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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-227.724141
Energy at 298.15K-227.728971
Nuclear repulsion energy120.025427
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 B1B95/3-21G
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' 3522 3370 16.09      
2 A' 3215 3076 3.39      
3 A' 3096 2962 0.27      
4 A' 1818 1740 197.57      
5 A' 1524 1458 21.77      
6 A' 1441 1378 53.71      
7 A' 1382 1322 33.66      
8 A' 1180 1129 188.68      
9 A' 1003 960 91.88      
10 A' 853 816 1.68      
11 A' 564 539 46.13      
12 A' 401 383 4.31      
13 A" 3161 3025 1.90      
14 A" 1535 1469 13.09      
15 A" 1102 1054 13.12      
16 A" 677 648 130.29      
17 A" 555 531 32.69      
18 A" 94 90 1.33      

Unscaled Zero Point Vibrational Energy (zpe) 13561.7 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 12974.5 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 B1B95/3-21G
ABC
0.36750 0.31479 0.17507

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.140 -0.810 0.000
C2 0.000 0.166 0.000
O3 0.052 1.385 0.000
H4 2.083 -0.268 0.000
H5 1.071 -1.451 0.882
H6 1.071 -1.451 -0.882
O7 -1.194 -0.524 0.000
H8 -1.935 0.139 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50082.45021.08751.09261.09262.35173.2181
C21.50081.22082.12802.13042.13041.37851.9347
O32.45021.22082.61903.14043.14042.27972.3452
H41.08752.12802.61901.78991.78993.28714.0384
H51.09262.13043.14041.78991.76332.60113.5126
H61.09262.13043.14041.78991.76332.60113.5126
O72.35171.37852.27973.28712.60112.60110.9940
H83.21811.93472.34524.03843.51263.51260.9940

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 128.093 C1 C2 O7 109.452
C2 C1 H4 109.568 C2 C1 H5 109.460
C2 C1 H6 109.460 C2 O7 H8 108.174
O3 C2 O7 122.455 H4 C1 H5 110.365
H4 C1 H6 110.365 H5 C1 H6 107.591
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.678      
2 C 0.595      
3 O -0.477      
4 H 0.245      
5 H 0.253      
6 H 0.253      
7 O -0.564      
8 H 0.373      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.297 -1.391 0.000 1.423
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -18.798 -3.141 0.000
y -3.141 -27.552 0.000
z 0.000 0.000 -22.629
Traceless
 xyz
x 6.293 -3.141 0.000
y -3.141 -6.838 0.000
z 0.000 0.000 0.546
Polar
3z2-r21.091
x2-y28.754
xy-3.141
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.137 -0.118 0.000
y -0.118 4.135 0.000
z 0.000 0.000 2.293


<r2> (average value of r2) Å2
<r2> 71.470
(<r2>)1/2 8.454