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

using model chemistry: mPW1PW91/6-31+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 mPW1PW91/6-31+G**
 hartrees
Energy at 0K-229.042701
Energy at 298.15K-229.047521
Nuclear repulsion energy121.276432
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 mPW1PW91/6-31+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' 3822 3638 69.57      
2 A' 3220 3065 2.80      
3 A' 3093 2944 1.30      
4 A' 1860 1771 369.62      
5 A' 1477 1406 16.01      
6 A' 1426 1357 97.40      
7 A' 1352 1287 43.46      
8 A' 1224 1165 205.49      
9 A' 1009 960 50.26      
10 A' 884 842 2.97      
11 A' 588 560 43.18      
12 A' 424 404 4.85      
13 A" 3170 3017 2.15      
14 A" 1484 1413 12.09      
15 A" 1070 1018 8.89      
16 A" 678 645 109.10      
17 A" 551 524 27.20      
18 A" 69 66 0.35      

Unscaled Zero Point Vibrational Energy (zpe) 13700.8 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 13040.4 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 mPW1PW91/6-31+G**
ABC
0.38004 0.31657 0.17841

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.055 -0.913 0.000
C2 0.000 0.151 0.000
O3 0.194 1.344 0.000
H4 2.039 -0.450 0.000
H5 0.940 -1.549 0.880
H6 0.940 -1.549 -0.880
O7 -1.242 -0.376 0.000
H8 -1.863 0.367 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.49862.41571.08751.09241.09242.35953.1865
C21.49861.20852.12602.13312.13311.34931.8753
O32.41571.20852.57373.11513.11512.24042.2767
H41.08752.12602.57371.78681.78683.28243.9868
H51.09242.13313.11511.78681.76022.62943.5076
H61.09242.13313.11511.78681.76022.62943.5076
O72.35951.34932.24043.28242.62942.62940.9680
H83.18651.87532.27673.98683.50763.50760.9680

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 126.012 C1 C2 O7 111.782
C2 C1 H4 109.565 C2 C1 H5 109.841
C2 C1 H6 109.841 C2 O7 H8 106.889
O3 C2 O7 122.206 H4 C1 H5 110.108
H4 C1 H6 110.108 H5 C1 H6 107.350
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.500      
2 C 0.395      
3 O -0.451      
4 H 0.204      
5 H 0.204      
6 H 0.204      
7 O -0.427      
8 H 0.372      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.329 -1.777 0.000 1.807
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.148 -4.016 0.000
y -4.016 -27.564 0.000
z 0.000 0.000 -23.251
Traceless
 xyz
x 5.259 -4.016 0.000
y -4.016 -5.864 0.000
z 0.000 0.000 0.605
Polar
3z2-r21.211
x2-y27.416
xy-4.016
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> 70.902
(<r2>)1/2 8.420