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All results from a given calculation for CH3CH2CHO (Propanal)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-191.275474
Energy at 298.15K-191.281886
HF Energy-190.874025
Nuclear repulsion energy117.276289
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 MP2/3-21G*
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' 3177 3023 17.07      
2 A' 3104 2952 12.68      
3 A' 3078 2928 14.13      
4 A' 2964 2819 132.40      
5 A' 1643 1563 27.71      
6 A' 1599 1521 5.37      
7 A' 1556 1480 18.88      
8 A' 1503 1430 7.87      
9 A' 1459 1388 3.83      
10 A' 1390 1323 10.96      
11 A' 1132 1077 18.78      
12 A' 1026 976 2.29      
13 A' 848 807 18.45      
14 A' 688 655 2.60      
15 A' 275 262 9.27      
16 A" 3181 3026 18.89      
17 A" 3113 2962 6.52      
18 A" 1603 1525 6.45      
19 A" 1347 1281 0.34      
20 A" 1200 1142 0.75      
21 A" 949 903 1.54      
22 A" 728 693 5.59      
23 A" 238 227 0.46      
24 A" 132 126 1.29      

Unscaled Zero Point Vibrational Energy (zpe) 18966.9 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 18043.2 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 MP2/3-21G*
ABC
0.52663 0.19872 0.15247

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.448 0.416 0.000
C2 0.000 0.952 0.000
C3 -1.012 -0.189 0.000
O4 -0.697 -1.400 0.000
H5 2.167 1.241 0.000
H6 1.620 -0.205 0.883
H7 1.620 -0.205 -0.883
H8 -0.191 1.579 0.882
H9 -0.191 1.579 -0.882
H10 -2.069 0.132 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8 H9 H10
C11.54382.53312.81011.09391.09341.09342.19432.19433.5284
C21.54381.52462.45222.18592.17742.17741.09891.09892.2255
C32.53311.52461.25103.48522.77582.77582.13932.13931.1047
O42.81012.45221.25103.89502.75202.75203.14723.14722.0560
H51.09392.18593.48523.89501.78041.78042.53952.53954.3785
H61.09342.17742.77582.75201.78041.76672.54143.09443.8078
H71.09342.17742.77582.75201.78041.76673.09442.54143.8078
H82.19431.09892.13933.14722.53952.54143.09441.76402.5299
H92.19431.09892.13933.14722.53953.09442.54141.76402.5299
H103.52842.22551.10472.05604.37853.80783.80782.52992.5299

picture of Propanal state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 111.286 C1 C2 H8 111.143
C1 C2 H9 111.143 C2 C1 H5 110.778
C2 C1 H6 110.136 C2 C1 H7 110.136
C2 C3 O4 123.839 C2 C3 H10 114.714
C3 C2 H8 108.166 C3 C2 H9 108.166
O4 C3 H10 121.447 H5 C1 H6 108.969
H5 C1 H7 108.969 H6 C1 H7 107.786
H8 C2 H9 106.757
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability