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: B97D3/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at B97D3/TZVP
 hartrees
Energy at 0K-378.263402
Energy at 298.15K-378.267320
HF Energy-378.263402
Nuclear repulsion energy232.434995
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 B97D3/TZVP
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 3538 3487 0.00      
2 Ag 1771 1746 0.00      
3 Ag 1374 1355 0.00      
4 Ag 1169 1152 0.00      
5 Ag 784 773 0.00      
6 Ag 543 536 0.00      
7 Ag 381 375 0.00      
8 Au 690 680 193.26      
9 Au 437 430 55.80      
10 Au 114 112 6.51      
11 Bg 792 781 0.00      
12 Bg 683 673 0.00      
13 Bu 3540 3489 217.86      
14 Bu 1799 1773 426.90      
15 Bu 1288 1270 742.85      
16 Bu 1155 1138 33.15      
17 Bu 654 644 21.26      
18 Bu 236 233 58.05      

Unscaled Zero Point Vibrational Energy (zpe) 10473.7 cm-1
Scaled (by 0.9856) Zero Point Vibrational Energy (zpe) 10322.9 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 B97D3/TZVP
ABC
0.19163 0.12548 0.07583

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/TZVP

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.056 0.776 0.000
C2 0.056 -0.776 0.000
O3 1.129 1.389 0.000
O4 -1.129 -1.389 0.000
O5 -1.129 1.335 0.000
O6 1.129 -1.335 0.000
H7 1.810 0.683 0.000
H8 -1.810 -0.683 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 O6 H7 H8
C11.55641.33412.41621.20952.42091.86822.2813
C21.55642.41621.33412.42091.20952.28131.8682
O31.33412.41623.57962.25852.72360.98063.5956
O42.41621.33413.57962.72362.25853.59560.9806
O51.20952.42092.25852.72363.49643.01012.1296
O62.42091.20952.72362.25853.49642.12963.0101
H71.86822.28130.98063.59563.01012.12963.8687
H82.28131.86823.59560.98062.12963.01013.8687

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 113.204 C1 C2 O6 121.641
C1 O3 H7 106.629 C2 C1 O3 113.204
C2 C1 O5 121.641 C2 O4 H8 106.629
O3 C1 O5 125.156 O4 C2 O6 125.156
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.186      
2 C 0.186      
3 O -0.194      
4 O -0.194      
5 O -0.288      
6 O -0.288      
7 H 0.297      
8 H 0.297      


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 -30.607 3.801 0.000
y 3.801 -42.833 0.000
z 0.000 0.000 -31.779
Traceless
 xyz
x 6.699 3.801 0.000
y 3.801 -11.640 0.000
z 0.000 0.000 4.941
Polar
3z2-r29.882
x2-y212.226
xy3.801
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.205 -0.264 0.000
y -0.264 5.619 0.000
z 0.000 0.000 3.098


<r2> (average value of r2) Å2
<r2> 136.808
(<r2>)1/2 11.697