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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: TPSSh/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at TPSSh/6-31G**
 hartrees
Energy at 0K-153.838201
Energy at 298.15K-153.842091
HF Energy-153.838201
Nuclear repulsion energy69.416483
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 TPSSh/6-31G**
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 3037 12.22 54.99 0.71 0.83
2 A' 3040 2914 3.44 135.47 0.01 0.03
3 A' 2889 2769 145.41 138.53 0.35 0.51
4 A' 1820 1745 152.43 6.84 0.54 0.70
5 A' 1486 1424 16.22 23.02 0.69 0.81
6 A' 1439 1379 12.04 8.76 0.64 0.78
7 A' 1392 1334 16.37 7.05 0.73 0.84
8 A' 1131 1085 24.79 3.41 0.44 0.62
9 A' 887 851 8.52 6.16 0.38 0.55
10 A' 495 475 12.65 1.16 0.50 0.67
11 A" 3102 2974 10.95 74.91 0.75 0.86
12 A" 1498 1436 8.54 14.83 0.75 0.86
13 A" 1136 1089 0.72 0.96 0.75 0.86
14 A" 769 737 0.90 7.78 0.75 0.86
15 A" 153 147 0.27 1.13 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12201.6 cm-1
Scaled (by 0.9587) Zero Point Vibrational Energy (zpe) 11697.7 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 TPSSh/6-31G**
ABC
1.88974 0.33597 0.30116

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.939 -0.715 0.000
O3 1.212 0.379 0.000
H4 -0.497 1.460 0.000
H5 -0.377 -1.650 0.000
H6 -1.593 -0.668 0.880
H7 -1.593 -0.668 -0.880

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50791.21481.11322.14802.14312.1431
C21.50792.41332.22021.09091.09691.0969
O31.21482.41332.02242.57733.12013.1201
H41.11322.22022.02243.11302.55052.5505
H52.14801.09092.57733.11301.79331.7933
H62.14311.09693.12012.55051.79331.7596
H72.14311.09693.12012.55051.79331.7596

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.462 C1 C2 H6 109.718
C1 C2 H7 109.718 C2 C1 O3 124.491
C2 C1 H4 114.950 O3 C1 H4 120.559
H5 C2 H6 110.104 H5 C2 H7 110.104
H6 C2 H7 106.660
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.287      
2 C -0.439      
3 O -0.388      
4 H 0.083      
5 H 0.159      
6 H 0.149      
7 H 0.149      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.620 -0.298 0.000 2.637
CHELPG        
AIM        
ESP        


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 4.470 0.123 0.000
y 0.123 3.724 0.000
z 0.000 0.000 2.629


<r2> (average value of r2) Å2
<r2> 46.904
(<r2>)1/2 6.849