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

using model chemistry: HF/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at HF/6-31+G**
 hartrees
Energy at 0K-376.394325
Energy at 298.15K-376.398638
HF Energy-376.394325
Nuclear repulsion energy236.663709
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 HF/6-31+G**
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 4070 3680 0.00      
2 Ag 2062 1865 0.00      
3 Ag 1604 1451 0.00      
4 Ag 1337 1209 0.00      
5 Ag 917 829 0.00      
6 Ag 610 551 0.00      
7 Ag 454 410 0.00      
8 Au 681 616 274.37      
9 Au 525 474 101.28      
10 Au 117 106 8.82      
11 Bg 904 818 0.00      
12 Bg 673 609 0.00      
13 Bu 4073 3682 377.57      
14 Bu 2051 1854 783.08      
15 Bu 1452 1313 998.55      
16 Bu 1314 1188 5.55      
17 Bu 739 668 31.84      
18 Bu 296 268 52.61      

Unscaled Zero Point Vibrational Energy (zpe) 11938.4 cm-1
Scaled (by 0.9042) Zero Point Vibrational Energy (zpe) 10794.7 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 HF/6-31+G**
ABC
0.19996 0.12908 0.07844

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.048 0.768 0.000
C2 0.048 -0.768 0.000
O3 1.104 1.377 0.000
O4 -1.104 -1.377 0.000
O5 -1.104 1.302 0.000
O6 1.104 -1.302 0.000
H7 1.818 0.747 0.000
H8 -1.818 -0.747 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.53861.30342.39041.18372.36941.86612.3297
C21.53862.39041.30342.36941.18372.32971.8661
O31.30342.39043.52972.20992.67910.95133.6125
O42.39041.30343.52972.67912.20993.61250.9513
O51.18372.36942.20992.67913.41512.97442.1704
O62.36941.18372.67912.20993.41512.17042.9744
H71.86612.32970.95133.61252.97442.17043.9309
H82.32971.86613.61250.95132.17042.97443.9309

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 114.256 C1 C2 O6 120.438
C1 O3 H7 110.743 C2 C1 O3 114.256
C2 C1 O5 120.438 C2 O4 H8 110.743
O3 C1 O5 125.306 O4 C2 O6 125.306
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.672      
2 C 0.672      
3 O -0.540      
4 O -0.540      
5 O -0.542      
6 O -0.542      
7 H 0.410      
8 H 0.410      


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 -30.620 4.449 0.000
y 4.449 -44.249 0.000
z 0.000 0.000 -31.780
Traceless
 xyz
x 7.394 4.449 0.000
y 4.449 -13.049 0.000
z 0.000 0.000 5.655
Polar
3z2-r211.309
x2-y213.629
xy4.449
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.274 -0.530 0.000
y -0.530 4.761 0.000
z 0.000 0.000 3.012


<r2> (average value of r2) Å2
<r2> 133.520
(<r2>)1/2 11.555