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 CHOCOOH (oxo acetic acid)

using model chemistry: MP2=FULL/STO-3G

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=FULL/STO-3G
 hartrees
Energy at 0K-297.724631
Energy at 298.15K-297.727431
HF Energy-297.428068
Nuclear repulsion energy157.498540
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=FULL/STO-3G
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' 3733 3319 8.56      
2 A' 3352 2980 13.08      
3 A' 1847 1642 22.91      
4 A' 1676 1490 13.24      
5 A' 1566 1392 152.03      
6 A' 1400 1244 23.06      
7 A' 1247 1108 29.58      
8 A' 872 775 11.17      
9 A' 675 600 11.10      
10 A' 477 424 2.62      
11 A' 242 215 18.03      
12 A" 923 820 5.85      
13 A" 755 671 58.23      
14 A" 536 476 9.81      
15 A" 196 174 5.92      

Unscaled Zero Point Vibrational Energy (zpe) 9747.5 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 8664.5 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=FULL/STO-3G
ABC
0.35499 0.14242 0.10164

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.849 -0.728 0.000
C2 0.000 0.613 0.000
O3 -0.206 -1.824 0.000
O4 -0.447 1.789 0.000
O5 1.372 0.294 0.000
H6 -1.967 -0.652 0.000
H7 1.313 -0.728 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.58741.27062.54862.44531.12002.1620
C21.58742.44581.25781.40852.33831.8768
O31.27062.44583.62072.64172.11501.8730
O42.54861.25783.62072.35422.87483.0712
O52.44531.40852.64172.35423.47011.0243
H61.12002.33832.11502.87483.47013.2803
H72.16201.87681.87303.07121.02433.2803

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 126.826 C1 C2 O5 109.270
C2 C1 O3 117.254 C2 C1 H6 118.437
C2 O5 H7 99.761 O3 C1 H6 124.309
O4 C2 O5 123.904
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability