return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-377.395029
Energy at 298.15K-377.399206
HF Energy-376.407598
Nuclear repulsion energy233.858530
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/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 Ag 3760 3597 0.00      
2 Ag 1931 1848 0.00      
3 Ag 1528 1462 0.00      
4 Ag 1277 1222 0.00      
5 Ag 857 820 0.00      
6 Ag 579 554 0.00      
7 Ag 420 401 0.00      
8 Au 686 656 195.57      
9 Au 478 458 57.77      
10 Au 132 126 5.11      
11 Bg 851 814 0.00      
12 Bg 683 653 0.00      
13 Bu 3765 3602 263.07      
14 Bu 1937 1853 440.16      
15 Bu 1400 1339 821.08      
16 Bu 1248 1194 18.46      
17 Bu 688 658 25.56      
18 Bu 270 258 50.51      

Unscaled Zero Point Vibrational Energy (zpe) 11244.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 10757.3 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/cc-pVDZ
ABC
0.19326 0.12754 0.07684

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVDZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.053 0.770 0.000
C2 0.053 -0.770 0.000
O3 1.125 1.381 0.000
O4 -1.125 -1.381 0.000
O5 -1.125 1.320 0.000
O6 1.125 -1.320 0.000
H7 1.792 0.671 0.000
H8 -1.792 -0.671 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.54361.32722.40321.20472.39921.84772.2579
C21.54362.40321.32722.39921.20472.25791.8477
O31.32722.40323.56242.25092.70090.97433.5661
O42.40321.32723.56242.70092.25093.56610.9743
O51.20472.39922.25092.70093.46882.98832.0993
O62.39921.20472.70092.25093.46882.09932.9883
H71.84772.25790.97433.56612.98832.09933.8265
H82.25791.84773.56610.97432.09932.98833.8265

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 113.455 C1 C2 O6 121.116
C1 O3 H7 105.783 C2 C1 O3 113.455
C2 C1 O5 121.116 C2 O4 H8 105.783
O3 C1 O5 125.429 O4 C2 O6 125.429
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability