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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: mPW1PW91/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 mPW1PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-153.810682
Energy at 298.15K-153.814608
HF Energy-153.810682
Nuclear repulsion energy69.709360
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 mPW1PW91/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' 3186 3053 8.05 43.25 0.71 0.83
2 A' 3052 2925 2.01 190.85 0.01 0.01
3 A' 2919 2797 115.50 159.49 0.29 0.45
4 A' 1834 1758 196.55 12.25 0.52 0.68
5 A' 1434 1374 22.36 10.85 0.50 0.67
6 A' 1416 1357 11.17 1.84 0.33 0.50
7 A' 1356 1299 27.28 2.19 0.75 0.86
8 A' 1130 1083 22.93 2.98 0.18 0.30
9 A' 902 864 6.15 5.22 0.32 0.49
10 A' 506 485 14.04 1.21 0.32 0.48
11 A" 3126 2996 5.38 59.43 0.75 0.86
12 A" 1444 1383 10.50 3.82 0.75 0.86
13 A" 1127 1080 0.11 1.31 0.75 0.86
14 A" 767 735 1.66 2.90 0.75 0.86
15 A" 165 158 1.17 1.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12180.6 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 11672.7 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 mPW1PW91/aug-cc-pVDZ
ABC
1.89901 0.33968 0.30445

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.459 0.000
C2 -0.933 -0.712 0.000
O3 1.205 0.377 0.000
H4 -0.490 1.462 0.000
H5 -0.376 -1.654 0.000
H6 -1.587 -0.655 0.882
H7 -1.587 -0.655 -0.882

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49731.20751.11612.14592.13072.1307
C21.49732.39912.21851.09401.09951.0995
O31.20752.39912.01232.57333.10483.1048
H41.11612.21852.01233.11762.54262.5426
H52.14591.09402.57333.11761.80051.8005
H62.13071.09953.10482.54261.80051.7633
H72.13071.09953.10482.54261.80051.7633

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.852 C1 C2 H6 109.313
C1 C2 H7 109.313 C2 C1 O3 124.646
C2 C1 H4 115.413 O3 C1 H4 119.941
H5 C2 H6 110.327 H5 C2 H7 110.327
H6 C2 H7 106.608
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.634      
2 C 0.184      
3 O -0.491      
4 H -0.153      
5 H -0.105      
6 H -0.034      
7 H -0.034      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.894 -0.324 0.000 2.912
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.247 -0.774 0.000
y -0.774 -17.869 0.000
z 0.000 0.000 -17.895
Traceless
 xyz
x -3.365 -0.774 0.000
y -0.774 1.702 0.000
z 0.000 0.000 1.663
Polar
3z2-r23.326
x2-y2-3.378
xy-0.774
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.380 0.210 0.000
y 0.210 4.586 0.000
z 0.000 0.000 3.510


<r2> (average value of r2) Å2
<r2> 46.853
(<r2>)1/2 6.845