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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP/6-311+G(3df,2p)
 hartrees
Energy at 0K-153.764539
Energy at 298.15K-153.768464
HF Energy-153.579060
Nuclear repulsion energy69.808841
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 B2PLYP/6-311+G(3df,2p)
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' 3165 3165 7.86 41.76 0.70 0.82
2 A' 3046 3046 2.43 173.07 0.01 0.01
3 A' 2912 2912 111.84 154.30 0.30 0.46
4 A' 1790 1790 170.76 11.26 0.47 0.64
5 A' 1476 1476 23.38 9.34 0.56 0.72
6 A' 1429 1429 10.08 4.48 0.31 0.47
7 A' 1392 1392 21.43 1.96 0.75 0.86
8 A' 1139 1139 24.45 2.76 0.17 0.29
9 A' 895 895 8.41 5.83 0.32 0.49
10 A' 510 510 13.35 1.47 0.31 0.47
11 A" 3107 3107 6.20 58.08 0.75 0.86
12 A" 1486 1486 9.97 3.85 0.75 0.86
13 A" 1140 1140 0.07 1.29 0.75 0.86
14 A" 779 779 1.20 2.89 0.75 0.86
15 A" 158 158 1.43 0.97 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12210.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12210.3 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 B2PLYP/6-311+G(3df,2p)
ABC
1.91240 0.33960 0.30450

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.461 0.000
C2 -0.934 -0.713 0.000
O3 1.204 0.379 0.000
H4 -0.488 1.455 0.000
H5 -0.380 -1.647 0.000
H6 -1.583 -0.660 0.876
H7 -1.583 -0.660 -0.876

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49971.20711.10732.14212.12792.1279
C21.49972.40042.21311.08591.09141.0914
O31.20712.40042.00532.57213.10043.1004
H41.10732.21312.00533.10402.53742.5374
H52.14211.08592.57213.10401.78521.7852
H62.12791.09143.10042.53741.78521.7518
H72.12791.09143.10042.53741.78521.7518

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.877 C1 C2 H6 109.407
C1 C2 H7 109.407 C2 C1 O3 124.596
C2 C1 H4 115.363 O3 C1 H4 120.041
H5 C2 H6 110.156 H5 C2 H7 110.156
H6 C2 H7 106.745
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.391      
2 C -0.423      
3 O -0.587      
4 H 0.126      
5 H 0.164      
6 H 0.165      
7 H 0.165      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.851 -0.295 0.000 2.866
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.448 -0.783 0.010
y -0.783 -18.066 0.004
z 0.010 0.004 -18.081
Traceless
 xyz
x -3.374 -0.783 0.010
y -0.783 1.698 0.004
z 0.010 0.004 1.676
Polar
3z2-r23.351
x2-y2-3.382
xy-0.783
xz0.010
yz0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.291 0.211 -0.001
y 0.211 4.474 -0.000
z -0.001 -0.000 3.439


<r2> (average value of r2) Å2
<r2> 46.920
(<r2>)1/2 6.850