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

using model chemistry: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-302.303791
Energy at 298.15K-302.306903
HF Energy-301.471175
Nuclear repulsion energy161.704351
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 MP4/6-31G*
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' 3596 3434        
2 A' 3051 2913        
3 A' 1827 1744        
4 A' 1717 1640        
5 A' 1413 1349        
6 A' 1354 1293        
7 A' 1233 1178        
8 A' 886 846        
9 A' 674 644        
10 A' 496 474        
11 A' 293 280        
12 A" 974 930        
13 A" 697 665        
14 A" 550 525        
15 A" 175 167        

Unscaled Zero Point Vibrational Energy (zpe) 9468.8 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 9040.8 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 MP4/6-31G*
ABC
0.36182 0.15099 0.10653

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.758 -0.748 0.000
C2 0.000 0.585 0.000
O3 -0.150 -1.815 0.000
O4 -0.577 1.658 0.000
O5 1.339 0.431 0.000
H6 -1.860 -0.671 0.000
H7 1.512 -0.539 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 H6 H7
C11.53311.22902.41222.40531.10512.2791
C21.53312.40511.21841.34802.24451.8835
O31.22902.40513.49952.69462.05852.0951
O42.41221.21843.49952.27582.65853.0313
O52.40531.34802.69462.27583.38370.9845
H61.10512.24452.05852.65853.38373.3745
H72.27911.88352.09513.03130.98453.3745

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 122.078 C1 C2 O5 113.052
C2 C1 O3 120.699 C2 C1 H6 115.636
C2 O5 H7 106.667 O3 C1 H6 123.665
O4 C2 O5 124.870
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability