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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: HF/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/6-311G**
 hartrees
Energy at 0K-152.957916
Energy at 298.15K-152.961944
HF Energy-152.957916
Nuclear repulsion energy70.441437
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 HF/6-311G**
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' 3277 2977 18.84 52.10 0.71 0.83
2 A' 3166 2876 6.80 150.64 0.01 0.02
3 A' 3085 2803 120.05 122.21 0.39 0.56
4 A' 2013 1829 246.51 10.83 0.67 0.80
5 A' 1578 1434 20.04 13.65 0.69 0.82
6 A' 1547 1405 19.08 4.78 0.40 0.57
7 A' 1505 1367 11.55 2.99 0.67 0.80
8 A' 1221 1109 28.26 2.84 0.33 0.49
9 A' 952 865 4.94 6.94 0.29 0.45
10 A' 547 497 20.36 1.28 0.49 0.65
11 A" 3222 2927 20.68 69.04 0.75 0.86
12 A" 1590 1445 10.13 8.89 0.75 0.86
13 A" 1253 1138 0.82 0.91 0.75 0.86
14 A" 849 771 0.05 4.99 0.75 0.86
15 A" 162 148 1.91 0.89 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12983.6 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 11795.6 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 HF/6-311G**
ABC
1.94110 0.34449 0.30915

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.914 -0.731 0.000
O3 1.180 0.402 0.000
H4 -0.504 1.438 0.000
H5 -0.338 -1.647 0.000
H6 -1.557 -0.696 0.876
H7 -1.557 -0.696 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50341.18191.09862.13592.12922.1292
C21.50342.38162.20771.08191.08701.0870
O31.18192.38161.97782.55013.07693.0769
H41.09862.20771.97783.08942.53572.5357
H52.13591.08192.55013.08941.77711.7771
H62.12921.08703.07692.53571.77711.7512
H72.12921.08703.07692.53571.77711.7512

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.355 C1 C2 H6 109.516
C1 C2 H7 109.516 C2 C1 O3 124.540
C2 C1 H4 115.209 O3 C1 H4 120.251
H5 C2 H6 110.037 H5 C2 H7 110.037
H6 C2 H7 107.326
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.260      
2 C -0.289      
3 O -0.372      
4 H 0.057      
5 H 0.124      
6 H 0.110      
7 H 0.110      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.968 -0.244 0.000 2.978
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.307 -1.108 0.000
y -1.108 -17.808 0.000
z 0.000 0.000 -17.782
Traceless
 xyz
x -3.512 -1.108 0.000
y -1.108 1.736 0.000
z 0.000 0.000 1.776
Polar
3z2-r23.551
x2-y2-3.498
xy-1.108
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.315 0.067 0.000
y 0.067 3.539 0.000
z 0.000 0.000 2.697


<r2> (average value of r2) Å2
<r2> 46.292
(<r2>)1/2 6.804