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

using model chemistry: PBEPBE/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 PBEPBE/6-31G*
 hartrees
Energy at 0K-228.822629
Energy at 298.15K-228.827343
Nuclear repulsion energy120.000563
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 PBEPBE/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' 3562 3511 26.14      
2 A' 3130 3085 4.58      
3 A' 3009 2966 1.68      
4 A' 1802 1776 253.34      
5 A' 1453 1432 14.70      
6 A' 1380 1361 61.75      
7 A' 1320 1302 15.66      
8 A' 1183 1166 198.08      
9 A' 969 955 54.17      
10 A' 847 835 2.96      
11 A' 562 554 38.65      
12 A' 407 401 4.59      
13 A" 3077 3033 3.83      
14 A" 1456 1435 9.95      
15 A" 1037 1022 8.70      
16 A" 685 675 100.79      
17 A" 531 523 15.42      
18 A" 62 61 0.79      

Unscaled Zero Point Vibrational Energy (zpe) 13236.4 cm-1
Scaled (by 0.9857) Zero Point Vibrational Energy (zpe) 13047.1 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 PBEPBE/6-31G*
ABC
0.37024 0.31172 0.17480

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.071 -0.910 0.000
C2 0.000 0.156 0.000
O3 0.181 1.363 0.000
H4 2.061 -0.435 0.000
H5 0.964 -1.556 0.887
H6 0.964 -1.556 -0.887
O7 -1.250 -0.401 0.000
H8 -1.865 0.369 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.51112.44081.09761.10271.10272.37613.2026
C21.51111.22052.14372.15582.15581.36881.8774
O32.44081.22052.60093.14963.14962.27212.2756
H41.09762.14372.60091.80161.80163.31094.0074
H51.10272.15583.14961.80161.77462.65013.5351
H61.10272.15583.14961.80161.77462.65013.5351
O72.37611.36882.27213.31092.65012.65010.9856
H83.20261.87742.27564.00743.53513.53510.9856

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 126.320 C1 C2 O7 111.098
C2 C1 H4 109.500 C2 C1 H5 110.157
C2 C1 H6 110.157 C2 O7 H8 104.591
O3 C2 O7 122.582 H4 C1 H5 109.923
H4 C1 H6 109.923 H5 C1 H6 107.153
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.560      
2 C 0.506      
3 O -0.420      
4 H 0.198      
5 H 0.199      
6 H 0.199      
7 O -0.519      
8 H 0.398      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.401 -1.473 0.000 1.527
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.759 -3.546 0.000
y -3.546 -26.454 0.000
z 0.000 0.000 -22.764
Traceless
 xyz
x 4.850 -3.546 0.000
y -3.546 -5.192 0.000
z 0.000 0.000 0.343
Polar
3z2-r20.685
x2-y26.695
xy-3.546
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.682 -0.160 0.000
y -0.160 4.741 0.000
z 0.000 0.000 2.830


<r2> (average value of r2) Å2
<r2> 71.599
(<r2>)1/2 8.462