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

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31G*
 hartrees
Energy at 0K-228.848980
Energy at 298.15K-228.853814
Nuclear repulsion energy121.258771
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 HSEh1PBE/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' 3744 3560 51.50      
2 A' 3221 3063 4.10      
3 A' 3096 2944 1.23      
4 A' 1892 1799 302.76      
5 A' 1497 1424 14.75      
6 A' 1443 1372 91.51      
7 A' 1373 1306 18.76      
8 A' 1243 1182 214.64      
9 A' 1014 964 44.53      
10 A' 888 844 2.89      
11 A' 589 560 45.42      
12 A' 422 401 4.54      
13 A" 3169 3014 3.28      
14 A" 1501 1428 10.21      
15 A" 1079 1026 11.09      
16 A" 698 664 113.70      
17 A" 552 525 19.56      
18 A" 77 73 0.65      

Unscaled Zero Point Vibrational Energy (zpe) 13747.9 cm-1
Scaled (by 0.951) Zero Point Vibrational Energy (zpe) 13074.3 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 HSEh1PBE/6-31G*
ABC
0.37974 0.31674 0.17842

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.050 -0.918 0.000
C2 0.000 0.154 0.000
O3 0.199 1.344 0.000
H4 2.039 -0.461 0.000
H5 0.932 -1.557 0.881
H6 0.932 -1.557 -0.881
O7 -1.242 -0.373 0.000
H8 -1.851 0.386 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50072.41751.08951.09431.09432.35603.1805
C21.50071.20672.12942.13812.13811.34941.8657
O32.41751.20672.57793.11933.11932.24172.2633
H41.08952.12942.57791.78901.78903.28213.9810
H51.09432.13813.11931.78901.76222.62783.5064
H61.09432.13813.11931.78901.76222.62783.5064
O72.35601.34942.24173.28212.62782.62780.9725
H83.18051.86572.26333.98103.50643.50640.9725

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 126.141 C1 C2 O7 111.395
C2 C1 H4 109.572 C2 C1 H5 109.975
C2 C1 H6 109.975 C2 O7 H8 105.786
O3 C2 O7 122.464 H4 C1 H5 110.017
H4 C1 H6 110.017 H5 C1 H6 107.255
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.597      
2 C 0.563      
3 O -0.457      
4 H 0.212      
5 H 0.211      
6 H 0.211      
7 O -0.569      
8 H 0.424      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.442 -1.547 0.000 1.608
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.742 -3.780 0.000
y -3.780 -26.523 0.000
z 0.000 0.000 -22.664
Traceless
 xyz
x 4.852 -3.780 0.000
y -3.780 -5.320 0.000
z 0.000 0.000 0.468
Polar
3z2-r20.937
x2-y26.781
xy-3.780
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.362 -0.102 0.000
y -0.102 4.552 0.000
z 0.000 0.000 2.774


<r2> (average value of r2) Å2
<r2> 70.479
(<r2>)1/2 8.395