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

using model chemistry: MP2/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-45.034251
Energy at 298.15K-45.038979
HF Energy-44.607287
Nuclear repulsion energy65.657886
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/CEP-121G
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' 3579 3493 35.31      
2 A' 3143 3068 9.95      
3 A' 3007 2934 5.54      
4 A' 1659 1619 187.79      
5 A' 1512 1476 26.82      
6 A' 1457 1422 26.31      
7 A' 1312 1281 59.93      
8 A' 1168 1140 143.80      
9 A' 998 974 152.20      
10 A' 808 789 33.17      
11 A' 537 524 38.11      
12 A' 403 394 5.56      
13 A" 3112 3037 10.27      
14 A" 1500 1464 12.83      
15 A" 1095 1069 2.97      
16 A" 621 606 170.77      
17 A" 524 511 19.30      
18 A" 76 75 0.91      

Unscaled Zero Point Vibrational Energy (zpe) 13255.5 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 12937.4 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/CEP-121G
ABC
0.34649 0.29994 0.16583

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.195 -0.794 0.000
C2 0.000 0.158 0.000
O3 0.026 1.420 0.000
H4 2.119 -0.203 0.000
H5 1.155 -1.438 0.891
H6 1.155 -1.438 -0.891
O7 -1.227 -0.566 0.000
H8 -1.992 0.061 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.52802.50331.09671.10001.10002.43303.2995
C21.52801.26182.15002.16212.16211.42531.9942
O32.50331.26182.64883.19903.19902.34872.4330
H41.09672.15002.64881.80221.80223.36624.1196
H51.10002.16213.19901.80221.78142.68823.5972
H61.10002.16213.19901.80221.78142.68823.5972
O72.43301.42532.34873.36622.68822.68820.9889
H83.29951.99422.43304.11963.59723.59720.9889

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 127.352 C1 C2 O7 110.893
C2 C1 H4 108.888 C2 C1 H5 109.644
C2 C1 H6 109.644 C2 O7 H8 110.072
O3 C2 O7 121.755 H4 C1 H5 110.257
H4 C1 H6 110.257 H5 C1 H6 108.140
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability