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

using model chemistry: PBEPBE/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-228.918257
Energy at 298.15K 
HF Energy-228.918257
Nuclear repulsion energy120.499234
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/6-311+G(3df,2p)
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' 410 407 4.69      
2 A' 565 560 33.99      
3 A' 840 833 4.79      
4 A' 956 948 67.04      
5 A' 1159 1149 200.21      
6 A' 1291 1280 23.28      
7 A' 1351 1340 54.39      
8 A' 1421 1409 17.05      
9 A' 1764 1749 310.87      
10 A' 2988 2964 1.30      
11 A' 3103 3078 3.37      
12 A' 3640 3610 43.27      
13 A" 62 62 0.24      
14 A" 530 526 19.41      
15 A" 657 652 84.89      
16 A" 1021 1013 6.49      
17 A" 1424 1413 9.62      
18 A" 3051 3026 2.45      

Unscaled Zero Point Vibrational Energy (zpe) 13117.1 cm-1
Scaled (by 0.9918) Zero Point Vibrational Energy (zpe) 13009.5 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/6-311+G(3df,2p)
ABC
0.37355 0.31391 0.17618

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.075 -0.898 0.000
C2 0.000 0.155 0.000
O3 0.174 1.356 0.000
H4 2.058 -0.420 0.000
H5 0.970 -1.542 0.883
H6 0.970 -1.542 -0.883
O7 -1.246 -0.404 0.000
H8 -1.873 0.346 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50462.42681.09291.09831.09832.37243.1990
C21.50461.21312.13652.14502.14501.36551.8823
O32.42681.21312.58863.13213.13212.26112.2821
H41.09292.13652.58861.79531.79533.30344.0042
H51.09832.14503.13211.79531.76632.64253.5247
H61.09832.14503.13211.79531.76632.64253.5247
O72.37241.36552.26113.30342.64252.64250.9776
H83.19901.88232.28214.00423.52473.52470.9776

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 126.163 C1 C2 O7 111.410
C2 C1 H4 109.660 C2 C1 H5 110.012
C2 C1 H6 110.012 C2 O7 H8 105.711
O3 C2 O7 122.427 H4 C1 H5 110.034
H4 C1 H6 110.034 H5 C1 H6 107.055
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.305      
2 C 0.814      
3 O -0.687      
4 H 0.146      
5 H 0.144      
6 H 0.144      
7 O -0.506      
8 H 0.251      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.239 -1.718 0.000 1.735
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.441 -3.610 0.000
y -3.610 -27.623 0.000
z 0.000 0.000 -23.483
Traceless
 xyz
x 5.112 -3.610 0.000
y -3.610 -5.661 0.000
z 0.000 0.000 0.549
Polar
3z2-r21.098
x2-y27.181
xy-3.610
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.908 -0.189 0.000
y -0.189 5.960 0.000
z 0.000 0.000 4.004


<r2> (average value of r2) Å2
<r2> 71.705
(<r2>)1/2 8.468