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: CCSD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at CCSD/aug-cc-pVTZ
 hartrees
Energy at 0K-377.788599
Energy at 298.15K 
HF Energy-376.529344
Nuclear repulsion energy234.645534
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 CCSD/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at CCSD/aug-cc-pVTZ
ABC
0.19497 0.12819 0.07734

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/aug-cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.053 0.767 0.000
C2 0.053 -0.767 0.000
O3 1.119 1.377 0.000
O4 -1.119 -1.377 0.000
O5 -1.119 1.316 0.000
O6 1.119 -1.316 0.000
H7 1.802 0.688 0.000
H8 -1.802 -0.688 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.53791.32142.39511.19972.39061.85602.2748
C21.53792.39511.32142.39061.19972.27481.8560
O31.32142.39513.54962.23952.69380.97013.5771
O42.39511.32143.54962.69382.23953.57710.9701
O51.19972.39062.23952.69383.45592.98782.1170
O62.39061.19972.69382.23953.45592.11702.9878
H71.85602.27480.97013.57712.98782.11703.8567
H82.27481.85603.57710.97012.11702.98783.8567

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 113.570 C1 C2 O6 121.180
C1 O3 H7 107.184 C2 C1 O3 113.570
C2 C1 O5 121.180 C2 O4 H8 107.184
O3 C1 O5 125.250 O4 C2 O6 125.250
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability