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

using model chemistry: B1B95/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-229.005242
Energy at 298.15K-229.010064
Nuclear repulsion energy121.344126
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 B1B95/6-31G**
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' 3800 3628 51.74      
2 A' 3216 3070 3.98      
3 A' 3088 2949 1.13      
4 A' 1885 1800 297.12      
5 A' 1476 1410 13.54      
6 A' 1426 1362 101.93      
7 A' 1355 1294 19.15      
8 A' 1224 1168 204.46      
9 A' 1000 955 43.43      
10 A' 881 841 3.03      
11 A' 583 556 45.91      
12 A' 416 397 4.46      
13 A" 3165 3022 3.35      
14 A" 1482 1415 9.29      
15 A" 1064 1015 10.51      
16 A" 689 658 109.19      
17 A" 545 520 19.74      
18 A" 80 76 0.63      

Unscaled Zero Point Vibrational Energy (zpe) 13686.2 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 13067.6 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 B1B95/6-31G**
ABC
0.37988 0.31731 0.17860

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.052 -0.915 0.000
C2 0.000 0.154 0.000
O3 0.196 1.344 0.000
H4 2.036 -0.455 0.000
H5 0.934 -1.551 0.879
H6 0.934 -1.551 -0.879
O7 -1.242 -0.376 0.000
H8 -1.849 0.379 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.49922.41591.08691.09171.09172.35573.1759
C21.49921.20672.12542.13352.13351.34981.8625
O32.41591.20672.57403.11473.11472.24172.2610
H41.08692.12542.57401.78581.78583.27893.9737
H51.09172.13353.11471.78581.75882.62463.4991
H61.09172.13353.11471.78581.75882.62463.4991
O72.35571.34982.24173.27892.62462.62460.9688
H83.17591.86252.26103.97373.49913.49910.9688

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 126.119 C1 C2 O7 111.446
C2 C1 H4 109.514 C2 C1 H5 109.869
C2 C1 H6 109.869 C2 O7 H8 105.718
O3 C2 O7 122.434 H4 C1 H5 110.118
H4 C1 H6 110.118 H5 C1 H6 107.326
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.426      
2 C 0.543      
3 O -0.455      
4 H 0.162      
5 H 0.162      
6 H 0.162      
7 O -0.481      
8 H 0.333      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.421 -1.557 0.000 1.612
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.675 -3.723 0.000
y -3.723 -26.414 0.000
z 0.000 0.000 -22.580
Traceless
 xyz
x 4.823 -3.723 0.000
y -3.723 -5.287 0.000
z 0.000 0.000 0.464
Polar
3z2-r20.928
x2-y26.740
xy-3.723
xz0.000
yz0.000


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