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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G**
 hartrees
Energy at 0K-153.649010
Energy at 298.15K-153.652925
HF Energy-153.649010
Nuclear repulsion energy69.697387
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 PBE1PBE/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' 3198 3048 7.07 51.27 0.72 0.84
2 A' 3069 2925 1.61 123.16 0.01 0.03
3 A' 2932 2795 131.71 124.87 0.34 0.51
4 A' 1877 1789 163.14 7.42 0.53 0.70
5 A' 1486 1416 19.09 23.09 0.69 0.81
6 A' 1448 1380 13.91 7.83 0.63 0.77
7 A' 1400 1334 24.60 5.82 0.75 0.86
8 A' 1144 1091 25.10 3.09 0.45 0.62
9 A' 908 865 6.64 5.57 0.40 0.57
10 A' 509 485 13.17 1.08 0.49 0.65
11 A" 3138 2991 5.56 70.00 0.75 0.86
12 A" 1495 1425 11.48 14.62 0.75 0.86
13 A" 1147 1093 1.68 1.00 0.75 0.86
14 A" 778 742 1.27 7.57 0.75 0.86
15 A" 155 147 0.26 1.08 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12341.2 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 11762.4 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 PBE1PBE/6-31G**
ABC
1.90276 0.33895 0.30390

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.932 -0.714 0.000
O3 1.204 0.382 0.000
H4 -0.500 1.457 0.000
H5 -0.367 -1.649 0.000
H6 -1.586 -0.671 0.880
H7 -1.586 -0.671 -0.880

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50081.20691.11342.14182.13892.1389
C21.50082.40152.21381.09201.09731.0973
O31.20692.40152.01462.56723.10993.1099
H41.11342.21382.01463.10812.54642.5464
H52.14181.09202.56723.10811.79351.7935
H62.13891.09733.10992.54641.79351.7601
H72.13891.09733.10992.54641.79351.7601

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.400 C1 C2 H6 109.848
C1 C2 H7 109.848 C2 C1 O3 124.614
C2 C1 H4 114.932 O3 C1 H4 120.453
H5 C2 H6 110.015 H5 C2 H7 110.015
H6 C2 H7 106.644
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.246      
2 C -0.609      
3 O -0.377      
4 H 0.127      
5 H 0.211      
6 H 0.201      
7 H 0.201      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.662 -0.301 0.000 2.679
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.440 -0.798 0.000
y -0.798 -17.667 0.000
z 0.000 0.000 -17.580
Traceless
 xyz
x -2.817 -0.798 0.000
y -0.798 1.343 0.000
z 0.000 0.000 1.474
Polar
3z2-r22.948
x2-y2-2.773
xy-0.798
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.357 0.111 0.000
y 0.111 3.610 0.000
z 0.000 0.000 2.564


<r2> (average value of r2) Å2
<r2> 46.627
(<r2>)1/2 6.828