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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B3PW91/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/Def2TZVPP
 hartrees
Energy at 0K-153.836278
Energy at 298.15K-153.840192
HF Energy-153.836278
Nuclear repulsion energy69.918061
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 B3PW91/Def2TZVPP
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' 3156 3156 8.01 47.22 0.70 0.82
2 A' 3034 3034 1.61 170.21 0.01 0.02
3 A' 2878 2878 122.75 154.77 0.31 0.47
4 A' 1827 1827 187.79 10.40 0.59 0.74
5 A' 1452 1452 21.87 12.34 0.58 0.74
6 A' 1422 1422 10.63 4.57 0.43 0.61
7 A' 1369 1369 27.65 3.42 0.74 0.85
8 A' 1129 1129 25.64 2.29 0.21 0.35
9 A' 891 891 8.90 5.40 0.34 0.51
10 A' 508 508 13.22 1.33 0.45 0.62
11 A" 3096 3096 5.08 61.47 0.75 0.86
12 A" 1461 1461 10.38 6.28 0.75 0.86
13 A" 1133 1133 0.29 1.09 0.75 0.86
14 A" 770 770 1.37 4.18 0.75 0.86
15 A" 160 160 0.78 0.96 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12142.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12142.9 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 B3PW91/Def2TZVPP
ABC
1.91705 0.34084 0.30564

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.459 0.000
C2 -0.928 -0.716 0.000
O3 1.200 0.384 0.000
H4 -0.497 1.453 0.000
H5 -0.371 -1.651 0.000
H6 -1.581 -0.666 0.876
H7 -1.581 -0.666 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49681.20201.11162.14182.12862.1286
C21.49682.39482.21141.08821.09391.0939
O31.20202.39482.00542.57023.09833.0983
H41.11162.21142.00543.10642.53642.5364
H52.14181.08822.57023.10641.78911.7891
H62.12861.09393.09832.53641.78911.7530
H72.12861.09393.09832.53641.78911.7530

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.913 C1 C2 H6 109.515
C1 C2 H7 109.515 C2 C1 O3 124.730
C2 C1 H4 115.152 O3 C1 H4 120.118
H5 C2 H6 110.149 H5 C2 H7 110.149
H6 C2 H7 106.496
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.125      
2 C -0.179      
3 O -0.266      
4 H 0.045      
5 H 0.098      
6 H 0.089      
7 H 0.089      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.786 -0.345 0.000 2.807
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.938 -0.769 0.000
y -0.769 -17.827 0.000
z 0.000 0.000 -17.802
Traceless
 xyz
x -3.124 -0.769 0.000
y -0.769 1.543 0.000
z 0.000 0.000 1.581
Polar
3z2-r23.161
x2-y2-3.112
xy-0.769
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.063 0.181 0.000
y 0.181 4.288 0.000
z 0.000 0.000 3.247


<r2> (average value of r2) Å2
<r2> 46.610
(<r2>)1/2 6.827