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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31G**
 hartrees
Energy at 0K-153.667666
Energy at 298.15K-153.671574
HF Energy-153.667666
Nuclear repulsion energy69.730573
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 HSEh1PBE/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' 3194 3048 6.93 51.18 0.72 0.84
2 A' 3061 2921 1.46 127.36 0.01 0.02
3 A' 2914 2781 130.02 126.86 0.34 0.50
4 A' 1872 1786 162.88 7.57 0.53 0.70
5 A' 1468 1401 17.81 23.19 0.68 0.81
6 A' 1439 1373 12.93 6.83 0.64 0.78
7 A' 1383 1320 25.46 6.21 0.75 0.85
8 A' 1136 1084 25.16 3.05 0.41 0.59
9 A' 902 861 6.66 5.61 0.40 0.57
10 A' 507 484 13.35 1.08 0.48 0.65
11 A" 3134 2991 5.52 69.37 0.75 0.86
12 A" 1480 1412 10.93 14.27 0.75 0.86
13 A" 1141 1089 1.48 1.15 0.75 0.86
14 A" 774 739 1.21 7.33 0.75 0.86
15 A" 156 149 0.25 1.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12279.4 cm-1
Scaled (by 0.9543) Zero Point Vibrational Energy (zpe) 11718.3 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 HSEh1PBE/6-31G**
ABC
1.90279 0.33947 0.30426

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.461 0.000
C2 -0.932 -0.713 0.000
O3 1.204 0.380 0.000
H4 -0.500 1.457 0.000
H5 -0.368 -1.647 0.000
H6 -1.586 -0.668 0.879
H7 -1.586 -0.668 -0.879

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49961.20701.11382.13982.13642.1364
C21.49962.39992.21261.09081.09621.0962
O31.20702.39992.01592.56453.10743.1074
H41.11382.21262.01593.10612.54322.5432
H52.13981.09082.56453.10611.79261.7926
H62.13641.09623.10742.54321.79261.7577
H72.13641.09623.10742.54321.79261.7577

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.391 C1 C2 H6 109.796
C1 C2 H7 109.796 C2 C1 O3 124.558
C2 C1 H4 114.894 O3 C1 H4 120.548
H5 C2 H6 110.098 H5 C2 H7 110.098
H6 C2 H7 106.590
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.284      
2 C -0.470      
3 O -0.386      
4 H 0.086      
5 H 0.168      
6 H 0.159      
7 H 0.159      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.668 -0.308 0.000 2.685
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.428 -0.769 0.000
y -0.769 -17.642 0.000
z 0.000 0.000 -17.573
Traceless
 xyz
x -2.821 -0.769 0.000
y -0.769 1.359 0.000
z 0.000 0.000 1.462
Polar
3z2-r22.923
x2-y2-2.786
xy-0.769
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.402 0.110 0.000
y 0.110 3.664 0.000
z 0.000 0.000 2.608


<r2> (average value of r2) Å2
<r2> 46.571
(<r2>)1/2 6.824