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

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at G4
 hartrees
Energy at 0K-228.982859
Energy at 298.15K-228.977326
HF Energy-229.104693
Nuclear repulsion energy121.068949
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/6-31G(2df,p)
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' 3749 3618 46.03      
2 A' 3173 3062 5.54      
3 A' 3058 2951 1.88      
4 A' 1848 1784 277.88      
5 A' 1470 1419 12.56      
6 A' 1408 1358 57.37      
7 A' 1350 1303 16.28      
8 A' 1212 1170 202.25      
9 A' 996 962 58.69      
10 A' 862 832 2.95      
11 A' 583 563 39.50      
12 A' 417 402 3.83      
13 A" 3122 3013 4.44      
14 A" 1476 1424 6.92      
15 A" 1066 1029 8.08      
16 A" 682 658 91.27      
17 A" 548 529 19.27      
18 A" 79 76 0.38      

Unscaled Zero Point Vibrational Energy (zpe) 13549.7 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 13075.4 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 B3LYP/6-31G(2df,p)
ABC
0.37823 0.31532 0.17763

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.055 -0.918 0.000
C2 0.000 0.158 0.000
O3 0.197 1.346 0.000
H4 2.043 -0.460 0.000
H5 0.937 -1.556 0.881
H6 0.937 -1.556 -0.881
O7 -1.245 -0.376 0.000
H8 -1.858 0.375 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50762.42171.08891.09381.09382.36383.1874
C21.50761.20382.13432.14322.14321.35521.8705
O32.42171.20382.58243.12193.12192.24612.2722
H41.08892.13432.58241.78901.78903.28933.9890
H51.09382.14323.12191.78901.76132.63283.5096
H61.09382.14323.12191.78901.76132.63283.5096
O72.36381.35522.24613.28932.63282.63280.9692
H83.18741.87052.27223.98903.50963.50960.9692

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 125.765 C1 C2 O7 110.946
C2 C1 H4 109.406 C2 C1 H5 110.018
C2 C1 H6 110.018 C2 O7 H8 106.683
O3 C2 O7 123.289 H4 C1 H5 110.056
H4 C1 H6 110.056 H5 C1 H6 107.264
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.468      
2 C 0.405      
3 O -0.332      
4 H 0.151      
5 H 0.154      
6 H 0.154      
7 O -0.364      
8 H 0.301      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.404 -1.550 0.000 1.602
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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> 70.692
(<r2>)1/2 8.408