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

using model chemistry: B3LYP/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 B3LYP/3-21G
 hartrees
Energy at 0K-227.812190
Energy at 298.15K-227.817011
Nuclear repulsion energy119.534186
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 B3LYP/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3471 3349 9.94      
2 A' 3186 3075 4.97      
3 A' 3079 2971 0.76      
4 A' 1797 1734 189.16      
5 A' 1531 1478 21.15      
6 A' 1446 1395 39.55      
7 A' 1374 1326 27.37      
8 A' 1177 1136 175.09      
9 A' 997 962 108.09      
10 A' 837 808 1.92      
11 A' 563 543 42.54      
12 A' 405 391 3.85      
13 A" 3134 3024 3.46      
14 A" 1543 1489 11.31      
15 A" 1106 1067 11.08      
16 A" 674 651 125.47      
17 A" 553 533 29.94      
18 A" 91 88 1.25      

Unscaled Zero Point Vibrational Energy (zpe) 13482.3 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 13009.1 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 B3LYP/3-21G
ABC
0.36430 0.31202 0.17351

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.144 -0.816 0.000
C2 0.000 0.168 0.000
O3 0.057 1.390 0.000
H4 2.090 -0.276 0.000
H5 1.074 -1.459 0.883
H6 1.074 -1.459 -0.883
O7 -1.202 -0.522 0.000
H8 -1.942 0.147 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50912.45951.08921.09431.09432.36473.2334
C21.50911.22352.13612.14002.14001.38621.9426
O32.45951.22352.62763.15113.15112.28972.3545
H41.08922.13612.62761.79201.79203.30114.0541
H51.09432.14003.15111.79201.76602.61513.5296
H61.09432.14003.15111.79201.76602.61513.5296
O72.36471.38622.28973.30112.61512.61510.9979
H83.23341.94262.35454.05413.52963.52960.9979

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 128.018 C1 C2 O7 109.446
C2 C1 H4 109.528 C2 C1 H5 109.536
C2 C1 H6 109.536 C2 O7 H8 108.026
O3 C2 O7 122.536 H4 C1 H5 110.310
H4 C1 H6 110.310 H5 C1 H6 107.594
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.627     -0.593
2 C 0.596     0.785
3 O -0.473     -0.515
4 H 0.226     0.160
5 H 0.235     0.181
6 H 0.235     0.181
7 O -0.551     -0.622
8 H 0.359     0.423


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.291 -1.363 0.000 1.394
CHELPG        
AIM        
ESP -0.284 -1.365 0.000 1.395


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.001 -3.121 0.000
y -3.121 -27.583 0.000
z 0.000 0.000 -22.676
Traceless
 xyz
x 6.128 -3.121 0.000
y -3.121 -6.744 0.000
z 0.000 0.000 0.616
Polar
3z2-r21.232
x2-y28.581
xy-3.121
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.200 -0.125 0.000
y -0.125 4.148 0.000
z 0.000 0.000 2.293


<r2> (average value of r2) Å2
<r2> 72.029
(<r2>)1/2 8.487