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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B3LYP/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/CEP-121G
 hartrees
Energy at 0K-29.630373
Energy at 298.15K-29.634293
HF Energy-29.630373
Nuclear repulsion energy38.725088
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 B3LYP/CEP-121G
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' 3126 3046 20.49 51.95 0.72 0.84
2 A' 2988 2912 6.56 181.07 0.01 0.01
3 A' 2918 2844 126.39 146.43 0.40 0.57
4 A' 1684 1641 137.98 6.32 0.53 0.69
5 A' 1484 1446 32.93 20.26 0.66 0.79
6 A' 1419 1383 24.03 8.92 0.62 0.77
7 A' 1406 1370 15.46 8.27 0.68 0.81
8 A' 1138 1109 25.58 4.52 0.36 0.53
9 A' 899 876 6.23 7.90 0.35 0.52
10 A' 496 483 13.79 2.15 0.53 0.69
11 A" 3062 2984 19.72 74.11 0.75 0.86
12 A" 1492 1454 17.11 13.43 0.75 0.86
13 A" 1134 1105 0.06 0.55 0.75 0.86
14 A" 790 770 2.45 7.80 0.75 0.86
15 A" 155 151 0.71 1.14 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12095.6 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 11787.2 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 B3LYP/CEP-121G
ABC
1.84400 0.32618 0.29230

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.471 0.000
C2 -0.971 -0.699 0.000
O3 1.245 0.352 0.000
H4 -0.457 1.484 0.000
H5 -0.428 -1.648 0.000
H6 -1.623 -0.642 0.884
H7 -1.623 -0.642 -0.884

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.52061.25061.11062.16192.15792.1579
C21.52062.45232.24201.09351.10001.1000
O31.25062.45232.04392.60693.16163.1616
H41.11062.24202.04393.13152.58092.5809
H52.16191.09352.60693.13151.79481.7948
H62.15791.10003.16162.58091.79481.7680
H72.15791.10003.16162.58091.79481.7680

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 109.826
C1 C2 H7 109.826 C2 C1 O3 124.199
C2 C1 H4 116.010 O3 C1 H4 119.792
H5 C2 H6 109.818 H5 C2 H7 109.818
H6 C2 H7 106.959
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.039      
2 C -0.492      
3 O -0.163      
4 H 0.095      
5 H 0.179      
6 H 0.172      
7 H 0.172      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.169 -0.202 0.000 3.176
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.813 -0.806 0.000
y -0.806 -17.874 0.000
z 0.000 0.000 -18.029
Traceless
 xyz
x -3.862 -0.806 0.000
y -0.806 2.048 0.000
z 0.000 0.000 1.814
Polar
3z2-r23.629
x2-y2-3.940
xy-0.806
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.962 0.037 0.000
y 0.037 3.847 0.000
z 0.000 0.000 2.865


<r2> (average value of r2) Å2
<r2> 41.637
(<r2>)1/2 6.453