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

using model chemistry: CCD/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 CCD/6-31G*
 hartrees
Energy at 0K-228.435021
Energy at 298.15K-228.439922
HF Energy-227.808194
Nuclear repulsion energy120.905639
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*
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' 3742 3542 56.90      
2 A' 3221 3049 4.72      
3 A' 3104 2938 1.60      
4 A' 1922 1819 285.46      
5 A' 1528 1447 12.35      
6 A' 1476 1397 80.02      
7 A' 1403 1328 22.39      
8 A' 1268 1201 225.52      
9 A' 1041 986 52.06      
10 A' 896 848 2.42      
11 A' 597 565 48.21      
12 A' 429 406 4.50      
13 A" 3179 3009 4.12      
14 A" 1527 1445 9.11      
15 A" 1106 1047 8.58      
16 A" 687 650 123.59      
17 A" 556 527 24.41      
18 A" 98 93 0.40      

Unscaled Zero Point Vibrational Energy (zpe) 13890.3 cm-1
Scaled (by 0.9465) Zero Point Vibrational Energy (zpe) 13147.2 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*
ABC
0.37676 0.31543 0.17738

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.000 -0.979 0.000
C2 0.000 0.145 0.000
O3 0.282 1.327 0.000
H4 1.989 -0.525 0.000
H5 0.872 -1.612 0.885
H6 0.872 -1.612 -0.885
O7 -1.273 -0.297 0.000
H8 -1.805 0.518 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50392.41471.08851.09611.09612.37323.1793
C21.50391.21542.09912.15222.15221.34761.8432
O32.41471.21542.51883.12583.12582.24852.2382
H41.08852.09912.51881.79241.79243.27063.9351
H51.09612.15223.12581.79241.77102.66813.5344
H61.09612.15223.12581.79241.77102.66813.5344
O72.37321.34762.24853.27062.66812.66810.9733
H83.17931.84322.23823.93513.53443.53440.9733

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 124.905 C1 C2 O7 112.543
C2 C1 H4 107.040 C2 C1 H5 110.762
C2 C1 H6 110.762 C2 O7 H8 103.983
O3 C2 O7 122.552 H4 C1 H5 110.263
H4 C1 H6 110.263 H5 C1 H6 107.772
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability