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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-153.639773
Energy at 298.15K-153.643622
HF Energy-153.639773
Nuclear repulsion energy69.082537
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 PBEPBEultrafine/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3106 3055 8.67 53.09 0.71 0.83
2 A' 2979 2930 1.63 127.47 0.01 0.03
3 A' 2797 2751 153.14 135.95 0.34 0.51
4 A' 1787 1757 144.83 6.81 0.51 0.68
5 A' 1440 1416 18.30 24.91 0.68 0.81
6 A' 1398 1375 10.81 9.40 0.67 0.80
7 A' 1346 1323 25.74 8.44 0.72 0.84
8 A' 1103 1084 24.26 3.17 0.45 0.62
9 A' 871 856 8.98 5.70 0.44 0.61
10 A' 492 483 10.65 1.17 0.52 0.68
11 A" 3043 2993 5.90 72.71 0.75 0.86
12 A" 1449 1425 10.52 15.38 0.75 0.86
13 A" 1099 1081 1.53 1.23 0.75 0.86
14 A" 747 735 1.43 8.26 0.75 0.86
15 A" 153 151 0.03 1.25 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11903.9 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 11707.4 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 PBEPBEultrafine/6-31G*
ABC
1.87465 0.33296 0.29857

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.463 0.000
C2 -0.941 -0.718 0.000
O3 1.217 0.383 0.000
H4 -0.509 1.467 0.000
H5 -0.377 -1.662 0.000
H6 -1.602 -0.671 0.885
H7 -1.602 -0.671 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51041.22001.12562.15882.15332.1533
C21.51042.42332.22721.10011.10591.1059
O31.22002.42332.03872.59373.13763.1376
H41.12562.22722.03873.13222.55882.5588
H52.15881.10012.59373.13221.80791.8079
H62.15331.10593.13762.55881.80791.7709
H72.15331.10593.13762.55881.80791.7709

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.599 C1 C2 H6 109.813
C1 C2 H7 109.813 C2 C1 O3 124.792
C2 C1 H4 114.543 O3 C1 H4 120.665
H5 C2 H6 110.072 H5 C2 H7 110.072
H6 C2 H7 106.384
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.226      
2 C -0.558      
3 O -0.343      
4 H 0.106      
5 H 0.194      
6 H 0.188      
7 H 0.188      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.518 -0.353 0.000 2.543
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.286 -0.681 0.000
y -0.681 -17.826 0.000
z 0.000 0.000 -17.633
Traceless
 xyz
x -2.557 -0.681 0.000
y -0.681 1.134 0.000
z 0.000 0.000 1.423
Polar
3z2-r22.845
x2-y2-2.461
xy-0.681
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.533 0.152 0.000
y 0.152 3.811 0.000
z 0.000 0.000 2.618


<r2> (average value of r2) Å2
<r2> 47.253
(<r2>)1/2 6.874