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

using model chemistry: BLYP/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-378.301655
Energy at 298.15K-378.305657
HF Energy-378.301655
Nuclear repulsion energy231.802736
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(2df,p)
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 3454 3435 0.00      
2 Ag 1758 1749 0.00      
3 Ag 1393 1385 0.00      
4 Ag 1182 1175 0.00      
5 Ag 786 782 0.00      
6 Ag 547 544 0.00      
7 Ag 390 387 0.00      
8 Au 726 722 150.98      
9 Au 438 435 39.97      
10 Au 130 130 4.93      
11 Bg 793 788 0.00      
12 Bg 719 715 0.00      
13 Bu 3458 3439 193.27      
14 Bu 1792 1782 309.96      
15 Bu 1311 1304 711.64      
16 Bu 1160 1154 40.90      
17 Bu 642 638 17.94      
18 Bu 255 253 53.18      

Unscaled Zero Point Vibrational Energy (zpe) 10466.3 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 10408.7 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 BLYP/6-31G(2df,p)
ABC
0.18899 0.12603 0.07561

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-31G(2df,p)

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.057 0.774 0.000
C2 0.057 -0.774 0.000
O3 1.137 1.383 0.000
O4 -1.137 -1.383 0.000
O5 -1.137 1.336 0.000
O6 1.137 -1.336 0.000
H7 1.803 0.652 0.000
H8 -1.803 -0.652 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.55231.34112.41251.21762.42501.86402.2536
C21.55232.41251.34112.42501.21762.25361.8640
O31.34112.41253.58152.27542.71940.98863.5756
O42.41251.34113.58152.71942.27543.57560.9886
O51.21762.42502.27542.71943.50953.01862.0964
O62.42501.21762.71942.27543.50952.09643.0186
H71.86402.25360.98863.57563.01862.09643.8337
H82.25361.86403.57560.98862.09643.01863.8337

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 112.770 C1 C2 O6 121.740
C1 O3 H7 105.278 C2 C1 O3 112.770
C2 C1 O5 121.740 C2 O4 H8 105.278
O3 C1 O5 125.491 O4 C2 O6 125.491
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.289      
2 C 0.289      
3 O -0.297      
4 O -0.297      
5 O -0.299      
6 O -0.299      
7 H 0.307      
8 H 0.307      


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 -30.152 3.447 0.000
y 3.447 -40.476 0.000
z 0.000 0.000 -31.080
Traceless
 xyz
x 5.627 3.447 0.000
y 3.447 -9.860 0.000
z 0.000 0.000 4.233
Polar
3z2-r28.467
x2-y210.325
xy3.447
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.762 -0.159 0.000
y -0.159 5.419 0.000
z 0.000 0.000 2.924


<r2> (average value of r2) Å2
<r2> 136.330
(<r2>)1/2 11.676