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

using model chemistry: BLYP/3-21G*

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/3-21G*
 hartrees
Energy at 0K-376.160605
Energy at 298.15K-376.164633
HF Energy-376.160605
Nuclear repulsion energy228.947779
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/3-21G*
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 3106 3086 0.00      
2 Ag 1674 1663 0.00      
3 Ag 1347 1338 0.00      
4 Ag 1130 1122 0.00      
5 Ag 737 732 0.00      
6 Ag 553 550 0.00      
7 Ag 381 378 0.00      
8 Au 751 746 227.92      
9 Au 454 451 30.97      
10 Au 169 167 2.48      
11 Bg 796 791 0.00      
12 Bg 746 741 0.00      
13 Bu 3108 3088 125.58      
14 Bu 1742 1731 150.89      
15 Bu 1273 1264 695.39      
16 Bu 1125 1117 71.62      
17 Bu 624 620 18.19      
18 Bu 247 246 66.90      

Unscaled Zero Point Vibrational Energy (zpe) 9980.6 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 9915.7 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/3-21G*
ABC
0.18014 0.12668 0.07438

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.060 0.770 0.000
C2 0.060 -0.770 0.000
O3 1.165 1.377 0.000
O4 -1.165 -1.377 0.000
O5 -1.165 1.338 0.000
O6 1.165 -1.338 0.000
H7 1.841 0.607 0.000
H8 -1.841 -0.607 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.54511.36702.41531.24242.43781.90772.2513
C21.54512.41531.36702.43781.24242.25131.9077
O31.36702.41533.60792.33042.71491.02513.6016
O42.41531.36703.60792.71492.33043.60161.0251
O51.24242.43782.33042.71493.54773.09352.0584
O62.43781.24242.71492.33043.54772.05843.0935
H71.90772.25131.02513.60163.09352.05843.8766
H82.25131.90773.60161.02512.05843.09353.8766

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 111.933 C1 C2 O6 121.607
C1 O3 H7 104.883 C2 C1 O3 111.933
C2 C1 O5 121.607 C2 O4 H8 104.883
O3 C1 O5 126.460 O4 C2 O6 126.460
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.556      
2 C 0.556      
3 O -0.489      
4 O -0.489      
5 O -0.430      
6 O -0.430      
7 H 0.363      
8 H 0.363      


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 -30.258 2.666 0.000
y 2.666 -42.296 0.000
z 0.000 0.000 -31.251
Traceless
 xyz
x 6.515 2.666 0.000
y 2.666 -11.541 0.000
z 0.000 0.000 5.026
Polar
3z2-r210.053
x2-y212.038
xy2.666
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.371 -0.188 0.000
y -0.188 4.350 0.000
z 0.000 0.000 1.578


<r2> (average value of r2) Å2
<r2> 138.700
(<r2>)1/2 11.777