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

using model chemistry: HF/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 HF/CEP-121G*
 hartrees
Energy at 0K-44.728520
Energy at 298.15K-44.733508
Nuclear repulsion energy68.267603
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 HF/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' 4084 3690 90.93      
2 A' 3334 3012 16.17      
3 A' 3218 2907 6.76      
4 A' 1985 1793 478.52      
5 A' 1603 1449 13.95      
6 A' 1558 1407 67.62      
7 A' 1459 1318 37.92      
8 A' 1348 1218 269.18      
9 A' 1101 995 64.13      
10 A' 923 833 1.44      
11 A' 629 568 56.73      
12 A' 444 401 4.06      
13 A" 3289 2971 17.23      
14 A" 1608 1453 7.63      
15 A" 1172 1059 8.62      
16 A" 711 642 139.37      
17 A" 581 525 35.45      
18 A" 86 78 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 14567.0 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 13159.9 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 HF/CEP-121G*
ABC
0.38679 0.31448 0.17917

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.044 -0.922 0.000
C2 0.000 0.173 0.000
O3 0.217 1.347 0.000
H4 2.029 -0.478 0.000
H5 0.913 -1.547 0.877
H6 0.913 -1.547 -0.877
O7 -1.247 -0.321 0.000
H8 -1.852 0.414 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.51302.41471.08061.08501.08502.36863.1892
C21.51301.19352.13132.13612.13611.34161.8675
O32.41471.19352.57183.10293.10292.21952.2694
H41.08062.13132.57181.77671.77673.28023.9824
H51.08502.13613.10291.77671.75442.63453.5018
H61.08502.13613.10291.77671.75442.63453.5018
O72.36861.34162.21953.28022.63452.63450.9520
H83.18921.86752.26943.98243.50183.50180.9520

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 125.887 C1 C2 O7 112.009
C2 C1 H4 109.385 C2 C1 H5 109.508
C2 C1 H6 109.508 C2 O7 H8 107.810
O3 C2 O7 122.104 H4 C1 H5 110.259
H4 C1 H6 110.259 H5 C1 H6 107.899
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.586      
2 C 0.500      
3 O -0.419      
4 H 0.205      
5 H 0.192      
6 H 0.192      
7 O -0.552      
8 H 0.468      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.392 -1.822 0.000 1.864
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.174 -4.354 0.000
y -4.354 -27.636 0.000
z 0.000 0.000 -22.982
Traceless
 xyz
x 5.135 -4.354 0.000
y -4.354 -6.058 0.000
z 0.000 0.000 0.923
Polar
3z2-r21.845
x2-y27.462
xy-4.354
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.146 -0.016 0.000
y -0.016 4.563 0.000
z 0.000 0.000 3.060


<r2> (average value of r2) Å2
<r2> 59.676
(<r2>)1/2 7.725