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

using model chemistry: MP2/SDD

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/SDD
 hartrees
Energy at 0K-228.161254
Energy at 298.15K-228.165969
HF Energy-227.738124
Nuclear repulsion energy117.416663
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/SDD
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' 3612 3487 40.95      
2 A' 3188 3078 10.37      
3 A' 3054 2948 4.84      
4 A' 1676 1618 195.52      
5 A' 1522 1470 28.95      
6 A' 1462 1411 31.47      
7 A' 1320 1274 50.03      
8 A' 1172 1132 153.91      
9 A' 999 965 154.90      
10 A' 815 787 30.76      
11 A' 541 522 39.91      
12 A' 407 393 5.32      
13 A" 3156 3046 9.64      
14 A" 1520 1467 14.53      
15 A" 1109 1071 6.34      
16 A" 637 615 180.50      
17 A" 532 513 26.25      
18 A" 73 71 0.75      

Unscaled Zero Point Vibrational Energy (zpe) 13397.3 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 12932.5 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/SDD
ABC
0.34925 0.30187 0.16706

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.196 -0.781 0.000
C2 0.000 0.161 0.000
O3 0.010 1.417 0.000
H4 2.124 -0.192 0.000
H5 1.158 -1.427 0.892
H6 1.158 -1.427 -0.892
O7 -1.214 -0.575 0.000
H8 -1.993 0.034 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.52302.49741.09871.10171.10172.41873.2922
C21.52301.25552.15292.15832.15831.41941.9973
O32.49741.25552.65583.19363.19362.33782.4343
H41.09872.15292.65581.80391.80393.35924.1232
H51.10172.15833.19361.80391.78312.67283.5860
H61.10172.15833.19361.80391.78312.67283.5860
O72.41871.41942.33783.35922.67282.67280.9896
H83.29221.99732.43434.12323.58603.58600.9896

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 127.748 C1 C2 O7 110.530
C2 C1 H4 109.340 C2 C1 H5 109.589
C2 C1 H6 109.589 C2 O7 H8 110.746
O3 C2 O7 121.722 H4 C1 H5 110.129
H4 C1 H6 110.129 H5 C1 H6 108.046
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability