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

using model chemistry: mPW1PW91/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-311G**
 hartrees
Energy at 0K-229.093286
Energy at 298.15K-229.098136
Nuclear repulsion energy121.634704
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 mPW1PW91/6-311G**
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' 3821 3656 60.21      
2 A' 3200 3062 4.78      
3 A' 3080 2947 1.41      
4 A' 1874 1793 330.11      
5 A' 1473 1409 15.29      
6 A' 1421 1360 96.01      
7 A' 1353 1294 16.28      
8 A' 1231 1177 222.83      
9 A' 1005 961 52.11      
10 A' 883 845 3.45      
11 A' 595 569 44.62      
12 A' 424 406 4.02      
13 A" 3151 3015 4.28      
14 A" 1477 1413 11.26      
15 A" 1069 1023 10.23      
16 A" 685 656 103.63      
17 A" 550 526 24.11      
18 A" 76 72 0.56      

Unscaled Zero Point Vibrational Energy (zpe) 13683.4 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 13090.9 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 mPW1PW91/6-311G**
ABC
0.38220 0.31825 0.17941

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.052 -0.912 0.000
C2 0.000 0.155 0.000
O3 0.193 1.339 0.000
H4 2.036 -0.452 0.000
H5 0.934 -1.547 0.879
H6 0.934 -1.547 -0.879
O7 -1.239 -0.375 0.000
H8 -1.851 0.371 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.49822.40911.08631.09111.09112.35333.1741
C21.49821.20002.12462.13102.13101.34761.8638
O32.40911.20002.56963.10663.10662.23392.2623
H41.08632.12462.56961.78551.78553.27623.9735
H51.09112.13103.10661.78551.75822.62073.4940
H61.09112.13103.10661.78551.75822.62073.4940
O72.35331.34762.23393.27622.62072.62070.9649
H83.17411.86382.26233.97353.49403.49400.9649

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 126.113 C1 C2 O7 111.461
C2 C1 H4 109.555 C2 C1 H5 109.777
C2 C1 H6 109.777 C2 O7 H8 106.225
O3 C2 O7 122.426 H4 C1 H5 110.176
H4 C1 H6 110.176 H5 C1 H6 107.351
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.344      
2 C 0.306      
3 O -0.350      
4 H 0.155      
5 H 0.152      
6 H 0.152      
7 O -0.327      
8 H 0.256      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.402 -1.590 0.000 1.640
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.994 -3.747 0.000
y -3.747 -26.880 0.000
z 0.000 0.000 -22.805
Traceless
 xyz
x 4.849 -3.747 0.000
y -3.747 -5.481 0.000
z 0.000 0.000 0.632
Polar
3z2-r21.264
x2-y26.886
xy-3.747
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.614 -0.148 0.000
y -0.148 4.762 0.000
z 0.000 0.000 3.005


<r2> (average value of r2) Å2
<r2> 70.325
(<r2>)1/2 8.386