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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: BLYP/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 BLYP/6-31G*
 hartrees
Energy at 0K-153.774033
Energy at 298.15K-153.777886
HF Energy-153.774033
Nuclear repulsion energy68.881744
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 BLYP/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' 3079 3055 13.03 53.84 0.69 0.81
2 A' 2961 2937 3.12 126.37 0.02 0.03
3 A' 2778 2756 158.49 134.40 0.35 0.52
4 A' 1760 1746 140.77 6.20 0.52 0.69
5 A' 1453 1441 16.41 24.74 0.68 0.81
6 A' 1404 1393 10.07 10.44 0.67 0.81
7 A' 1360 1349 17.75 8.92 0.71 0.83
8 A' 1101 1092 23.63 3.64 0.50 0.67
9 A' 859 852 10.79 5.89 0.41 0.58
10 A' 492 488 10.72 1.26 0.52 0.69
11 A" 3011 2987 10.84 73.79 0.75 0.86
12 A" 1462 1450 8.21 16.08 0.75 0.86
13 A" 1105 1096 1.31 1.08 0.75 0.86
14 A" 754 748 0.70 8.49 0.75 0.86
15 A" 154 153 0.08 1.27 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11865.4 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 11769.3 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 BLYP/6-31G*
ABC
1.86941 0.33021 0.29624

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.466 0.000
C2 -0.944 -0.724 0.000
O3 1.220 0.389 0.000
H4 -0.512 1.467 0.000
H5 -0.379 -1.668 0.000
H6 -1.604 -0.679 0.886
H7 -1.604 -0.679 -0.886

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51911.22281.12482.16712.16072.1607
C21.51912.43392.23411.09971.10591.1059
O31.22282.43392.04032.60553.14713.1471
H41.12482.23412.04033.13822.56622.5662
H52.16711.09972.60553.13821.80681.8068
H62.16071.10593.14712.56621.80681.7717
H72.16071.10593.14712.56621.80681.7717

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.671 C1 C2 H6 109.801
C1 C2 H7 109.801 C2 C1 O3 124.815
C2 C1 H4 114.530 O3 C1 H4 120.655
H5 C2 H6 110.010 H5 C2 H7 110.010
H6 C2 H7 106.459
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.249      
2 C -0.467      
3 O -0.348      
4 H 0.083      
5 H 0.165      
6 H 0.159      
7 H 0.159      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.497 -0.347 0.000 2.521
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.441 -0.683 0.000
y -0.683 -17.924 0.000
z 0.000 0.000 -17.663
Traceless
 xyz
x -2.648 -0.683 0.000
y -0.683 1.128 0.000
z 0.000 0.000 1.520
Polar
3z2-r23.040
x2-y2-2.517
xy-0.683
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.526 0.150 0.000
y 0.150 3.807 0.000
z 0.000 0.000 2.613


<r2> (average value of r2) Å2
<r2> 47.566
(<r2>)1/2 6.897