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: QCISD/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-302.292765
Energy at 298.15K-302.295925
HF Energy-301.483449
Nuclear repulsion energy162.588011
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 QCISD/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3787 3565 93.71      
2 A' 3123 2940 36.65      
3 A' 1904 1793 143.60      
4 A' 1805 1700 106.89      
5 A' 1429 1345 338.98      
6 A' 1384 1303 21.88      
7 A' 1258 1185 12.23      
8 A' 907 854 50.34      
9 A' 690 650 17.18      
10 A' 512 482 5.79      
11 A' 296 278 33.54      
12 A" 1000 942 3.05      
13 A" 679 639 89.74      
14 A" 566 533 45.67      
15 A" 172 162 25.77      

Unscaled Zero Point Vibrational Energy (zpe) 9755.1 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 9183.5 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 QCISD/6-31G**
ABC
0.36418 0.15266 0.10757

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.755 -0.750 0.000
C2 0.000 0.582 0.000
O3 -0.148 -1.806 0.000
O4 -0.579 1.642 0.000
O5 1.334 0.439 0.000
H6 -1.849 -0.673 0.000
H7 1.521 -0.515 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.53061.21872.39852.40331.09662.2879
C21.53062.39271.20851.34162.23411.8749
O31.21872.39273.47562.68992.04432.1100
O42.39851.20853.47562.26042.64023.0105
O52.40331.34162.68992.26043.37120.9715
H61.09662.23412.04432.64023.37123.3733
H72.28791.87492.11003.01050.97153.3733

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 121.804 C1 C2 O5 113.433
C2 C1 O3 120.559 C2 C1 H6 115.521
C2 O5 H7 107.208 O3 C1 H6 123.920
O4 C2 O5 124.764
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability