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

using model chemistry: B3LYP/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 B3LYP/6-311G*
 hartrees
Energy at 0K-229.146084
Energy at 298.15K-229.150914
Nuclear repulsion energy121.074352
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 B3LYP/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' 3728 3603 30.77      
2 A' 3165 3059 8.99      
3 A' 3057 2954 2.97      
4 A' 1841 1779 317.27      
5 A' 1490 1440 17.46      
6 A' 1421 1373 55.47      
7 A' 1355 1309 12.40      
8 A' 1224 1182 241.14      
9 A' 1004 971 70.81      
10 A' 862 833 3.43      
11 A' 589 569 42.44      
12 A' 422 408 4.22      
13 A" 3115 3010 8.30      
14 A" 1493 1442 10.88      
15 A" 1078 1041 8.76      
16 A" 698 675 122.27      
17 A" 552 533 20.84      
18 A" 72 70 0.59      

Unscaled Zero Point Vibrational Energy (zpe) 13582.2 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 13124.5 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 B3LYP/6-311G*
ABC
0.37858 0.31512 0.17762

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.066 -0.905 0.000
C2 0.000 0.158 0.000
O3 0.179 1.348 0.000
H4 2.048 -0.438 0.000
H5 0.959 -1.544 0.879
H6 0.959 -1.544 -0.879
O7 -1.241 -0.390 0.000
H8 -1.874 0.344 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50562.42111.08751.09241.09242.36383.1943
C21.50561.20332.13332.14262.14261.35651.8829
O32.42111.20332.58493.12183.12182.24452.2853
H41.08752.13332.58491.78441.78443.28953.9993
H51.09242.14263.12181.78441.75832.63523.5162
H61.09242.14263.12181.78441.75832.63523.5162
O72.36381.35652.24453.28952.63522.63520.9694
H83.19431.88292.28533.99933.51623.51620.9694

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 126.332 C1 C2 O7 111.253
C2 C1 H4 109.654 C2 C1 H5 110.102
C2 C1 H6 110.102 C2 O7 H8 106.919
O3 C2 O7 122.414 H4 C1 H5 109.886
H4 C1 H6 109.886 H5 C1 H6 107.178
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.675     -0.472
2 C 0.384     0.778
3 O -0.329     -0.545
4 H 0.241     0.131
5 H 0.240     0.149
6 H 0.240     0.149
7 O -0.493     -0.615
8 H 0.393     0.425


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.408 -1.483 0.000 1.538
CHELPG        
AIM        
ESP -0.388 -1.521 0.000 1.570


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.100 -3.748 0.000
y -3.748 -27.290 0.000
z 0.000 0.000 -23.059
Traceless
 xyz
x 5.074 -3.748 0.000
y -3.748 -5.711 0.000
z 0.000 0.000 0.636
Polar
3z2-r21.272
x2-y27.190
xy-3.748
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.688 -0.154 0.000
y -0.154 4.759 0.000
z 0.000 0.000 2.960


<r2> (average value of r2) Å2
<r2> 71.050
(<r2>)1/2 8.429