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

using model chemistry: CCD/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 CCD/6-31G*
 hartrees
Energy at 0K-377.324445
Energy at 298.15K-377.328565
HF Energy-376.364826
Nuclear repulsion energy233.500576
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 CCD/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 3681 3484 0.00      
2 Ag 1930 1827 0.00      
3 Ag 1527 1445 0.00      
4 Ag 1282 1213 0.00      
5 Ag 856 810 0.00      
6 Ag 579 548 0.00      
7 Ag 429 406 0.00      
8 Au 691 654 241.54      
9 Au 464 439 71.67      
10 Au 123 117 5.55      
11 Bg 793 751 0.00      
12 Bg 675 639 0.00      
13 Bu 3684 3487 251.38      
14 Bu 1938 1834 402.37      
15 Bu 1395 1321 892.82      
16 Bu 1255 1188 17.41      
17 Bu 681 644 25.45      
18 Bu 286 271 49.33      

Unscaled Zero Point Vibrational Energy (zpe) 11134.0 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 10538.3 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 CCD/6-31G*
ABC
0.19259 0.12748 0.07671

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

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.051 0.768 0.000
C2 0.051 -0.768 0.000
O3 1.126 1.382 0.000
O4 -1.126 -1.382 0.000
O5 -1.126 1.320 0.000
O6 1.126 -1.320 0.000
H7 1.819 0.689 0.000
H8 -1.819 -0.689 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.53871.32822.40331.20812.39651.87212.2907
C21.53872.40331.32822.39651.20812.29071.8721
O31.32822.40333.56542.25302.70160.97983.6006
O42.40331.32823.56542.70162.25303.60060.9798
O51.20812.39652.25302.70163.46953.01182.1251
O62.39651.20812.70162.25303.46952.12513.0118
H71.87212.29070.97983.60063.01182.12513.8905
H82.29071.87213.60060.97982.12513.01183.8905

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 113.719 C1 C2 O6 121.020
C1 O3 H7 107.457 C2 C1 O3 113.719
C2 C1 O5 121.020 C2 O4 H8 107.457
O3 C1 O5 125.261 O4 C2 O6 125.261
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability