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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B3LYP/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/CEP-121G*
 hartrees
Energy at 0K-29.680241
Energy at 298.15K-29.684123
HF Energy-29.680241
Nuclear repulsion energy39.074383
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 B3LYP/CEP-121G*
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' 3134 3038 18.19 56.03 0.70 0.83
2 A' 3013 2921 5.17 160.14 0.01 0.02
3 A' 2879 2791 150.98 163.07 0.35 0.52
4 A' 1782 1727 183.25 9.20 0.63 0.78
5 A' 1473 1427 23.31 16.94 0.65 0.79
6 A' 1423 1379 15.10 8.27 0.55 0.71
7 A' 1384 1341 17.18 4.46 0.74 0.85
8 A' 1120 1085 24.16 3.44 0.34 0.51
9 A' 873 846 8.30 7.55 0.38 0.55
10 A' 497 482 13.01 1.51 0.49 0.65
11 A" 3071 2977 17.46 72.88 0.75 0.86
12 A" 1479 1434 11.79 10.99 0.75 0.86
13 A" 1129 1094 0.13 1.12 0.75 0.86
14 A" 768 744 0.64 7.52 0.75 0.86
15 A" 152 148 0.66 1.14 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12087.1 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 11717.3 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 B3LYP/CEP-121G*
ABC
1.87792 0.33172 0.29755

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.467 0.000
C2 -0.943 -0.725 0.000
O3 1.216 0.387 0.000
H4 -0.497 1.467 0.000
H5 -0.380 -1.662 0.000
H6 -1.597 -0.678 0.883
H7 -1.597 -0.678 -0.883

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51991.21891.11642.16302.15442.1544
C21.51992.42912.23641.09391.09971.0997
O31.21892.42912.02502.59793.13533.1353
H41.11642.23642.02503.13122.56672.5667
H52.16301.09392.59793.13121.79761.7976
H62.15441.09973.13532.56671.79761.7656
H72.15441.09973.13532.56671.79761.7656

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.636 C1 C2 H6 109.606
C1 C2 H7 109.606 C2 C1 O3 124.614
C2 C1 H4 115.198 O3 C1 H4 120.189
H5 C2 H6 110.063 H5 C2 H7 110.063
H6 C2 H7 106.788
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.116      
2 C -0.510      
3 O -0.256      
4 H 0.098      
5 H 0.190      
6 H 0.181      
7 H 0.181      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.782 -0.296 0.000 2.798
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.046 -0.853 0.000
y -0.853 -17.964 0.000
z 0.000 0.000 -17.914
Traceless
 xyz
x -3.107 -0.853 0.000
y -0.853 1.516 0.000
z 0.000 0.000 1.591
Polar
3z2-r23.182
x2-y2-3.082
xy-0.853
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.900 0.090 0.000
y 0.090 4.093 0.000
z 0.000 0.000 2.994


<r2> (average value of r2) Å2
<r2> 41.047
(<r2>)1/2 6.407