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All results from a given calculation for CH3CHO (Acetaldehyde)

using model chemistry: B2PLYP=FULLultrafine/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=FULLultrafine/6-311+G(3df,2p)
 hartrees
Energy at 0K-153.783645
Energy at 298.15K 
HF Energy-153.579104
Nuclear repulsion energy69.850476
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=FULLultrafine/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' 3168 3168 7.76 41.67 0.70 0.82
2 A' 3049 3049 2.38 172.81 0.01 0.01
3 A' 2914 2914 111.73 154.05 0.30 0.46
4 A' 1792 1792 171.00 11.29 0.47 0.64
5 A' 1477 1477 23.48 9.34 0.56 0.72
6 A' 1431 1431 10.09 4.46 0.31 0.47
7 A' 1393 1393 21.83 1.95 0.75 0.86
8 A' 1140 1140 24.40 2.75 0.17 0.29
9 A' 897 897 8.27 5.75 0.32 0.49
10 A' 511 511 13.37 1.46 0.31 0.47
11 A" 3110 3110 6.07 57.97 0.75 0.86
12 A" 1486 1486 10.05 3.84 0.75 0.86
13 A" 1141 1141 0.07 1.29 0.75 0.86
14 A" 779 779 1.22 2.88 0.75 0.86
15 A" 158 158 1.42 0.96 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 12222.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12222.5 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=FULLultrafine/6-311+G(3df,2p)
ABC
1.91495 0.34003 0.30489

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.460 0.000
C2 -0.933 -0.712 0.000
O3 1.204 0.378 0.000
H4 -0.487 1.454 0.000
H5 -0.380 -1.646 0.000
H6 -1.582 -0.659 0.875
H7 -1.582 -0.659 -0.875

Atom - Atom Distances (Å)
  C1 C2 O3 H4 H5 H6 H7
C11.49841.20651.10682.14072.12652.1265
C21.49842.39882.21151.08541.09091.0909
O31.20652.39882.00432.57073.09873.0987
H41.10682.21152.00433.10222.53582.5358
H52.14071.08542.57073.10221.78431.7843
H62.12651.09093.09872.53581.78431.7509
H72.12651.09093.09872.53581.78431.7509

picture of Acetaldehyde state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.885 C1 C2 H6 109.417
C1 C2 H7 109.417 C2 C1 O3 124.612
C2 C1 H4 115.359 O3 C1 H4 120.029
H5 C2 H6 110.147 H5 C2 H7 110.147
H6 C2 H7 106.735
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability