return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3CH2CHO (Propanal)

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-191.309294
Energy at 298.15K-191.315678
HF Energy-190.874082
Nuclear repulsion energy117.101276
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 QCISD/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' 3109 3013 19.64      
2 A' 3044 2950 12.87      
3 A' 3022 2929 16.79      
4 A' 2916 2826 121.20      
5 A' 1682 1630 45.24      
6 A' 1575 1526 6.21      
7 A' 1539 1491 14.76      
8 A' 1485 1439 7.54      
9 A' 1447 1402 4.77      
10 A' 1379 1336 10.19      
11 A' 1120 1086 18.33      
12 A' 1010 979 2.52      
13 A' 832 807 17.04      
14 A' 680 659 3.33      
15 A' 273 265 9.53      
16 A" 3113 3017 22.24      
17 A" 3052 2958 7.52      
18 A" 1578 1529 6.03      
19 A" 1330 1289 0.34      
20 A" 1182 1146 0.69      
21 A" 936 907 1.50      
22 A" 720 698 4.68      
23 A" 234 226 0.61      
24 A" 130 126 1.69      

Unscaled Zero Point Vibrational Energy (zpe) 18693.3 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 18117.5 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 QCISD/3-21G
ABC
0.52583 0.19777 0.15192

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.453 0.417 0.000
C2 0.000 0.953 0.000
C3 -1.015 -0.193 0.000
O4 -0.700 -1.398 0.000
H5 2.173 1.245 0.000
H6 1.626 -0.207 0.887
H7 1.626 -0.207 -0.887
H8 -0.191 1.582 0.885
H9 -0.191 1.582 -0.885
H10 -2.075 0.127 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8 H9 H10
C11.54882.54172.81511.09821.09781.09782.20122.20123.5402
C21.54881.53082.45262.19292.18542.18541.10271.10272.2337
C32.54171.53081.24483.49752.78592.78592.14792.14791.1082
O42.81512.45261.24483.90382.75972.75973.14973.14972.0536
H51.09822.19293.49753.90381.78721.78722.54722.54724.3934
H61.09782.18542.78592.75971.78721.77402.54993.10543.8211
H71.09782.18542.78592.75971.78721.77403.10542.54993.8211
H82.20121.10272.14793.14972.54722.54993.10541.77092.5398
H92.20121.10272.14793.14972.54723.10542.54991.77092.5398
H103.54022.23371.10822.05364.39343.82113.82112.53982.5398

picture of Propanal state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 111.244 C1 C2 H8 111.113
C1 C2 H9 111.113 C2 C1 H5 110.729
C2 C1 H6 110.169 C2 C1 H7 110.169
C2 C3 O4 123.838 C2 C3 H10 114.706
C3 C2 H8 108.188 C3 C2 H9 108.188
O4 C3 H10 121.455 H5 C1 H6 108.951
H5 C1 H7 108.951 H6 C1 H7 107.806
H8 C2 H9 106.821
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability