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

using model chemistry: B1B95/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B1B95/6-311G*
 hartrees
Energy at 0K-378.305427
Energy at 298.15K-378.309608
HF Energy-378.305427
Nuclear repulsion energy235.476864
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 B1B95/6-311G*
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 3681 3529 0.00      
2 Ag 1891 1813 0.00      
3 Ag 1491 1429 0.00      
4 Ag 1240 1189 0.00      
5 Ag 849 814 0.00      
6 Ag 573 550 0.00      
7 Ag 419 401 0.00      
8 Au 729 699 240.02      
9 Au 467 447 62.22      
10 Au 133 127 6.13      
11 Bg 836 801 0.00      
12 Bg 720 691 0.00      
13 Bu 3684 3531 215.01      
14 Bu 1908 1829 485.39      
15 Bu 1373 1316 899.38      
16 Bu 1231 1180 8.80      
17 Bu 683 654 25.20      
18 Bu 279 267 55.21      

Unscaled Zero Point Vibrational Energy (zpe) 11093.0 cm-1
Scaled (by 0.9586) Zero Point Vibrational Energy (zpe) 10633.7 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 B1B95/6-311G*
ABC
0.19496 0.13008 0.07802

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.053 0.766 0.000
C2 0.053 -0.766 0.000
O3 1.119 1.361 0.000
O4 -1.119 -1.361 0.000
O5 -1.119 1.312 0.000
O6 1.119 -1.312 0.000
H7 1.798 0.667 0.000
H8 -1.798 -0.667 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.53611.31452.37981.19782.38601.85392.2586
C21.53612.37981.31452.38601.19782.25861.8539
O31.31452.37983.52462.23872.67350.97113.5534
O42.37981.31453.52462.67352.23873.55340.9711
O51.19782.38602.23872.67353.44902.98782.0927
O62.38601.19782.67352.23873.44902.09272.9878
H71.85392.25860.97113.55342.98782.09273.8363
H82.25861.85393.55340.97112.09272.98783.8363

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 112.973 C1 C2 O6 121.064
C1 O3 H7 107.457 C2 C1 O3 112.973
C2 C1 O5 121.064 C2 O4 H8 107.457
O3 C1 O5 125.963 O4 C2 O6 125.963
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.359      
2 C 0.359      
3 O -0.465      
4 O -0.465      
5 O -0.330      
6 O -0.330      
7 H 0.436      
8 H 0.436      


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 -29.844 3.531 0.000
y 3.531 -42.535 0.000
z 0.000 0.000 -31.350
Traceless
 xyz
x 7.098 3.531 0.000
y 3.531 -11.938 0.000
z 0.000 0.000 4.839
Polar
3z2-r29.679
x2-y212.691
xy3.531
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.262 -0.307 0.000
y -0.307 4.602 0.000
z 0.000 0.000 2.472


<r2> (average value of r2) Å2
<r2> 133.308
(<r2>)1/2 11.546