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

using model chemistry: B1B95/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B1B95/6-31G*
 hartrees
Energy at 0K-378.203900
Energy at 298.15K-378.208044
HF Energy-378.203900
Nuclear repulsion energy234.981170
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 B1B95/6-31G*
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 3625 3441 0.00      
2 Ag 1905 1808 0.00      
3 Ag 1511 1434 0.00      
4 Ag 1258 1194 0.00      
5 Ag 851 808 0.00      
6 Ag 573 544 0.00      
7 Ag 417 396 0.00      
8 Au 734 697 216.67      
9 Au 457 434 58.54      
10 Au 135 128 5.92      
11 Bg 802 761 0.00      
12 Bg 721 685 0.00      
13 Bu 3629 3445 262.23      
14 Bu 1926 1828 427.99      
15 Bu 1387 1317 875.32      
16 Bu 1253 1190 7.01      
17 Bu 675 641 23.38      
18 Bu 278 264 54.20      

Unscaled Zero Point Vibrational Energy (zpe) 11068.1 cm-1
Scaled (by 0.9493) Zero Point Vibrational Energy (zpe) 10507.0 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 B1B95/6-31G*
ABC
0.19336 0.13022 0.07781

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.051 0.765 0.000
C2 0.051 -0.765 0.000
O3 1.124 1.359 0.000
O4 -1.124 -1.359 0.000
O5 -1.124 1.314 0.000
O6 1.124 -1.314 0.000
H7 1.792 0.644 0.000
H8 -1.792 -0.644 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.53431.31692.38011.20512.38891.84782.2401
C21.53432.38011.31692.38891.20512.24011.8478
O31.31692.38013.52762.24882.67330.97883.5382
O42.38011.31693.52762.67332.24883.53820.9788
O51.20512.38892.24882.67333.45892.99272.0691
O62.38891.20512.67332.24883.45892.06912.9927
H71.84782.24010.97883.53822.99272.06913.8092
H82.24011.84783.53820.97882.06912.99273.8092

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 112.961 C1 C2 O6 120.925
C1 O3 H7 106.262 C2 C1 O3 112.961
C2 C1 O5 120.925 C2 O4 H8 106.262
O3 C1 O5 126.113 O4 C2 O6 126.113
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.558      
2 C 0.558      
3 O -0.559      
4 O -0.559      
5 O -0.458      
6 O -0.458      
7 H 0.459      
8 H 0.459      


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 -29.726 3.458 0.000
y 3.458 -41.605 0.000
z 0.000 0.000 -31.085
Traceless
 xyz
x 6.619 3.458 0.000
y 3.458 -11.199 0.000
z 0.000 0.000 4.580
Polar
3z2-r29.161
x2-y211.879
xy3.458
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.197 -0.285 0.000
y -0.285 4.534 0.000
z 0.000 0.000 2.325


<r2> (average value of r2) Å2
<r2> 133.271
(<r2>)1/2 11.544