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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: HSEh1PBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HSEh1PBE/6-311G*
 hartrees
Energy at 0K-153.699510
Energy at 298.15K-153.703430
HF Energy-153.699510
Nuclear repulsion energy69.897079
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 HSEh1PBE/6-311G*
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' 3171 3043 12.27 52.80 0.72 0.84
2 A' 3049 2926 2.57 140.18 0.01 0.02
3 A' 2898 2781 149.64 157.41 0.34 0.51
4 A' 1860 1785 186.34 8.89 0.70 0.82
5 A' 1474 1415 25.60 17.39 0.65 0.78
6 A' 1439 1381 14.04 6.56 0.59 0.74
7 A' 1385 1329 31.02 4.37 0.70 0.82
8 A' 1140 1094 25.07 1.97 0.35 0.52
9 A' 899 863 6.76 5.14 0.43 0.61
10 A' 510 490 13.48 1.40 0.49 0.66
11 A" 3113 2987 9.41 69.86 0.75 0.86
12 A" 1481 1422 13.72 10.04 0.75 0.86
13 A" 1141 1095 0.95 1.30 0.75 0.86
14 A" 775 743 1.17 5.99 0.75 0.86
15 A" 159 152 0.37 1.10 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12247.4 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 11752.6 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 HSEh1PBE/6-311G*
ABC
1.91760 0.34042 0.30537

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.459 0.000
C2 -0.927 -0.718 0.000
O3 1.198 0.388 0.000
H4 -0.501 1.454 0.000
H5 -0.362 -1.649 0.000
H6 -1.581 -0.678 0.878
H7 -1.581 -0.678 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49831.20051.11352.13962.13632.1363
C21.49832.39562.21321.08991.09541.0954
O31.20052.39562.00592.56573.10343.1034
H41.11352.21322.00593.10662.54632.5463
H52.13961.08992.56573.10661.78921.7892
H62.13631.09543.10342.54631.78921.7555
H72.13631.09543.10342.54631.78921.7555

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.525 C1 C2 H6 109.938
C1 C2 H7 109.938 C2 C1 O3 124.793
C2 C1 H4 115.064 O3 C1 H4 120.143
H5 C2 H6 109.922 H5 C2 H7 109.922
H6 C2 H7 106.516
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.121      
2 C -0.735      
3 O -0.280      
4 H 0.155      
5 H 0.250      
6 H 0.245      
7 H 0.245      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.670 -0.290 0.000 2.686
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.778 -0.864 0.000
y -0.864 -17.944 0.000
z 0.000 0.000 -17.813
Traceless
 xyz
x -2.900 -0.864 0.000
y -0.864 1.352 0.000
z 0.000 0.000 1.548
Polar
3z2-r23.096
x2-y2-2.834
xy-0.864
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.581 0.118 0.000
y 0.118 3.887 0.000
z 0.000 0.000 2.764


<r2> (average value of r2) Å2
<r2> 46.649
(<r2>)1/2 6.830