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

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-228.157131
Energy at 298.15K-228.161845
HF Energy-227.737636
Nuclear repulsion energy117.414290
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/LANL2DZ
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' 3614 3481 40.82      
2 A' 3189 3072 10.69      
3 A' 3055 2942 4.96      
4 A' 1676 1614 194.22      
5 A' 1522 1466 28.81      
6 A' 1462 1408 31.46      
7 A' 1321 1272 50.36      
8 A' 1172 1129 153.85      
9 A' 1000 963 154.36      
10 A' 816 786 30.59      
11 A' 541 521 40.10      
12 A' 407 392 5.31      
13 A" 3157 3040 9.99      
14 A" 1520 1464 14.42      
15 A" 1109 1068 6.40      
16 A" 638 614 180.54      
17 A" 532 512 26.71      
18 A" 73 70 0.75      

Unscaled Zero Point Vibrational Energy (zpe) 13401.0 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 12906.5 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/LANL2DZ
ABC
0.34928 0.30182 0.16705

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.196 -0.782 0.000
C2 0.000 0.161 0.000
O3 0.011 1.417 0.000
H4 2.124 -0.193 0.000
H5 1.157 -1.428 0.892
H6 1.157 -1.428 -0.892
O7 -1.214 -0.574 0.000
H8 -1.994 0.035 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.52302.49751.09881.10181.10182.41893.2925
C21.52301.25572.15312.15852.15851.41921.9975
O32.49751.25572.65613.19383.19382.33762.4348
H41.09882.15312.65611.80401.80403.35944.1237
H51.10182.15853.19381.80401.78332.67323.5864
H61.10182.15853.19381.80401.78332.67323.5864
O72.41891.41922.33763.35942.67322.67320.9894
H83.29251.99752.43484.12373.58643.58640.9894

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 127.740 C1 C2 O7 110.547
C2 C1 H4 109.352 C2 C1 H5 109.593
C2 C1 H6 109.593 C2 O7 H8 110.796
O3 C2 O7 121.713 H4 C1 H5 110.120
H4 C1 H6 110.120 H5 C1 H6 108.044
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability