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

using model chemistry: BLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at BLYP/6-31G*
 hartrees
Energy at 0K-378.262088
Energy at 298.15K-378.266027
HF Energy-378.262088
Nuclear repulsion energy230.946491
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 BLYP/6-31G*
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 3384 3356 0.00      
2 Ag 1757 1742 0.00      
3 Ag 1408 1397 0.00      
4 Ag 1180 1170 0.00      
5 Ag 784 777 0.00      
6 Ag 544 540 0.00      
7 Ag 388 385 0.00      
8 Au 721 716 182.21      
9 Au 428 424 47.41      
10 Au 130 129 5.10      
11 Bg 759 753 0.00      
12 Bg 698 692 0.00      
13 Bu 3386 3359 178.58      
14 Bu 1791 1777 300.87      
15 Bu 1321 1310 762.72      
16 Bu 1164 1155 37.78      
17 Bu 638 633 19.43      
18 Bu 257 254 53.26      

Unscaled Zero Point Vibrational Energy (zpe) 10368.8 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 10284.8 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 BLYP/6-31G*
ABC
0.18741 0.12535 0.07511

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.056 0.781 0.000
C2 0.056 -0.781 0.000
O3 1.134 1.389 0.000
O4 -1.134 -1.389 0.000
O5 -1.134 1.350 0.000
O6 1.134 -1.350 0.000
H7 1.823 0.686 0.000
H8 -1.823 -0.686 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.56691.33582.42351.21902.44131.88142.2970
C21.56692.42351.33582.44131.21902.29701.8814
O31.33582.42353.58612.26812.73940.98503.6122
O42.42351.33583.58612.73942.26813.61220.9850
O51.21902.44132.26812.73943.52653.03092.1494
O62.44131.21902.73942.26813.52652.14943.0309
H71.88142.29700.98503.61223.03092.14943.8957
H82.29701.88143.61220.98502.14943.03093.8957

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 112.974 C1 C2 O6 121.901
C1 O3 H7 107.363 C2 C1 O3 112.974
C2 C1 O5 121.901 C2 O4 H8 107.363
O3 C1 O5 125.125 O4 C2 O6 125.125
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.515      
2 C 0.515      
3 O -0.506      
4 O -0.506      
5 O -0.427      
6 O -0.427      
7 H 0.417      
8 H 0.417      


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 -29.977 3.377 0.000
y 3.377 -41.400 0.000
z 0.000 0.000 -31.284
Traceless
 xyz
x 6.365 3.377 0.000
y 3.377 -10.770 0.000
z 0.000 0.000 4.404
Polar
3z2-r28.809
x2-y211.423
xy3.377
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.649 -0.185 0.000
y -0.185 4.998 0.000
z 0.000 0.000 2.358


<r2> (average value of r2) Å2
<r2> 137.301
(<r2>)1/2 11.718