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

using model chemistry: HF/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 HF/6-31G*
 hartrees
Energy at 0K-227.810648
Energy at 298.15K 
HF Energy-227.810648
Nuclear repulsion energy122.456345
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/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 4055 3644 106.19      
2 A 3344 3005 10.14      
3 A 3296 2961 9.53      
4 A 3232 2904 3.60      
5 A 2042 1835 426.22      
6 A 1620 1455 6.74      
7 A 1614 1450 13.43      
8 A 1574 1414 75.76      
9 A 1483 1333 48.48      
10 A 1355 1217 248.45      
11 A 1184 1064 13.25      
12 A 1114 1001 55.36      
13 A 938 843 1.68      
14 A 725 651 138.18      
15 A 637 573 57.92      
16 A 587 527 35.04      
17 A 451 405 4.31      
18 A 102 92 0.21      

Unscaled Zero Point Vibrational Energy (zpe) 14675.8 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 13186.2 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/6-31G*
ABC
0.39043 0.31910 0.18142

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.387 -0.123 0.000
C2 -0.095 0.123 0.000
O3 -0.622 1.187 0.000
H4 1.910 0.821 -0.000
H5 1.660 -0.701 0.875
H6 1.660 -0.701 -0.875
O7 -0.786 -1.015 0.000
H8 -1.714 -0.798 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50192.39791.07941.08381.08382.34933.1732
C21.50191.18702.12322.12732.12731.33221.8628
O32.39791.18702.55863.08843.08842.20832.2655
H41.07942.12322.55861.77341.77343.26273.9694
H51.08382.12733.08841.77341.75002.61743.4869
H61.08382.12733.08841.77341.75002.61743.4869
O72.34931.33222.20833.26272.61742.61740.9523
H83.17321.86282.26553.96943.48693.48690.9523

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 125.796 C1 C2 O7 111.842
C2 C1 H4 109.585 C2 C1 H5 109.655
C2 C1 H6 109.655 C2 O7 H8 108.100
O3 C2 O7 122.362 H4 C1 H5 110.126
H4 C1 H6 110.126 H5 C1 H6 107.668
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.571      
2 C 0.724      
3 O -0.551      
4 H 0.211      
5 H 0.205      
6 H 0.205      
7 O -0.688      
8 H 0.465      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.693 -1.654 0.000 1.793
CHELPG -0.448 -1.774 0.000 1.829
AIM        
ESP -0.441 -1.778 0.000 1.831


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.726 2.277 0.000
y 2.277 -28.677 0.000
z 0.000 0.000 -22.764
Traceless
 xyz
x 6.994 2.277 0.000
y 2.277 -7.932 0.000
z 0.000 0.000 0.938
Polar
3z2-r21.876
x2-y29.950
xy2.277
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.999 -0.181 0.000
y -0.181 4.081 0.000
z 0.000 0.000 2.687


<r2> (average value of r2) Å2
<r2> 69.860
(<r2>)1/2 8.358