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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/cc-pVDZ
 hartrees
Energy at 0K-153.649054
Energy at 298.15K-153.652921
HF Energy-153.649054
Nuclear repulsion energy69.065046
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 PBEPBEultrafine/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' 3097 3079 6.83 59.25 0.72 0.84
2 A' 2964 2946 1.50 156.75 0.01 0.02
3 A' 2754 2738 163.19 176.75 0.32 0.49
4 A' 1779 1769 160.84 8.16 0.68 0.81
5 A' 1380 1372 17.18 23.63 0.64 0.78
6 A' 1361 1354 12.28 6.11 0.73 0.84
7 A' 1297 1290 26.39 7.76 0.73 0.85
8 A' 1085 1079 23.78 2.39 0.25 0.40
9 A' 865 860 7.70 5.57 0.49 0.65
10 A' 487 484 10.88 1.40 0.53 0.69
11 A" 3037 3019 3.93 77.51 0.75 0.86
12 A" 1390 1382 10.09 12.97 0.75 0.86
13 A" 1078 1071 0.98 2.49 0.75 0.86
14 A" 739 734 1.06 6.11 0.75 0.86
15 A" 167 166 0.00 1.30 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11739.1 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 11671.0 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 PBEPBEultrafine/cc-pVDZ
ABC
1.86899 0.33341 0.29890

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.461 0.000
C2 -0.937 -0.720 0.000
O3 1.216 0.387 0.000
H4 -0.521 1.469 0.000
H5 -0.372 -1.671 0.000
H6 -1.603 -0.669 0.888
H7 -1.603 -0.669 -0.888

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50791.21781.13502.16392.15322.1532
C21.50792.42072.22841.10581.11141.1114
O31.21782.42072.04672.59883.13833.1383
H41.13502.22842.04673.14332.55542.5554
H52.16391.10582.59883.14331.81881.8188
H62.15321.11143.13832.55541.81881.7766
H72.15321.11143.13832.55541.81881.7766

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.834 C1 C2 H6 109.654
C1 C2 H7 109.654 C2 C1 O3 124.934
C2 C1 H4 114.211 O3 C1 H4 120.854
H5 C2 H6 110.236 H5 C2 H7 110.236
H6 C2 H7 106.118
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.078      
2 C -0.077      
3 O -0.165      
4 H -0.011      
5 H 0.053      
6 H 0.061      
7 H 0.061      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.395 -0.363 0.000 2.423
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.267 -0.655 0.000
y -0.655 -18.100 0.000
z 0.000 0.000 -17.745
Traceless
 xyz
x -2.344 -0.655 0.000
y -0.655 0.906 0.000
z 0.000 0.000 1.438
Polar
3z2-r22.876
x2-y2-2.167
xy-0.655
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.694 0.166 0.000
y 0.166 4.166 0.000
z 0.000 0.000 2.780


<r2> (average value of r2) Å2
<r2> 47.331
(<r2>)1/2 6.880