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

using model chemistry: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-229.055175
Energy at 298.15K-229.060008
Nuclear repulsion energy121.358453
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 B3PW91/6-311G*
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' 3756 3616 34.43      
2 A' 3182 3064 7.26      
3 A' 3066 2952 2.34      
4 A' 1858 1789 326.87      
5 A' 1484 1429 17.90      
6 A' 1421 1368 76.51      
7 A' 1355 1304 11.80      
8 A' 1232 1186 242.18      
9 A' 1004 967 57.73      
10 A' 874 842 3.35      
11 A' 591 569 43.97      
12 A' 422 406 4.51      
13 A" 3132 3016 6.36      
14 A" 1487 1432 11.92      
15 A" 1073 1033 10.27      
16 A" 702 676 123.08      
17 A" 554 533 21.84      
18 A" 70 67 0.62      

Unscaled Zero Point Vibrational Energy (zpe) 13631.7 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 13123.2 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 B3PW91/6-311G*
ABC
0.38049 0.31682 0.17858

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.060 -0.906 0.000
C2 0.000 0.156 0.000
O3 0.183 1.345 0.000
H4 2.044 -0.442 0.000
H5 0.950 -1.545 0.879
H6 0.950 -1.545 -0.879
O7 -1.238 -0.385 0.000
H8 -1.865 0.352 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50042.41511.08781.09271.09272.35623.1838
C21.50041.20242.12942.13812.13811.35121.8751
O32.41511.20242.57933.11663.11662.23872.2757
H41.08782.12942.57931.78501.78503.28233.9884
H51.09272.13813.11661.78501.75832.62843.5070
H61.09272.13813.11661.78501.75832.62843.5070
O72.35621.35122.23873.28232.62842.62840.9677
H83.18381.87512.27573.98843.50703.50700.9677

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 126.292 C1 C2 O7 111.329
C2 C1 H4 109.690 C2 C1 H5 110.088
C2 C1 H6 110.088 C2 O7 H8 106.747
O3 C2 O7 122.379 H4 C1 H5 109.898
H4 C1 H6 109.898 H5 C1 H6 107.146
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.719      
2 C 0.396      
3 O -0.342      
4 H 0.256      
5 H 0.254      
6 H 0.254      
7 O -0.501      
8 H 0.403      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.432 -1.505 0.000 1.566
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.868 -3.803 0.000
y -3.803 -27.066 0.000
z 0.000 0.000 -22.904
Traceless
 xyz
x 5.117 -3.803 0.000
y -3.803 -5.680 0.000
z 0.000 0.000 0.563
Polar
3z2-r21.126
x2-y27.198
xy-3.803
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 70.633
(<r2>)1/2 8.404