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All results from a given calculation for CH3COOH (Acetic acid)

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-228.453589
Energy at 298.15K-228.458461
HF Energy-227.818685
Nuclear repulsion energy120.734615
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 MP2/6-31G**
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' 3816 3574 59.72      
2 A' 3285 3077 3.96      
3 A' 3154 2954 1.49      
4 A' 1858 1740 231.31      
5 A' 1533 1436 11.99      
6 A' 1463 1370 66.13      
7 A' 1380 1293 43.58      
8 A' 1231 1153 193.63      
9 A' 1031 965 66.22      
10 A' 886 830 3.14      
11 A' 583 546 44.10      
12 A' 425 398 3.97      
13 A" 3246 3039 3.36      
14 A" 1537 1439 7.79      
15 A" 1096 1027 6.24      
16 A" 688 645 119.17      
17 A" 552 517 17.95      
18 A" 90 84 0.49      

Unscaled Zero Point Vibrational Energy (zpe) 13927.5 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 13043.1 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 MP2/6-31G**
ABC
0.37313 0.31626 0.17676

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.070 -0.899 0.000
C2 0.000 0.155 0.000
O3 0.173 1.360 0.000
H4 2.044 -0.422 0.000
H5 0.961 -1.531 0.879
H6 0.961 -1.531 -0.879
O7 -1.239 -0.409 0.000
H8 -1.861 0.336 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50172.43021.08411.08801.08802.36063.1811
C21.50171.21762.12372.13002.13001.36141.8702
O32.43021.21762.58353.12233.12232.26382.2777
H41.08412.12372.58351.78171.78173.28303.9782
H51.08802.13003.12231.78171.75752.62113.4962
H61.08802.13003.12231.78171.75752.62113.4962
O72.36061.36142.26383.28302.62112.62110.9710
H83.18111.87022.27773.97823.49623.49620.9710

picture of Acetic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 126.363 C1 C2 O7 110.979
C2 C1 H4 109.364 C2 C1 H5 109.631
C2 C1 H6 109.631 C2 O7 H8 105.384
O3 C2 O7 122.658 H4 C1 H5 110.225
H4 C1 H6 110.225 H5 C1 H6 107.744
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability