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

using model chemistry: B3PW91/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/cc-pVDZ
 hartrees
Energy at 0K-229.015768
Energy at 298.15K-229.020584
Nuclear repulsion energy121.056259
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 B3PW91/cc-pVDZ
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' 3736 3605 56.46      
2 A' 3199 3087 2.87      
3 A' 3068 2961 1.62      
4 A' 1863 1798 305.73      
5 A' 1439 1389 15.77      
6 A' 1406 1357 99.77      
7 A' 1333 1286 9.21      
8 A' 1220 1177 206.57      
9 A' 987 952 42.82      
10 A' 878 847 3.07      
11 A' 586 566 42.92      
12 A' 418 403 3.80      
13 A" 3149 3038 2.56      
14 A" 1444 1394 9.72      
15 A" 1051 1014 10.11      
16 A" 684 660 93.37      
17 A" 548 528 20.69      
18 A" 72 70 0.71      

Unscaled Zero Point Vibrational Energy (zpe) 13539.8 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 13065.9 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 B3PW91/cc-pVDZ
ABC
0.37870 0.31572 0.17792

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.055 -0.915 0.000
C2 0.000 0.154 0.000
O3 0.195 1.346 0.000
H4 2.048 -0.454 0.000
H5 0.935 -1.558 0.885
H6 0.935 -1.558 -0.885
O7 -1.244 -0.377 0.000
H8 -1.850 0.385 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50202.41941.09531.10031.10032.36103.1825
C21.50201.20772.13612.14232.14231.35261.8644
O32.41941.20772.58333.12493.12492.24452.2589
H41.09532.13612.58331.80001.80003.29283.9871
H51.10032.14233.12491.80001.77062.63243.5098
H61.10032.14233.12491.80001.77062.63243.5098
O72.36101.35262.24453.29282.63242.63240.9736
H83.18251.86442.25893.98713.50983.50980.9736

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 126.130 C1 C2 O7 111.491
C2 C1 H4 109.669 C2 C1 H5 109.861
C2 C1 H6 109.861 C2 O7 H8 105.374
O3 C2 O7 122.379 H4 C1 H5 110.138
H4 C1 H6 110.138 H5 C1 H6 107.141
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.063      
2 C 0.115      
3 O -0.252      
4 H 0.070      
5 H 0.078      
6 H 0.078      
7 O -0.187      
8 H 0.161      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.429 -1.553 0.000 1.611
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.865 -3.557 0.000
y -3.557 -26.371 0.000
z 0.000 0.000 -22.624
Traceless
 xyz
x 4.632 -3.557 0.000
y -3.557 -5.126 0.000
z 0.000 0.000 0.494
Polar
3z2-r20.988
x2-y26.505
xy-3.557
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> 70.635
(<r2>)1/2 8.404