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

using model chemistry: MP2=FULL/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=FULL/6-31G**
 hartrees
Energy at 0K-228.469334
Energy at 298.15K-228.474214
HF Energy-227.818940
Nuclear repulsion energy120.856706
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=FULL/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' 3819 3568 59.99      
2 A' 3289 3074 3.82      
3 A' 3157 2950 1.42      
4 A' 1862 1740 232.43      
5 A' 1535 1434 12.08      
6 A' 1466 1370 67.19      
7 A' 1382 1292 43.80      
8 A' 1232 1151 193.76      
9 A' 1032 964 65.64      
10 A' 888 830 3.10      
11 A' 584 546 44.21      
12 A' 427 399 3.96      
13 A" 3250 3037 3.22      
14 A" 1539 1438 7.93      
15 A" 1098 1026 6.44      
16 A" 691 645 118.56      
17 A" 555 519 18.62      
18 A" 90 84 0.51      

Unscaled Zero Point Vibrational Energy (zpe) 13948.2 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 13033.2 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 MP2=FULL/6-31G**
ABC
0.37381 0.31700 0.17713

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.069 -0.898 0.000
C2 0.000 0.155 0.000
O3 0.174 1.359 0.000
H4 2.042 -0.422 0.000
H5 0.959 -1.529 0.878
H6 0.959 -1.529 -0.878
O7 -1.238 -0.408 0.000
H8 -1.860 0.336 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50002.42761.08301.08681.08682.35783.1782
C21.50001.21652.12172.12762.12761.35981.8691
O32.42761.21652.58103.11913.11912.26172.2767
H41.08302.12172.58101.77981.77983.27953.9750
H51.08682.12763.11911.77981.75552.61793.4928
H61.08682.12763.11911.77981.75552.61793.4928
O72.35781.35982.26173.27952.61792.61790.9704
H83.17821.86912.27673.97503.49283.49280.9704

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 126.351 C1 C2 O7 110.971
C2 C1 H4 109.396 C2 C1 H5 109.632
C2 C1 H6 109.632 C2 O7 H8 105.439
O3 C2 O7 122.677 H4 C1 H5 110.217
H4 C1 H6 110.217 H5 C1 H6 107.725
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability