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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-228.831982
Energy at 298.15K-228.836699
Nuclear repulsion energy120.077340
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' 3632 3582 28.96      
2 A' 3132 3090 4.03      
3 A' 3007 2966 1.47      
4 A' 1799 1775 252.53      
5 A' 1435 1415 13.45      
6 A' 1369 1350 72.37      
7 A' 1309 1291 13.34      
8 A' 1174 1158 194.84      
9 A' 961 948 51.31      
10 A' 846 835 3.02      
11 A' 562 554 38.91      
12 A' 406 401 4.57      
13 A" 3080 3038 3.48      
14 A" 1439 1420 9.43      
15 A" 1026 1012 8.57      
16 A" 679 670 97.71      
17 A" 528 521 15.73      
18 A" 64 63 0.77      

Unscaled Zero Point Vibrational Energy (zpe) 13224.7 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 13043.5 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
0.37051 0.31212 0.17498

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 1.068 -0.912 0.000
C2 0.000 0.156 0.000
O3 0.186 1.362 0.000
H4 2.057 -0.439 0.000
H5 0.959 -1.557 0.886
H6 0.959 -1.557 -0.886
O7 -1.251 -0.397 0.000
H8 -1.861 0.372 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.51032.43941.09631.10141.10142.37583.1981
C21.51031.22072.14172.15342.15341.36781.8731
O32.43941.22072.59783.14693.14692.27142.2730
H41.09632.14172.59781.80041.80043.30884.0012
H51.10142.15343.14691.80041.77242.64833.5292
H61.10142.15343.14691.80041.77242.64833.5292
O72.37581.36782.27143.30882.64832.64830.9817
H83.19811.87312.27304.00123.52923.52920.9817

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 126.236 C1 C2 O7 111.177
C2 C1 H4 109.474 C2 C1 H5 110.091
C2 C1 H6 110.091 C2 O7 H8 104.537
O3 C2 O7 122.587 H4 C1 H5 110.008
H4 C1 H6 110.008 H5 C1 H6 107.144
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 -0.427      
2 C 0.492      
3 O -0.422      
4 H 0.159      
5 H 0.161      
6 H 0.161      
7 O -0.439      
8 H 0.316      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.402 -1.498 0.000 1.551
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.773 -3.543 0.000
y -3.543 -26.392 0.000
z 0.000 0.000 -22.740
Traceless
 xyz
x 4.793 -3.543 0.000
y -3.543 -5.135 0.000
z 0.000 0.000 0.342
Polar
3z2-r20.684
x2-y26.618
xy-3.543
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.723 -0.167 0.000
y -0.167 4.775 0.000
z 0.000 0.000 2.869


<r2> (average value of r2) Å2
<r2> 71.514
(<r2>)1/2 8.457