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

using model chemistry: B3LYP/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 B3LYP/6-31G*
 hartrees
Energy at 0K-229.081786
Energy at 298.15K-229.086604
Nuclear repulsion energy120.734209
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/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' 3685 3539 40.70      
2 A' 3187 3061 6.17      
3 A' 3073 2951 2.04      
4 A' 1857 1783 286.43      
5 A' 1501 1441 13.82      
6 A' 1433 1376 55.30      
7 A' 1365 1311 25.60      
8 A' 1228 1179 214.76      
9 A' 1010 970 59.54      
10 A' 867 832 2.66      
11 A' 582 559 42.37      
12 A' 420 403 4.33      
13 A" 3135 3011 5.55      
14 A" 1505 1445 8.58      
15 A" 1080 1037 9.18      
16 A" 691 664 111.53      
17 A" 546 525 18.13      
18 A" 79 76 0.60      

Unscaled Zero Point Vibrational Energy (zpe) 13622.3 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 13081.5 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 B3LYP/6-31G*
ABC
0.37613 0.31385 0.17671

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.060 -0.917 0.000
C2 0.000 0.156 0.000
O3 0.193 1.351 0.000
H4 2.047 -0.453 0.000
H5 0.947 -1.555 0.882
H6 0.947 -1.555 -0.882
O7 -1.248 -0.382 0.000
H8 -1.863 0.376 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50822.42771.09011.09501.09502.36903.1964
C21.50821.21032.13532.14552.14551.35841.8761
O32.42771.21032.58643.12923.12922.25302.2755
H41.09012.13532.58641.78991.78993.29503.9967
H51.09502.14553.12921.78991.76442.64033.5218
H61.09502.14553.12921.78991.76442.64033.5218
O72.36901.35842.25303.29502.64032.64030.9760
H83.19641.87612.27553.99673.52183.52180.9760

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 126.166 C1 C2 O7 111.358
C2 C1 H4 109.476 C2 C1 H5 109.995
C2 C1 H6 109.995 C2 O7 H8 105.801
O3 C2 O7 122.476 H4 C1 H5 110.000
H4 C1 H6 110.000 H5 C1 H6 107.349
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.556 -0.579 -0.018 -0.405
2 H 0.408 0.406 1.613 0.702
3 C 0.556 0.712 -1.215 -0.519
4 C -0.515 -0.322 0.056 0.116
5 H 0.186 0.111 0.053 0.135
6 H 0.186 0.111 0.053 0.135
7 H 0.186 0.091 -1.121 -0.567
8 O -0.451 -0.530 0.579 0.403


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.400 -1.527 0.000 1.578
CHELPG -0.385 -1.562 0.000 1.609
AIM -0.711 1.158 0.000 1.359
ESP -0.386 -1.561 0.000 1.608


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.834 -3.716 0.000
y -3.716 -26.636 0.000
z 0.000 0.000 -22.690
Traceless
 xyz
x 4.828 -3.716 0.000
y -3.716 -5.373 0.000
z 0.000 0.000 0.545
Polar
3z2-r21.090
x2-y26.801
xy-3.716
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.432 -0.118 0.000
y -0.118 4.570 0.000
z 0.000 0.000 2.769


<r2> (average value of r2) Å2
<r2> 71.035
(<r2>)1/2 8.428