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

using model chemistry: MP3/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP3/6-31G*
 hartrees
Energy at 0K-228.429643
Energy at 298.15K-228.434553
HF Energy-227.808623
Nuclear repulsion energy121.073592
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 MP3/6-31G*
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' 3771 3539 61.18      
2 A' 3246 3047 4.00      
3 A' 3128 2936 1.12      
4 A' 1934 1816 297.41      
5 A' 1535 1441 13.03      
6 A' 1481 1390 84.66      
7 A' 1409 1322 22.18      
8 A' 1276 1198 227.04      
9 A' 1045 981 50.98      
10 A' 902 846 2.17      
11 A' 600 563 49.55      
12 A' 430 404 4.70      
13 A" 3203 3006 3.36      
14 A" 1533 1439 9.55      
15 A" 1109 1041 8.96      
16 A" 689 647 124.22      
17 A" 558 524 24.92      
18 A" 99 93 0.41      

Unscaled Zero Point Vibrational Energy (zpe) 13973.6 cm-1
Scaled (by 0.9386) Zero Point Vibrational Energy (zpe) 13115.6 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 MP3/6-31G*
ABC
0.37835 0.31579 0.17783

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.063 -0.908 0.000
C2 0.000 0.154 0.000
O3 0.185 1.347 0.000
H4 2.044 -0.435 0.000
H5 0.948 -1.543 0.883
H6 0.948 -1.543 -0.883
O7 -1.242 -0.387 0.000
H8 -1.864 0.363 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50302.42021.08901.09321.09322.36323.1910
C21.50301.20712.12712.13522.13521.35471.8756
O32.42021.20712.57513.11673.11672.24572.2734
H41.08902.12712.57511.79061.79063.28613.9884
H51.09322.13523.11671.79061.76532.62933.5100
H61.09322.13523.11671.79061.76532.62933.5100
O72.36321.35472.24573.28612.62932.62930.9740
H83.19101.87562.27343.98843.51003.51000.9740

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 126.165 C1 C2 O7 111.471
C2 C1 H4 109.258 C2 C1 H5 109.651
C2 C1 H6 109.651 C2 O7 H8 106.154
O3 C2 O7 122.363 H4 C1 H5 110.284
H4 C1 H6 110.284 H5 C1 H6 107.694
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability