52792.24182.67520.97353.5360
O42.38191.31553.52792.67522.24183.53600.9735
O51.20002.38762.24182.67523.45252.98102.0741
O62.38761.20002.67522.24183.45252.07412.9810
H71.84192.23980.97353.53602.98102.07413.8022
H82.23981.84193.53600.97352.07412.98103.8022

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 113.019 C1 C2 O6 120.988
C1 O3 H7 106.190 C2 C1 O3 113.019
C2 C1 O5 120.988 C2 O4 H8 106.190
O3 C1 O5 125.993 O4 C2 O6 125.993
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.324      
2 C 0.324      
3 O -0.263      
4 O -0.263      
5 O -0.334      
6 O -0.334      
7 H 0.274      
8 H 0.274      


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 -30.314 3.622 0.000
y 3.622 -42.024 0.000
z 0.000 0.000 -31.325
Traceless
 xyz
x 6.360 3.622 0.000
y 3.622 -11.204 0.000
z 0.000 0.000 4.844
Polar
3z2-r29.689
x2-y211.710
xy3.622
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.311 -0.295 0.000
y -0.295 4.688 0.000
z 0.000 0.000 2.546


<r2> (average value of r2) Å2
<r2> 133.357
(<r2>)1/2 11.548