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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP/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 B2PLYP/6-311G**
 hartrees
Energy at 0K-153.724610
Energy at 298.15K-153.728540
HF Energy-153.563132
Nuclear repulsion energy69.652179
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 B2PLYP/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' 3168 3168 10.85 51.23 0.72 0.84
2 A' 3049 3049 2.82 144.62 0.01 0.02
3 A' 2903 2903 141.36 162.60 0.33 0.49
4 A' 1803 1803 152.50 7.56 0.72 0.84
5 A' 1476 1476 20.86 15.77 0.65 0.79
6 A' 1437 1437 11.99 7.45 0.52 0.68
7 A' 1390 1390 22.73 4.03 0.71 0.83
8 A' 1138 1138 24.51 2.34 0.30 0.46
9 A' 894 894 7.87 5.82 0.40 0.57
10 A' 510 510 13.57 1.66 0.49 0.65
11 A" 3114 3114 9.91 67.84 0.75 0.86
12 A" 1487 1487 11.23 9.57 0.75 0.86
13 A" 1142 1142 0.33 1.10 0.75 0.86
14 A" 783 783 0.59 5.63 0.75 0.86
15 A" 160 160 0.52 1.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12226.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12226.9 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 B2PLYP/6-311G**
ABC
1.90234 0.33795 0.30306

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.463 0.000
C2 -0.934 -0.718 0.000
O3 1.205 0.383 0.000
H4 -0.499 1.455 0.000
H5 -0.367 -1.648 0.000
H6 -1.584 -0.672 0.879
H7 -1.584 -0.672 -0.879

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50591.20771.11092.14242.13782.1378
C21.50592.40642.21631.08901.09421.0942
O31.20772.40642.01352.56873.10903.1090
H41.11092.21632.01353.10572.54472.5447
H52.14241.08902.56873.10571.79011.7901
H62.13781.09423.10902.54471.79011.7589
H72.13781.09423.10902.54471.79011.7589

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.270 C1 C2 H6 109.601
C1 C2 H7 109.601 C2 C1 O3 124.578
C2 C1 H4 114.930 O3 C1 H4 120.492
H5 C2 H6 110.161 H5 C2 H7 110.161
H6 C2 H7 106.986
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.153      
2 C -0.327      
3 O -0.270      
4 H 0.063      
5 H 0.131      
6 H 0.125      
7 H 0.125      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.618 0.103 -0.002
y 0.103 3.914 -0.000
z -0.002 -0.000 2.812


<r2> (average value of r2) Å2
<r2> 46.971
(<r2>)1/2 6.854