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: CCD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/6-31G(2df,p)
 hartrees
Energy at 0K-302.461119
Energy at 298.15K-302.464353
HF Energy-301.513037
Nuclear repulsion energy163.888288
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 CCD/6-31G(2df,p)
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' 3803 3602 106.77      
2 A' 3093 2930 27.84      
3 A' 1948 1845 173.55      
4 A' 1860 1762 94.67      
5 A' 1449 1373 342.37      
6 A' 1384 1311 17.05      
7 A' 1275 1208 8.79      
8 A' 919 871 46.42      
9 A' 703 666 17.03      
10 A' 519 491 5.56      
11 A' 296 280 33.27      
12 A" 1043 987 3.21      
13 A" 688 652 69.04      
14 A" 601 569 43.71      
15 A" 181 172 24.98      

Unscaled Zero Point Vibrational Energy (zpe) 9880.9 cm-1
Scaled (by 0.9472) Zero Point Vibrational Energy (zpe) 9359.2 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 CCD/6-31G(2df,p)
ABC
0.37037 0.15459 0.10907

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.744 -0.754 0.000
C2 0.000 0.582 0.000
O3 -0.142 -1.795 0.000
O4 -0.581 1.625 0.000
O5 1.322 0.447 0.000
H6 -1.840 -0.677 0.000
H7 1.508 -0.502 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.52921.20242.38432.38971.09902.2657
C21.52922.38141.19351.32912.22921.8569
O31.20242.38143.44782.67782.03332.0965
O42.38431.19353.44782.23802.62302.9806
O52.38971.32912.67782.23803.35580.9666
H61.09902.22922.03332.62303.35583.3524
H72.26571.85692.09652.98060.96663.3524

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 121.770 C1 C2 O5 113.266
C2 C1 O3 120.873 C2 C1 H6 115.050
C2 O5 H7 106.908 O3 C1 H6 124.077
O4 C2 O5 124.964
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability