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

using model chemistry: HF/CEP-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 HF/CEP-31G
 hartrees
Energy at 0K-44.606611
Energy at 298.15K-44.611596
Nuclear repulsion energy67.260269
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 HF/CEP-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' 4046 3647 92.15      
2 A' 3379 3045 23.54      
3 A' 3254 2933 8.95      
4 A' 1873 1689 386.62      
5 A' 1611 1452 25.72      
6 A' 1571 1416 44.82      
7 A' 1457 1313 109.90      
8 A' 1289 1162 199.50      
9 A' 1116 1006 101.29      
10 A' 921 830 4.67      
11 A' 602 543 68.35      
12 A' 436 393 5.91      
13 A" 3338 3009 24.06      
14 A" 1614 1455 15.49      
15 A" 1199 1081 14.06      
16 A" 683 616 208.47      
17 A" 577 520 56.14      
18 A" 109 99 0.29      

Unscaled Zero Point Vibrational Energy (zpe) 14536.3 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 13103.0 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 HF/CEP-31G
ABC
0.37137 0.30876 0.17401

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.125 -0.840 0.000
C2 0.000 0.170 0.000
O3 0.115 1.390 0.000
H4 2.076 -0.322 0.000
H5 1.042 -1.475 0.879
H6 1.042 -1.475 -0.879
O7 -1.231 -0.429 0.000
H8 -1.963 0.192 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.51222.44801.08321.08721.08722.39203.2561
C21.51221.22492.13402.13612.13611.36951.9630
O32.44801.22492.60333.13613.13612.26302.3982
H41.08322.13402.60331.78081.78083.30944.0719
H51.08722.13613.13611.78081.75792.65173.5467
H61.08722.13613.13611.78081.75792.65173.5467
O72.39201.36952.26303.30942.65172.65170.9601
H83.25611.96302.39824.07193.54673.54670.9601

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 126.532 C1 C2 O7 112.118
C2 C1 H4 109.504 C2 C1 H5 109.434
C2 C1 H6 109.434 C2 O7 H8 113.683
O3 C2 O7 121.350 H4 C1 H5 110.276
H4 C1 H6 110.276 H5 C1 H6 107.890
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.227      
2 C 0.089      
3 O -0.244      
4 H 0.153      
5 H 0.139      
6 H 0.139      
7 O -0.478      
8 H 0.430      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.141 -2.096 0.000 2.100
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.252 -4.384 0.000
y -4.384 -30.150 0.000
z 0.000 0.000 -23.216
Traceless
 xyz
x 7.431 -4.384 0.000
y -4.384 -8.916 0.000
z 0.000 0.000 1.485
Polar
3z2-r22.970
x2-y210.898
xy-4.384
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.813 -0.043 0.000
y -0.043 4.411 0.000
z 0.000 0.000 2.551


<r2> (average value of r2) Å2
<r2> 61.360
(<r2>)1/2 7.833