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

using model chemistry: B3LYP/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 B3LYP/6-31G**
 hartrees
Energy at 0K-229.091479
Energy at 298.15K-229.096295
Nuclear repulsion energy120.807909
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**
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' 3755 3607 43.97      
2 A' 3186 3061 5.61      
3 A' 3068 2948 1.85      
4 A' 1855 1782 285.71      
5 A' 1484 1426 12.82      
6 A' 1422 1366 65.53      
7 A' 1356 1303 25.30      
8 A' 1218 1170 210.30      
9 A' 1002 963 56.49      
10 A' 866 832 2.75      
11 A' 582 559 42.55      
12 A' 419 403 4.36      
13 A" 3134 3011 5.24      
14 A" 1490 1432 8.28      
15 A" 1070 1028 9.16      
16 A" 684 657 107.75      
17 A" 544 522 19.30      
18 A" 78 75 0.60      

Unscaled Zero Point Vibrational Energy (zpe) 13606.3 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 13072.9 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**
ABC
0.37656 0.31418 0.17690

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.059 -0.917 0.000
C2 0.000 0.155 0.000
O3 0.194 1.350 0.000
H4 2.045 -0.455 0.000
H5 0.944 -1.555 0.881
H6 0.944 -1.555 -0.881
O7 -1.248 -0.380 0.000
H8 -1.861 0.375 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50752.42671.08901.09391.09392.36863.1933
C21.50751.21032.13432.14332.14331.35741.8741
O32.42671.21032.58543.12723.12722.25172.2752
H41.08902.13432.58541.78881.78883.29363.9935
H51.09392.14333.12721.78881.76212.63843.5169
H61.09392.14333.12721.78881.76212.63843.5169
O72.36861.35742.25173.29362.63842.63840.9722
H83.19331.87412.27523.99353.51693.51690.9722

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 126.127 C1 C2 O7 111.426
C2 C1 H4 109.519 C2 C1 H5 109.937
C2 C1 H6 109.937 C2 O7 H8 105.930
O3 C2 O7 122.447 H4 C1 H5 110.059
H4 C1 H6 110.059 H5 C1 H6 107.304
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.376      
2 C 0.546      
3 O -0.454      
4 H 0.145      
5 H 0.145      
6 H 0.145      
7 O -0.474      
8 H 0.322      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.406 -1.555 0.000 1.608
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.811 -3.703 0.000
y -3.703 -26.587 0.000
z 0.000 0.000 -22.667
Traceless
 xyz
x 4.817 -3.703 0.000
y -3.703 -5.348 0.000
z 0.000 0.000 0.532
Polar
3z2-r21.063
x2-y26.776
xy-3.703
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.475 -0.126 0.000
y -0.126 4.602 0.000
z 0.000 0.000 2.808


<r2> (average value of r2) Å2
<r2> 70.956
(<r2>)1/2 8.424