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All results from a given calculation for CHOCOOH (oxo acetic acid)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-59.966263
Energy at 298.15K-59.969339
HF Energy-59.214066
Nuclear repulsion energy86.177713
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 MP2/CEP-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 A' 3657 3472 103.35      
2 A' 3112 2955 41.54      
3 A' 1824 1732 162.83      
4 A' 1724 1637 81.54      
5 A' 1403 1332 354.72      
6 A' 1337 1269 22.58      
7 A' 1221 1159 7.69      
8 A' 888 843 55.98      
9 A' 672 638 14.15      
10 A' 494 469 5.59      
11 A' 281 266 32.52      
12 A" 984 934 4.39      
13 A" 671 637 97.85      
14 A" 555 527 41.66      
15 A" 171 163 28.28      

Unscaled Zero Point Vibrational Energy (zpe) 9495.9 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 9015.4 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 MP2/CEP-31G*
ABC
0.35551 0.14776 0.10438

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.761 -0.765 0.000
C2 0.000 0.589 0.000
O3 -0.145 -1.838 0.000
O4 -0.593 1.664 0.000
O5 1.349 0.456 0.000
H6 -1.868 -0.690 0.000
H7 1.537 -0.513 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.55301.23812.43462.43791.10932.3113
C21.55302.43171.22771.35602.26381.8909
O31.23812.43173.53102.73772.07082.1406
O42.43461.22773.53102.28742.67733.0453
O52.43791.35602.73772.28743.41520.9867
H61.10932.26382.07082.67733.41523.4089
H72.31131.89092.14063.04530.98673.4089

picture of oxo acetic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O4 121.788 C1 C2 O5 113.701
C2 C1 O3 120.794 C2 C1 H6 115.486
C2 O5 H7 106.570 O3 C1 H6 123.720
O4 C2 O5 124.511
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability