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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-153.766238
Energy at 298.15K-153.770170
HF Energy-153.580191
Nuclear repulsion energy69.793027
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/cc-pVTZ
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' 3167 3038 8.63 46.62 0.71 0.83
2 A' 3049 2925 2.43 160.80 0.01 0.02
3 A' 2909 2790 125.45 158.27 0.31 0.47
4 A' 1795 1723 152.94 8.17 0.68 0.81
5 A' 1474 1414 20.87 12.29 0.62 0.77
6 A' 1433 1375 9.16 6.58 0.41 0.58
7 A' 1390 1333 22.46 2.97 0.75 0.86
8 A' 1139 1093 23.59 2.30 0.22 0.36
9 A' 895 859 8.76 5.94 0.34 0.50
10 A' 509 489 13.52 1.53 0.44 0.61
11 A" 3110 2984 7.21 62.67 0.75 0.86
12 A" 1485 1425 9.33 6.78 0.75 0.86
13 A" 1142 1096 0.14 1.18 0.75 0.86
14 A" 781 750 0.80 4.12 0.75 0.86
15 A" 160 154 0.84 0.96 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12219.2 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 11723.1 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/cc-pVTZ
ABC
1.91237 0.33940 0.30434

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.461 0.000
C2 -0.934 -0.713 0.000
O3 1.205 0.379 0.000
H4 -0.492 1.453 0.000
H5 -0.377 -1.645 0.000
H6 -1.583 -0.663 0.876
H7 -1.583 -0.663 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50011.20761.10722.13922.12962.1296
C21.50012.40132.21061.08581.09131.0913
O31.20762.40132.00802.56833.10203.1020
H41.10722.21062.00803.09992.53642.5364
H52.13921.08582.56833.09991.78511.7851
H62.12961.09133.10202.53641.78511.7521
H72.12961.09133.10202.53641.78511.7521

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.613 C1 C2 H6 109.517
C1 C2 H7 109.517 C2 C1 O3 124.606
C2 C1 H4 115.122 O3 C1 H4 120.272
H5 C2 H6 110.161 H5 C2 H7 110.161
H6 C2 H7 106.792
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.137      
2 C -0.292      
3 O -0.246      
4 H 0.057      
5 H 0.121      
6 H 0.111      
7 H 0.111      


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 4.894 0.155 -0.002
y 0.155 4.206 -0.000
z -0.002 -0.000 3.128


<r2> (average value of r2) Å2
<r2> 46.833
(<r2>)1/2 6.843