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

using model chemistry: BLYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/6-31+G**
 hartrees
Energy at 0K-229.045516
Energy at 298.15K-229.050197
Nuclear repulsion energy119.432734
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 BLYP/6-31+G**
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' 3597 3578 38.30      
2 A' 3100 3084 5.22      
3 A' 2987 2971 3.02      
4 A' 1736 1727 320.75      
5 A' 1440 1432 17.98      
6 A' 1365 1358 33.40      
7 A' 1282 1275 38.25      
8 A' 1152 1146 196.98      
9 A' 961 956 89.39      
10 A' 820 816 5.90      
11 A' 556 553 33.17      
12 A' 409 407 4.81      
13 A" 3046 3030 4.75      
14 A" 1446 1438 11.05      
15 A" 1032 1026 5.43      
16 A" 650 646 100.19      
17 A" 528 525 21.78      
18 A" 57 57 0.40      

Unscaled Zero Point Vibrational Energy (zpe) 13081.4 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 13012.1 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 BLYP/6-31+G**
ABC
0.36681 0.30815 0.17292

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.097 -0.892 0.000
C2 0.000 0.156 0.000
O3 0.157 1.371 0.000
H4 2.076 -0.398 0.000
H5 1.001 -1.538 0.887
H6 1.001 -1.538 -0.887
O7 -1.252 -0.424 0.000
H8 -1.900 0.315 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.51722.45091.09631.10161.10162.39503.2312
C21.51721.22542.14892.15842.15841.37981.9067
O32.45091.22542.61093.15663.15662.28222.3119
H41.09632.14892.61091.80031.80033.32804.0397
H51.10162.15843.15661.80031.77422.66503.5550
H61.10162.15843.15661.80031.77422.66503.5550
O72.39501.37982.28223.32802.66502.66500.9836
H83.23121.90672.31194.03973.55503.55500.9836

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 126.342 C1 C2 O7 111.440
C2 C1 H4 109.563 C2 C1 H5 109.999
C2 C1 H6 109.999 C2 O7 H8 106.351
O3 C2 O7 122.218 H4 C1 H5 109.991
H4 C1 H6 109.991 H5 C1 H6 107.272
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.450      
2 C 0.393      
3 O -0.431      
4 H 0.179      
5 H 0.180      
6 H 0.180      
7 O -0.401      
8 H 0.350      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.196 -1.720 0.000 1.732
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.516 -3.775 0.000
y -3.775 -28.254 0.000
z 0.000 0.000 -23.739
Traceless
 xyz
x 5.481 -3.775 0.000
y -3.775 -6.127 0.000
z 0.000 0.000 0.646
Polar
3z2-r21.292
x2-y27.739
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> 72.943
(<r2>)1/2 8.541