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All results from a given calculation for CH3CH2CHO (Propanal)

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-191.302421
Energy at 298.15K-191.308825
HF Energy-190.874920
Nuclear repulsion energy117.329234
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 CCD/3-21G*
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' 3122 2986 19.21      
2 A' 3056 2923 12.44      
3 A' 3034 2902 17.03      
4 A' 2945 2817 109.45      
5 A' 1726 1650 35.26      
6 A' 1580 1511 6.88      
7 A' 1545 1478 13.26      
8 A' 1490 1425 8.17      
9 A' 1462 1399 3.66      
10 A' 1388 1327 10.66      
11 A' 1126 1077 18.43      
12 A' 1019 974 2.11      
13 A' 842 805 16.20      
14 A' 687 657 4.01      
15 A' 276 264 9.30      
16 A" 3125 2989 22.02      
17 A" 3064 2930 7.68      
18 A" 1582 1513 6.16      
19 A" 1335 1277 0.40      
20 A" 1189 1137 1.03      
21 A" 940 899 1.07      
22 A" 724 693 5.16      
23 A" 236 226 0.59      
24 A" 135 129 1.70      

Unscaled Zero Point Vibrational Energy (zpe) 18812.7 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 17994.3 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 CCD/3-21G*
ABC
0.52862 0.19827 0.15244

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.452 0.415 0.000
C2 0.000 0.950 0.000
C3 -1.013 -0.194 0.000
O4 -0.701 -1.393 0.000
H5 2.171 1.245 0.000
H6 1.627 -0.207 0.887
H7 1.627 -0.207 -0.887
H8 -0.190 1.579 0.885
H9 -0.190 1.579 -0.885
H10 -2.073 0.123 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8 H9 H10
C11.54742.53982.81131.09761.09721.09722.19842.19843.5376
C21.54741.52792.44472.19122.18412.18411.10221.10222.2319
C32.53981.52791.23893.49452.78522.78522.14562.14561.1063
O42.81132.44471.23893.89902.75842.75843.14213.14212.0451
H51.09762.19123.49453.89901.78591.78592.54352.54354.3902
H61.09722.18412.78522.75841.78591.77332.54743.10283.8192
H71.09722.18412.78522.75841.78591.77333.10282.54743.8192
H82.19841.10222.14563.14212.54352.54743.10281.76962.5395
H92.19841.10222.14563.14212.54353.10282.54741.76962.5395
H103.53762.23191.10632.04514.39023.81923.81922.53952.5395

picture of Propanal state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 111.351 C1 C2 H8 111.024
C1 C2 H9 111.024 C2 C1 H5 110.725
C2 C1 H6 110.192 C2 C1 H7 110.192
C2 C3 O4 123.823 C2 C3 H10 114.893
C3 C2 H8 108.238 C3 C2 H9 108.238
O4 C3 H10 121.283 H5 C1 H6 108.920
H5 C1 H7 108.920 H6 C1 H7 107.826
H8 C2 H9 106.792
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability