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

using model chemistry: B3PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31+G**
 hartrees
Energy at 0K-229.016061
Energy at 298.15K-229.020858
Nuclear repulsion energy121.006540
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 B3PW91/6-31+G**
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' 3788 3637 63.39      
2 A' 3201 3073 3.22      
3 A' 3076 2953 1.51      
4 A' 1842 1768 360.68      
5 A' 1470 1411 16.17      
6 A' 1414 1358 86.92      
7 A' 1342 1288 44.55      
8 A' 1213 1164 206.69      
9 A' 1001 961 54.17      
10 A' 875 840 3.17      
11 A' 583 560 41.69      
12 A' 422 405 4.87      
13 A" 3150 3025 2.53      
14 A" 1477 1418 11.85      
15 A" 1062 1020 8.55      
16 A" 674 647 107.56      
17 A" 548 526 26.42      
18 A" 66 64 0.37      

Unscaled Zero Point Vibrational Energy (zpe) 13601.4 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 13058.7 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 B3PW91/6-31+G**
ABC
0.37815 0.31530 0.17761

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.061 -0.911 0.000
C2 0.000 0.152 0.000
O3 0.189 1.348 0.000
H4 2.045 -0.444 0.000
H5 0.948 -1.549 0.881
H6 0.948 -1.549 -0.881
O7 -1.244 -0.381 0.000
H8 -1.867 0.362 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50122.42071.08911.09401.09402.36463.1927
C21.50121.21112.12972.13722.13721.35351.8793
O32.42071.21112.57933.12153.12152.24632.2809
H41.08912.12972.57931.78901.78903.28933.9943
H51.09402.13723.12151.78901.76242.63523.5151
H61.09402.13723.12151.78901.76242.63523.5151
O72.36461.35352.24633.28932.63522.63520.9704
H83.19271.87932.28093.99433.51513.51510.9704

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 126.048 C1 C2 O7 111.751
C2 C1 H4 109.581 C2 C1 H5 109.890
C2 C1 H6 109.890 C2 O7 H8 106.770
O3 C2 O7 122.201 H4 C1 H5 110.066
H4 C1 H6 110.066 H5 C1 H6 107.320
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.487      
2 C 0.393      
3 O -0.449      
4 H 0.200      
5 H 0.199      
6 H 0.199      
7 O -0.423      
8 H 0.368      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.321 -1.763 0.000 1.792
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.118 -3.987 0.000
y -3.987 -27.568 0.000
z 0.000 0.000 -23.247
Traceless
 xyz
x 5.289 -3.987 0.000
y -3.987 -5.885 0.000
z 0.000 0.000 0.596
Polar
3z2-r21.191
x2-y27.449
xy-3.987
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> 71.143
(<r2>)1/2 8.435