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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-152.951602
Energy at 298.15K-152.955619
HF Energy-152.951602
Nuclear repulsion energy70.443331
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' 3292 2978 23.64 53.10 0.71 0.83
2 A' 3184 2880 9.23 144.95 0.01 0.03
3 A' 3113 2815 130.56 120.48 0.42 0.59
4 A' 2017 1825 246.94 10.56 0.67 0.80
5 A' 1597 1444 20.83 15.05 0.70 0.83
6 A' 1559 1410 20.62 5.73 0.45 0.62
7 A' 1520 1375 10.70 2.93 0.62 0.77
8 A' 1227 1110 27.66 2.86 0.38 0.55
9 A' 955 863 4.61 7.06 0.31 0.47
10 A' 546 494 19.97 1.21 0.48 0.65
11 A" 3236 2927 25.09 71.36 0.75 0.86
12 A" 1605 1451 10.13 10.19 0.75 0.86
13 A" 1258 1137 0.99 0.89 0.75 0.86
14 A" 850 768 0.03 5.66 0.75 0.86
15 A" 158 143 1.93 0.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 13058.0 cm-1
Scaled (by 0.9044) Zero Point Vibrational Energy (zpe) 11809.6 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
1.94646 0.34409 0.30890

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 -0.732 0.000
O3 1.180 0.404 0.000
H4 -0.502 1.438 0.000
H5 -0.339 -1.647 0.000
H6 -1.558 -0.702 0.874
H7 -1.558 -0.702 -0.874

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50371.18171.09752.13632.13262.1326
C21.50372.38242.20881.08111.08611.0861
O31.18172.38241.97472.55223.08013.0801
H41.09752.20881.97473.08962.54202.5420
H52.13631.08112.55223.08961.77301.7730
H62.13261.08613.08012.54201.77301.7479
H72.13261.08613.08012.54201.77301.7479

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.415 C1 C2 H6 109.818
C1 C2 H7 109.818 C2 C1 O3 124.608
C2 C1 H4 115.352 O3 C1 H4 120.040
H5 C2 H6 109.792 H5 C2 H7 109.792
H6 C2 H7 107.146
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.222      
2 C -0.703      
3 O -0.377      
4 H 0.158      
5 H 0.243      
6 H 0.228      
7 H 0.228      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.956 -0.237 0.000 2.965
CHELPG        
AIM        
ESP -2.958 -0.238 0.000 2.968


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.351 -1.129 0.000
y -1.129 -17.875 0.000
z 0.000 0.000 -17.829
Traceless
 xyz
x -3.499 -1.129 0.000
y -1.129 1.715 0.000
z 0.000 0.000 1.784
Polar
3z2-r23.568
x2-y2-3.476
xy-1.129
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.265 0.053 0.000
y 0.053 3.476 0.000
z 0.000 0.000 2.637


<r2> (average value of r2) Å2
<r2> 46.353
(<r2>)1/2 6.808