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

using model chemistry: QCISD/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 QCISD/6-31G*
 hartrees
Energy at 0K-228.443918
Energy at 298.15K-228.448791
HF Energy-227.807405
Nuclear repulsion energy120.639822
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*
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' 3710 3533 52.75      
2 A' 3208 3055 5.67      
3 A' 3093 2946 2.10      
4 A' 1878 1788 270.67      
5 A' 1526 1453 12.57      
6 A' 1468 1398 67.91      
7 A' 1395 1328 24.55      
8 A' 1256 1196 213.55      
9 A' 1035 986 55.65      
10 A' 886 844 2.25      
11 A' 589 561 46.99      
12 A' 425 405 4.32      
13 A" 3167 3016 5.10      
14 A" 1524 1452 8.76      
15 A" 1100 1048 8.12      
16 A" 687 654 124.08      
17 A" 552 526 20.93      
18 A" 93 88 0.39      

Unscaled Zero Point Vibrational Energy (zpe) 13796.1 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 13138.0 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*
ABC
0.37459 0.31451 0.17662

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.000 -0.981 0.000
C2 0.000 0.145 0.000
O3 0.285 1.331 0.000
H4 1.991 -0.528 0.000
H5 0.873 -1.615 0.886
H6 0.873 -1.615 -0.886
O7 -1.276 -0.299 0.000
H8 -1.806 0.519 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50572.42051.08901.09671.09672.37613.1820
C21.50571.22042.10132.15452.15451.35091.8446
O32.42051.22042.52373.13223.13222.25692.2432
H41.08902.10132.52371.79301.79303.27473.9387
H51.09672.15453.13221.79301.77172.67083.5375
H61.09672.15453.13221.79301.77172.67083.5375
O72.37611.35092.25693.27472.67082.67080.9747
H83.18201.84462.24323.93873.53753.53750.9747

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 124.891 C1 C2 O7 112.451
C2 C1 H4 107.065 C2 C1 H5 110.787
C2 C1 H6 110.787 C2 O7 H8 103.789
O3 C2 O7 122.658 H4 C1 H5 110.231
H4 C1 H6 110.231 H5 C1 H6 107.758
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability