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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: BLYP/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 BLYP/6-31+G**
 hartrees
Energy at 0K-153.791351
Energy at 298.15K-153.795189
HF Energy-153.791351
Nuclear repulsion energy68.870047
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 BLYP/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' 3073 3057 10.74 52.20 0.69 0.82
2 A' 2953 2937 3.37 174.54 0.01 0.02
3 A' 2792 2777 143.89 180.78 0.35 0.52
4 A' 1728 1719 188.86 12.07 0.54 0.70
5 A' 1426 1419 24.43 13.84 0.63 0.77
6 A' 1381 1373 10.07 5.25 0.51 0.68
7 A' 1339 1332 26.28 5.52 0.72 0.84
8 A' 1092 1086 25.60 2.67 0.30 0.46
9 A' 855 851 11.88 7.02 0.49 0.66
10 A' 493 490 10.98 1.50 0.44 0.61
11 A" 3007 2991 7.97 73.23 0.75 0.86
12 A" 1436 1428 12.80 7.15 0.75 0.86
13 A" 1091 1086 0.10 1.43 0.75 0.86
14 A" 749 745 1.19 5.86 0.75 0.86
15 A" 144 144 0.64 1.70 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11779.3 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 11716.9 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 BLYP/6-31+G**
ABC
1.86808 0.33038 0.29633

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.465 0.000
C2 -0.948 -0.719 0.000
O3 1.223 0.381 0.000
H4 -0.494 1.473 0.000
H5 -0.394 -1.668 0.000
H6 -1.607 -0.664 0.885
H7 -1.607 -0.664 -0.885

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51621.22631.12242.16922.15382.1538
C21.51622.43372.23791.09901.10511.1051
O31.22632.43372.03502.61083.14403.1440
H41.12242.23792.03503.14252.56632.5663
H52.16921.09902.61083.14251.80641.8064
H62.15381.10513.14402.56631.80641.7708
H72.15381.10513.14402.56631.80641.7708

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 111.082 C1 C2 H6 109.501
C1 C2 H7 109.501 C2 C1 O3 124.766
C2 C1 H4 115.206 O3 C1 H4 120.028
H5 C2 H6 110.079 H5 C2 H7 110.079
H6 C2 H7 106.488
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.214      
2 C -0.487      
3 O -0.349      
4 H 0.103      
5 H 0.180      
6 H 0.169      
7 H 0.169      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.890 -0.330 0.000 2.908
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.691 -0.760 0.000
y -0.760 -18.378 0.000
z 0.000 0.000 -18.295
Traceless
 xyz
x -3.355 -0.760 0.000
y -0.760 1.616 0.000
z 0.000 0.000 1.739
Polar
3z2-r23.479
x2-y2-3.314
xy-0.760
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.537 0.234 0.000
y 0.234 4.508 0.000
z 0.000 0.000 3.235


<r2> (average value of r2) Å2
<r2> 48.033
(<r2>)1/2 6.931