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

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-228.613010
Energy at 298.15K-228.617891
HF Energy-227.837362
Nuclear repulsion energy121.335749
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 QCISD/6-31G(2df,p)
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' 3835 3633 60.51      
2 A' 3224 3055 3.87      
3 A' 3107 2944 1.33      
4 A' 1883 1784 274.05      
5 A' 1502 1423 11.87      
6 A' 1449 1373 69.06      
7 A' 1381 1308 15.52      
8 A' 1246 1181 204.14      
9 A' 1022 968 49.60      
10 A' 883 837 2.14      
11 A' 591 560 44.06      
12 A' 420 398 3.58      
13 A" 3184 3016 3.06      
14 A" 1506 1427 6.95      
15 A" 1088 1030 7.97      
16 A" 683 647 96.09      
17 A" 556 526 22.91      
18 A" 93 88 0.27      

Unscaled Zero Point Vibrational Energy (zpe) 13825.6 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 13098.4 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 QCISD/6-31G(2df,p)
ABC
0.37928 0.31710 0.17842

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.975 -0.999 0.000
C2 0.000 0.145 0.000
O3 0.314 1.314 0.000
H4 1.972 -0.571 0.000
H5 0.833 -1.628 0.883
H6 0.833 -1.628 -0.883
O7 -1.278 -0.265 0.000
H8 -1.775 0.558 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50352.40621.08521.09261.09262.36903.1605
C21.50351.21022.09822.14842.14841.34191.8225
O32.40621.21022.51103.11493.11492.24202.2213
H41.08522.09822.51101.78691.78693.26403.9137
H51.09262.14843.11491.78691.76512.66243.5154
H61.09262.14843.11491.78691.76512.66243.5154
O72.36901.34192.24203.26402.66242.66240.9622
H83.16051.82252.22133.91373.51543.51540.9622

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 124.561 C1 C2 O7 112.601
C2 C1 H4 107.180 C2 C1 H5 110.697
C2 C1 H6 110.697 C2 O7 H8 103.318
O3 C2 O7 122.837 H4 C1 H5 110.268
H4 C1 H6 110.268 H5 C1 H6 107.749
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability