return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: wB97X-D/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 wB97X-D/6-31G
 hartrees
Energy at 0K-153.728335
Energy at 298.15K-153.732263
HF Energy-153.728335
Nuclear repulsion energy69.212879
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 wB97X-D/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' 3195 3195 9.85 50.52 0.73 0.84
2 A' 3062 3062 2.96 135.23 0.01 0.02
3 A' 2993 2993 112.72 122.14 0.38 0.55
4 A' 1782 1782 126.64 5.14 0.55 0.71
5 A' 1512 1512 25.89 25.16 0.71 0.83
6 A' 1461 1461 10.62 10.83 0.64 0.78
7 A' 1447 1447 33.72 6.43 0.74 0.85
8 A' 1167 1167 29.30 3.72 0.48 0.65
9 A' 932 932 6.95 5.77 0.35 0.52
10 A' 519 519 14.59 1.74 0.53 0.69
11 A" 3137 3137 8.19 72.90 0.75 0.86
12 A" 1523 1523 17.88 18.10 0.75 0.86
13 A" 1166 1166 1.07 0.44 0.75 0.86
14 A" 815 815 3.24 7.98 0.75 0.86
15 A" 141 141 0.47 1.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12426.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12426.3 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 wB97X-D/6-31G
ABC
1.88125 0.33477 0.30005

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.465 0.000
C2 -0.955 -0.693 0.000
O3 1.226 0.353 0.000
H4 -0.464 1.466 0.000
H5 -0.408 -1.637 0.000
H6 -1.605 -0.643 0.882
H7 -1.605 -0.643 -0.882

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50021.23121.10392.14072.14002.1400
C21.50022.41862.21411.09131.09651.0965
O31.23122.41862.02372.57473.12793.1279
H41.10392.21412.02373.10372.55512.5551
H52.14071.09132.57473.10371.78831.7883
H62.14001.09653.12792.55511.78831.7634
H72.14001.09653.12792.55511.78831.7634

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.392 C1 C2 H6 110.022
C1 C2 H7 110.022 C2 C1 O3 124.326
C2 C1 H4 115.628 O3 C1 H4 120.046
H5 C2 H6 109.650 H5 C2 H7 109.650
H6 C2 H7 107.043
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.223      
2 C -0.553      
3 O -0.389      
4 H 0.137      
5 H 0.201      
6 H 0.190      
7 H 0.190      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.062 -0.207 0.000 3.069
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.253 -0.807 0.000
y -0.807 -17.565 0.000
z 0.000 0.000 -17.687
Traceless
 xyz
x -3.628 -0.807 0.000
y -0.807 1.905 0.000
z 0.000 0.000 1.723
Polar
3z2-r23.445
x2-y2-3.689
xy-0.807
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.428 0.043 0.000
y 0.043 3.377 0.000
z 0.000 0.000 2.444


<r2> (average value of r2) Å2
<r2> 47.174
(<r2>)1/2 6.868