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

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-228.995279
Energy at 298.15K-229.000102
Nuclear repulsion energy121.011226
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 B3PW91/6-31G*
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' 3720 3559 47.18      
2 A' 3204 3065 4.78      
3 A' 3082 2949 1.53      
4 A' 1873 1792 295.19      
5 A' 1495 1430 14.80      
6 A' 1434 1372 79.38      
7 A' 1367 1308 21.99      
8 A' 1233 1179 214.57      
9 A' 1010 966 49.52      
10 A' 878 840 2.86      
11 A' 584 559 43.88      
12 A' 420 402 4.64      
13 A" 3153 3017 3.93      
14 A" 1499 1434 9.99      
15 A" 1076 1029 10.66      
16 A" 696 666 113.00      
17 A" 549 526 19.47      
18 A" 77 74 0.62      

Unscaled Zero Point Vibrational Energy (zpe) 13675.2 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 13083.1 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 B3PW91/6-31G*
ABC
0.37801 0.31545 0.17763

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.054 -0.918 0.000
C2 0.000 0.155 0.000
O3 0.196 1.348 0.000
H4 2.042 -0.458 0.000
H5 0.938 -1.556 0.882
H6 0.938 -1.556 -0.882
O7 -1.245 -0.377 0.000
H8 -1.855 0.382 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50362.42231.09011.09481.09482.36143.1865
C21.50361.20902.13182.14142.14141.35351.8693
O32.42231.20902.58173.12423.12422.24752.2678
H41.09012.13182.58171.78961.78963.28773.9869
H51.09482.14143.12421.78961.76372.63333.5128
H61.09482.14143.12421.78961.76372.63333.5128
O72.36141.35352.24753.28772.63332.63330.9741
H83.18651.86932.26783.98693.51283.51280.9741

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 126.151 C1 C2 O7 111.372
C2 C1 H4 109.525 C2 C1 H5 109.999
C2 C1 H6 109.999 C2 O7 H8 105.702
O3 C2 O7 122.477 H4 C1 H5 109.990
H4 C1 H6 109.990 H5 C1 H6 107.312
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.567     -0.463
2 H 0.422     0.708
3 C 0.565     -0.521
4 C -0.592     0.133
5 H 0.209     0.151
6 H 0.209     0.151
7 H 0.211     -0.568
8 O -0.457     0.408


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.424 -1.541 0.000 1.599
CHELPG        
AIM        
ESP -0.412 -1.578 0.000 1.631


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.679 -3.775 0.000
y -3.775 -26.498 0.000
z 0.000 0.000 -22.625
Traceless
 xyz
x 4.883 -3.775 0.000
y -3.775 -5.346 0.000
z 0.000 0.000 0.463
Polar
3z2-r20.926
x2-y26.819
xy-3.775
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> 70.683
(<r2>)1/2 8.407