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

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-227.728728
Energy at 298.15K-227.733554
Nuclear repulsion energy119.744381
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 B3PW91/3-21G*
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' 3519 3376 15.70      
2 A' 3200 3070 3.65      
3 A' 3084 2959 0.38      
4 A' 1808 1734 194.67      
5 A' 1523 1462 22.55      
6 A' 1441 1382 52.55      
7 A' 1381 1325 29.47      
8 A' 1180 1132 188.43      
9 A' 1002 962 95.15      
10 A' 849 814 1.78      
11 A' 567 544 44.09      
12 A' 407 390 4.45      
13 A" 3148 3020 2.14      
14 A" 1535 1473 13.13      
15 A" 1102 1058 13.51      
16 A" 679 652 130.52      
17 A" 558 535 32.41      
18 A" 92 88 1.32      

Unscaled Zero Point Vibrational Energy (zpe) 13537.6 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 12988.0 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 B3PW91/3-21G*
ABC
0.36562 0.31336 0.17423

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.140 -0.816 0.000
C2 0.000 0.166 0.000
O3 0.059 1.388 0.000
H4 2.087 -0.277 0.000
H5 1.069 -1.460 0.883
H6 1.069 -1.460 -0.883
O7 -1.200 -0.519 0.000
H8 -1.938 0.149 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50452.45471.09001.09511.09512.35863.2254
C21.50451.22362.13312.13642.13641.38171.9380
O32.45471.22362.62313.14763.14762.28542.3506
H41.09002.13312.62311.79331.79333.29574.0470
H51.09512.13643.14761.79331.76682.61003.5223
H61.09512.13643.14761.79331.76682.61003.5223
O72.35861.38172.28543.29572.61002.61000.9952
H83.22541.93802.35064.04703.52233.52230.9952

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 127.966 C1 C2 O7 109.534
C2 C1 H4 109.571 C2 C1 H5 109.533
C2 C1 H6 109.533 C2 O7 H8 108.141
O3 C2 O7 122.500 H4 C1 H5 110.313
H4 C1 H6 110.313 H5 C1 H6 107.549
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.696      
2 C 0.601      
3 O -0.481      
4 H 0.250      
5 H 0.258      
6 H 0.258      
7 O -0.564      
8 H 0.374      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.319 -1.404 0.000 1.440
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.806 -3.197 0.000
y -3.197 -27.564 0.000
z 0.000 0.000 -22.657
Traceless
 xyz
x 6.304 -3.197 0.000
y -3.197 -6.832 0.000
z 0.000 0.000 0.528
Polar
3z2-r21.056
x2-y28.758
xy-3.197
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> 71.757
(<r2>)1/2 8.471