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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: PBEPBEultrafine/6-311G*

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/6-311G*
 hartrees
Energy at 0K-153.679274
Energy at 298.15K-153.683135
HF Energy-153.679274
Nuclear repulsion energy69.292879
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/6-311G*
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' 3083 3051 13.42 56.05 0.71 0.83
2 A' 2962 2932 2.56 147.56 0.01 0.02
3 A' 2766 2737 174.56 178.51 0.34 0.51
4 A' 1775 1756 166.32 8.73 0.70 0.83
5 A' 1427 1413 25.21 19.25 0.63 0.77
6 A' 1388 1373 11.12 8.23 0.66 0.79
7 A' 1333 1319 34.00 6.03 0.74 0.85
8 A' 1098 1086 24.63 1.81 0.33 0.50
9 A' 863 854 9.22 5.32 0.50 0.67
10 A' 493 488 11.10 1.59 0.52 0.68
11 A" 3022 2991 8.96 73.87 0.75 0.86
12 A" 1434 1419 13.40 10.89 0.75 0.86
13 A" 1093 1082 0.76 1.69 0.75 0.86
14 A" 745 737 1.35 6.80 0.75 0.86
15 A" 157 155 0.09 1.33 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 11819.2 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 11696.3 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 PBEPBEultrafine/6-311G*
ABC
1.89193 0.33438 0.30004

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.461 0.000
C2 -0.935 -0.722 0.000
O3 1.211 0.390 0.000
H4 -0.511 1.463 0.000
H5 -0.372 -1.664 0.000
H6 -1.596 -0.678 0.883
H7 -1.596 -0.678 -0.883

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50761.21311.12552.15662.15062.1506
C21.50762.41752.22591.09771.10371.1037
O31.21312.41752.02912.59323.13113.1311
H41.12552.22592.02913.13012.55812.5581
H52.15661.09772.59323.13011.80281.8028
H62.15061.10373.13112.55811.80281.7655
H72.15061.10373.13112.55811.80281.7655

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.755 C1 C2 H6 109.924
C1 C2 H7 109.924 C2 C1 O3 125.030
C2 C1 H4 114.639 O3 C1 H4 120.331
H5 C2 H6 109.957 H5 C2 H7 109.957
H6 C2 H7 106.224
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.096      
2 C -0.704      
3 O -0.245      
4 H 0.142      
5 H 0.238      
6 H 0.237      
7 H 0.237      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.527 -0.328 0.000 2.548
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.735 -0.763 0.000
y -0.763 -18.207 0.000
z 0.000 0.000 -17.965
Traceless
 xyz
x -2.649 -0.763 0.000
y -0.763 1.143 0.000
z 0.000 0.000 1.506
Polar
3z2-r23.012
x2-y2-2.528
xy-0.763
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.820 0.160 0.000
y 0.160 4.183 0.000
z 0.000 0.000 2.859


<r2> (average value of r2) Å2
<r2> 47.333
(<r2>)1/2 6.880