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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: PBEPBEultrafine/aug-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/aug-cc-pVDZ
 hartrees
Energy at 0K-153.664362
Energy at 298.15K-153.668217
HF Energy-153.664362
Nuclear repulsion energy69.095369
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/aug-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' 3095 3076 7.88 46.92 0.71 0.83
2 A' 2962 2944 1.67 209.35 0.01 0.01
3 A' 2788 2771 137.86 195.58 0.30 0.46
4 A' 1744 1734 182.47 13.54 0.56 0.71
5 A' 1378 1369 20.81 12.65 0.49 0.66
6 A' 1360 1351 9.84 1.69 0.50 0.67
7 A' 1295 1288 32.91 3.35 0.74 0.85
8 A' 1087 1080 22.59 3.27 0.22 0.36
9 A' 866 861 7.70 5.77 0.45 0.62
10 A' 488 485 11.54 1.26 0.31 0.48
11 A" 3032 3013 4.09 65.22 0.75 0.86
12 A" 1386 1377 10.65 4.17 0.75 0.86
13 A" 1073 1066 0.03 1.91 0.75 0.86
14 A" 731 727 1.71 3.96 0.75 0.86
15 A" 159 158 0.64 1.51 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11721.7 cm-1
Scaled (by 0.9939) Zero Point Vibrational Energy (zpe) 11650.2 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/aug-cc-pVDZ
ABC
1.87059 0.33389 0.29925

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.460 0.000
C2 -0.942 -0.713 0.000
O3 1.218 0.377 0.000
H4 -0.497 1.474 0.000
H5 -0.389 -1.668 0.000
H6 -1.605 -0.651 0.887
H7 -1.605 -0.651 -0.887

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50501.22131.12872.16332.14422.1442
C21.50502.41992.23181.10291.10891.1089
O31.22132.41992.03642.60073.13293.1329
H41.12872.23182.03643.14322.55492.5549
H52.16331.10292.60073.14321.81621.8162
H62.14421.10893.13292.55491.81621.7730
H72.14421.10893.13292.55491.81621.7730

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 111.162 C1 C2 H6 109.294
C1 C2 H7 109.294 C2 C1 O3 124.821
C2 C1 H4 115.115 O3 C1 H4 120.064
H5 C2 H6 110.400 H5 C2 H7 110.400
H6 C2 H7 106.157
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.695      
2 C 0.384      
3 O -0.447      
4 H -0.228      
5 H -0.183      
6 H -0.110      
7 H -0.110      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.784 -0.366 0.000 2.808
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.419 -0.663 0.000
y -0.663 -18.267 0.000
z 0.000 0.000 -18.158
Traceless
 xyz
x -3.206 -0.663 0.000
y -0.663 1.521 0.000
z 0.000 0.000 1.685
Polar
3z2-r23.370
x2-y2-3.151
xy-0.663
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.845 0.241 0.000
y 0.241 5.019 0.000
z 0.000 0.000 3.706


<r2> (average value of r2) Å2
<r2> 47.629
(<r2>)1/2 6.901