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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: BLYP/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/cc-pVDZ
 hartrees
Energy at 0K-153.780852
Energy at 298.15K-153.784722
HF Energy-153.780852
Nuclear repulsion energy68.836307
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 BLYP/cc-pVDZ
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' 3063 3068 11.23 60.92 0.71 0.83
2 A' 2941 2946 2.87 156.46 0.01 0.02
3 A' 2729 2733 171.56 177.91 0.33 0.50
4 A' 1751 1754 155.06 7.71 0.69 0.82
5 A' 1389 1392 16.58 23.24 0.65 0.79
6 A' 1367 1369 10.13 7.57 0.70 0.82
7 A' 1312 1314 19.42 8.35 0.73 0.84
8 A' 1082 1084 23.95 2.52 0.28 0.44
9 A' 854 855 10.21 6.02 0.46 0.63
10 A' 488 489 10.84 1.50 0.54 0.70
11 A" 2998 3003 8.54 79.84 0.75 0.86
12 A" 1401 1403 8.15 13.80 0.75 0.86
13 A" 1082 1084 0.79 2.36 0.75 0.86
14 A" 746 747 0.51 6.49 0.75 0.86
15 A" 168 168 0.02 1.35 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11685.7 cm-1
Scaled (by 1.0016) Zero Point Vibrational Energy (zpe) 11704.4 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 BLYP/cc-pVDZ
ABC
1.86218 0.33032 0.29628

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.464 0.000
C2 -0.940 -0.728 0.000
O3 1.218 0.394 0.000
H4 -0.526 1.470 0.000
H5 -0.372 -1.677 0.000
H6 -1.605 -0.679 0.890
H7 -1.605 -0.679 -0.890

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.51801.22041.13472.17352.16242.1624
C21.51802.43252.23651.10611.11211.1121
O31.22042.43252.04892.61163.14923.1492
H41.13472.23652.04893.15082.56442.5644
H52.17351.10612.61163.15081.81901.8190
H62.16241.11213.14922.56441.81901.7791
H72.16241.11213.14922.56441.81901.7791

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.864 C1 C2 H6 109.641
C1 C2 H7 109.641 C2 C1 O3 124.965
C2 C1 H4 114.160 O3 C1 H4 120.875
H5 C2 H6 110.175 H5 C2 H7 110.175
H6 C2 H7 106.238
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.092      
2 C 0.002      
3 O -0.158      
4 H -0.034      
5 H 0.027      
6 H 0.035      
7 H 0.035      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.356 -0.355 0.000 2.382
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.436 -0.659 0.000
y -0.659 -18.237 0.000
z 0.000 0.000 -17.807
Traceless
 xyz
x -2.414 -0.659 0.000
y -0.659 0.885 0.000
z 0.000 0.000 1.529
Polar
3z2-r23.059
x2-y2-2.199
xy-0.659
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.706 0.161 0.000
y 0.161 4.188 0.000
z 0.000 0.000 2.789


<r2> (average value of r2) Å2
<r2> 47.698
(<r2>)1/2 6.906