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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: PBEPBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-153.655057
Energy at 298.15K-153.658892
HF Energy-153.655057
Nuclear repulsion energy69.085380
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 PBEPBE/6-31+G**
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' 3101 3065 7.07 50.90 0.72 0.84
2 A' 2972 2938 1.79 175.48 0.01 0.02
3 A' 2808 2776 139.28 179.51 0.34 0.51
4 A' 1757 1737 189.69 12.28 0.52 0.69
5 A' 1412 1396 24.63 14.44 0.63 0.77
6 A' 1374 1359 11.75 4.41 0.52 0.69
7 A' 1325 1309 33.96 5.42 0.72 0.84
8 A' 1094 1082 25.41 2.61 0.31 0.47
9 A' 866 856 9.41 6.17 0.52 0.69
10 A' 492 487 10.84 1.36 0.43 0.60
11 A" 3040 3005 3.95 71.11 0.75 0.86
12 A" 1422 1405 14.68 7.14 0.75 0.86
13 A" 1086 1073 0.15 1.62 0.75 0.86
14 A" 742 733 1.89 5.80 0.75 0.86
15 A" 144 143 0.45 1.68 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11817.3 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 11682.6 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 PBEPBE/6-31+G**
ABC
1.87362 0.33331 0.29880

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.944 -0.713 0.000
O3 1.220 0.376 0.000
H4 -0.493 1.472 0.000
H5 -0.391 -1.663 0.000
H6 -1.604 -0.656 0.885
H7 -1.604 -0.656 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50731.22291.12362.16092.14632.1463
C21.50732.42252.23071.09951.10511.1051
O31.22292.42252.03352.59863.13403.1340
H41.12362.23072.03353.13652.55852.5585
H52.16091.09952.59863.13651.80751.8075
H62.14631.10513.13402.55851.80751.7698
H72.14631.10513.13402.55851.80751.7698

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 111.015 C1 C2 H6 109.517
C1 C2 H7 109.517 C2 C1 O3 124.741
C2 C1 H4 115.182 O3 C1 H4 120.077
H5 C2 H6 110.144 H5 C2 H7 110.144
H6 C2 H7 106.394
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.198      
2 C -0.579      
3 O -0.333      
4 H 0.122      
5 H 0.203      
6 H 0.194      
7 H 0.194      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.869 -0.341 0.000 2.890
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.399 -0.733 0.000
y -0.733 -18.209 0.000
z 0.000 0.000 -18.176
Traceless
 xyz
x -3.207 -0.733 0.000
y -0.733 1.579 0.000
z 0.000 0.000 1.628
Polar
3z2-r23.255
x2-y2-3.190
xy-0.733
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.489 0.224 0.000
y 0.224 4.470 0.000
z 0.000 0.000 3.201


<r2> (average value of r2) Å2
<r2> 47.644
(<r2>)1/2 6.902