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

using model chemistry: B3LYP/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 B3LYP/6-31+G**
 hartrees
Energy at 0K-229.105827
Energy at 298.15K-229.110619
Nuclear repulsion energy120.693053
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/6-31+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' 3756 3621 60.60      
2 A' 3181 3068 4.22      
3 A' 3064 2954 2.07      
4 A' 1822 1757 358.78      
5 A' 1476 1423 16.55      
6 A' 1413 1363 58.13      
7 A' 1336 1288 50.97      
8 A' 1206 1163 211.17      
9 A' 1002 966 67.65      
10 A' 863 832 3.40      
11 A' 581 560 40.22      
12 A' 422 407 4.77      
13 A" 3129 3017 3.69      
14 A" 1482 1429 11.14      
15 A" 1067 1029 7.50      
16 A" 668 644 108.04      
17 A" 545 526 26.45      
18 A" 68 66 0.34      

Unscaled Zero Point Vibrational Energy (zpe) 13541.1 cm-1
Scaled (by 0.9642) Zero Point Vibrational Energy (zpe) 13056.3 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/6-31+G**
ABC
0.37617 0.31347 0.17660

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.070 -0.906 0.000
C2 0.000 0.153 0.000
O3 0.182 1.352 0.000
H4 2.051 -0.434 0.000
H5 0.961 -1.545 0.882
H6 0.961 -1.545 -0.882
O7 -1.246 -0.390 0.000
H8 -1.879 0.348 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 O7 H8
C11.50572.42691.08931.09431.09432.37283.2048
C21.50571.21282.13362.14122.14121.35911.8891
O32.42691.21282.58543.12723.12722.25232.2922
H41.08932.13362.58541.78951.78953.29764.0074
H51.09432.14123.12721.78951.76342.64243.5253
H61.09432.14123.12721.78951.76342.64243.5253
O72.37281.35912.25233.29762.64242.64240.9724
H83.20481.88912.29224.00743.52533.52530.9724

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 126.098 C1 C2 O7 111.740
C2 C1 H4 109.562 C2 C1 H5 109.871
C2 C1 H6 109.871 C2 O7 H8 107.074
O3 C2 O7 122.162 H4 C1 H5 110.074
H4 C1 H6 110.074 H5 C1 H6 107.361
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.448     -0.399
2 C 0.433     0.794
3 O -0.462     -0.579
4 H 0.183     0.116
5 H 0.183     0.135
6 H 0.183     0.135
7 O -0.435     -0.629
8 H 0.363     0.428


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.280 -1.771 0.000 1.793
CHELPG        
AIM        
ESP -0.272 -1.785 0.000 1.806


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.353 -3.973 0.000
y -3.973 -27.950 0.000
z 0.000 0.000 -23.464
Traceless
 xyz
x 5.354 -3.973 0.000
y -3.973 -6.042 0.000
z 0.000 0.000 0.688
Polar
3z2-r21.376
x2-y27.597
xy-3.973
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.114 -0.037 0.000
y -0.037 5.479 0.000
z 0.000 0.000 3.505


<r2> (average value of r2) Å2
<r2> 71.631
(<r2>)1/2 8.463