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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP=FULL/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 B2PLYP=FULL/6-311G*
 hartrees
Energy at 0K-153.727527
Energy at 298.15K-153.731452
HF Energy-153.557249
Nuclear repulsion energy69.661422
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=FULL/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3174 3174 12.97 52.15 0.72 0.84
2 A' 3057 3057 3.51 136.44 0.01 0.02
3 A' 2916 2916 148.81 160.61 0.34 0.51
4 A' 1807 1807 152.30 7.28 0.72 0.84
5 A' 1496 1496 24.37 16.75 0.66 0.80
6 A' 1446 1446 13.25 8.45 0.53 0.70
7 A' 1408 1408 24.25 3.96 0.68 0.81
8 A' 1146 1146 23.85 2.28 0.35 0.52
9 A' 898 898 7.48 5.86 0.42 0.59
10 A' 512 512 13.31 1.60 0.48 0.65
11 A" 3119 3119 11.77 69.44 0.75 0.86
12 A" 1503 1503 12.47 10.46 0.75 0.86
13 A" 1149 1149 0.49 1.07 0.75 0.86
14 A" 785 785 0.80 6.26 0.75 0.86
15 A" 157 157 0.51 1.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12285.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12285.7 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 B2PLYP=FULL/6-311G*
ABC
1.90786 0.33773 0.30297

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.462 0.000
C2 -0.934 -0.717 0.000
O3 1.205 0.384 0.000
H4 -0.495 1.456 0.000
H5 -0.369 -1.648 0.000
H6 -1.585 -0.677 0.878
H7 -1.585 -0.677 -0.878

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.50501.20761.11052.14202.14042.1404
C21.50502.40662.21771.08851.09371.0937
O31.20762.40662.01002.57043.11163.1116
H41.11052.21772.01003.10652.55122.5512
H52.14201.08852.57043.10651.78681.7868
H62.14041.09373.11162.55121.78681.7564
H72.14041.09373.11162.55121.78681.7564

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.327 C1 C2 H6 109.885
C1 C2 H7 109.885 C2 C1 O3 124.678
C2 C1 H4 115.136 O3 C1 H4 120.186
H5 C2 H6 109.928 H5 C2 H7 109.928
H6 C2 H7 106.824
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability