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

using model chemistry: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-228.856610
Energy at 298.15K-228.861450
HF Energy-228.653631
Nuclear repulsion energy120.752251
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 B2PLYP/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3705 3516 50.83      
2 A' 3224 3060 5.25      
3 A' 3107 2949 1.79      
4 A' 1852 1758 265.51      
5 A' 1522 1445 14.01      
6 A' 1454 1380 55.62      
7 A' 1378 1308 32.08      
8 A' 1235 1173 207.27      
9 A' 1024 972 62.89      
10 A' 876 831 2.38      
11 A' 583 554 43.82      
12 A' 422 401 4.25      
13 A" 3177 3015 4.61      
14 A" 1526 1448 8.73      
15 A" 1093 1038 8.22      
16 A" 693 658 117.09      
17 A" 550 522 18.37      
18 A" 82 78 0.55      

Unscaled Zero Point Vibrational Energy (zpe) 13751.2 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 13052.6 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 B2PLYP/6-31G*
ABC
0.37534 0.31484 0.17684

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.995 -0.985 0.000
C2 0.000 0.144 0.000
O3 0.291 1.328 0.000
H4 1.985 -0.539 0.000
H5 0.867 -1.618 0.882
H6 0.867 -1.618 -0.882
O7 -1.277 -0.292 0.000
H8 -1.802 0.527 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50472.41761.08561.09361.09362.37553.1791
C21.50471.21952.09932.15302.15301.34981.8418
O32.41761.21952.52113.12903.12902.25552.2410
H41.08562.09932.52111.78661.78663.27173.9339
H51.09362.15303.12901.78661.76462.67113.5359
H61.09362.15303.12901.78661.76462.67113.5359
O72.37551.34982.25553.27172.67112.67110.9728
H83.17911.84182.24103.93393.53593.53590.9728

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 124.779 C1 C2 O7 112.536
C2 C1 H4 107.168 C2 C1 H5 110.922
C2 C1 H6 110.922 C2 O7 H8 103.744
O3 C2 O7 122.685 H4 C1 H5 110.139
H4 C1 H6 110.139 H5 C1 H6 107.572
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.535      
2 C 0.559      
3 O -0.447      
4 H 0.193      
5 H 0.193      
6 H 0.193      
7 O -0.576      
8 H 0.421      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.378 -1.493 0.000 1.540
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.934 -3.693 0.000
y -3.693 -26.859 0.000
z 0.000 0.000 -22.822
Traceless
 xyz
x 4.906 -3.693 0.000
y -3.693 -5.481 0.000
z 0.000 0.000 0.575
Polar
3z2-r21.150
x2-y26.925
xy-3.693
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.370 -0.070 0.000
y -0.070 4.552 0.000
z 0.000 0.000 2.749


<r2> (average value of r2) Å2
<r2> 71.068
(<r2>)1/2 8.430