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

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-229.021606
Energy at 298.15K-229.026444
Nuclear repulsion energy121.282861
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 mPW1PW91/6-31G*
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' 3755 3561 52.94      
2 A' 3225 3058 4.21      
3 A' 3101 2941 1.30      
4 A' 1893 1795 304.52      
5 A' 1503 1425 14.83      
6 A' 1446 1372 88.19      
7 A' 1377 1306 22.53      
8 A' 1244 1180 213.69      
9 A' 1017 965 46.02      
10 A' 887 841 2.87      
11 A' 589 559 45.44      
12 A' 422 400 4.58      
13 A" 3174 3010 3.39      
14 A" 1507 1429 10.20      
15 A" 1083 1027 11.13      
16 A" 698 662 114.17      
17 A" 552 524 20.28      
18 A" 77 73 0.62      

Unscaled Zero Point Vibrational Energy (zpe) 13775.0 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 13062.9 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 mPW1PW91/6-31G*
ABC
0.37997 0.31669 0.17844

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.050 -0.919 0.000
C2 0.000 0.154 0.000
O3 0.199 1.344 0.000
H4 2.038 -0.462 0.000
H5 0.932 -1.556 0.880
H6 0.932 -1.556 -0.880
O7 -1.242 -0.372 0.000
H8 -1.852 0.384 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50102.41741.08841.09311.09312.35653.1810
C21.50101.20632.12882.13742.13741.34931.8663
O32.41741.20632.57733.11813.11812.24112.2643
H41.08842.12882.57731.78711.78713.28133.9807
H51.09312.13743.11811.78711.76082.62793.5060
H61.09312.13743.11811.78711.76082.62793.5060
O72.35651.34932.24113.28132.62792.62790.9716
H83.18101.86632.26433.98073.50603.50600.9716

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 126.138 C1 C2 O7 111.418
C2 C1 H4 109.562 C2 C1 H5 109.964
C2 C1 H6 109.964 C2 O7 H8 105.904
O3 C2 O7 122.445 H4 C1 H5 110.013
H4 C1 H6 110.013 H5 C1 H6 107.298
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.601      
2 C 0.572      
3 O -0.463      
4 H 0.214      
5 H 0.213      
6 H 0.213      
7 O -0.574      
8 H 0.425      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.435 -1.556 0.000 1.616
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.687 -3.797 0.000
y -3.797 -26.496 0.000
z 0.000 0.000 -22.618
Traceless
 xyz
x 4.870 -3.797 0.000
y -3.797 -5.343 0.000
z 0.000 0.000 0.474
Polar
3z2-r20.947
x2-y26.809
xy-3.797
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 70.440
(<r2>)1/2 8.393