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 C3H6 (Cyclopropane)

using model chemistry: QCISD/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D3H 1A1'
Energy calculated at QCISD/CEP-31G
 hartrees
Energy at 0K-20.140145
Energy at 298.15K-20.146488
HF Energy-19.855174
Nuclear repulsion energy41.778747
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/CEP-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1' 3110 2966 0.00      
2 A1' 1524 1453 0.00      
3 A1' 1179 1125 0.00      
4 A1" 1158 1105 0.00      
5 A2' 1113 1061 0.00      
6 A2" 3211 3063 106.76      
7 A2" 854 814 2.21      
8 E' 3092 2949 42.14      
8 E' 3092 2949 42.14      
9 E' 1473 1405 1.62      
9 E' 1473 1405 1.62      
10 E' 1106 1055 13.42      
10 E' 1106 1055 13.42      
11 E' 843 804 25.73      
11 E' 843 804 25.73      
12 E" 3189 3041 0.00      
12 E" 3189 3041 0.00      
13 E" 1207 1151 0.00      
13 E" 1207 1151 0.00      
14 E" 764 728 0.00      
14 E" 764 728 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 17747.4 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 16925.7 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 QCISD/CEP-31G
ABC
0.62835 0.62835 0.39030

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/CEP-31G

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.906 0.000
C2 0.785 -0.453 0.000
C3 -0.785 -0.453 0.000
H4 0.000 1.502 0.930
H5 1.301 -0.751 0.930
H6 -1.301 -0.751 0.930
H7 0.000 1.502 -0.930
H8 1.301 -0.751 -0.930
H9 -1.301 -0.751 -0.930

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9
C11.56921.56921.10482.30292.30291.10482.30292.3029
C21.56921.56922.30291.10482.30292.30291.10482.3029
C31.56921.56922.30292.30291.10482.30292.30291.1048
H41.10482.30292.30292.60172.60171.86043.19843.1984
H52.30291.10482.30292.60172.60173.19841.86043.1984
H62.30292.30291.10482.60172.60173.19843.19841.8604
H71.10482.30292.30291.86043.19843.19842.60172.6017
H82.30291.10482.30293.19841.86043.19842.60172.6017
H92.30292.30291.10483.19843.19841.86042.60172.6017

picture of Cyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 60.000 C1 C2 H5 117.856
C1 C2 H8 117.856 C1 C3 C2 60.000
C1 C3 H6 117.856 C1 C3 H9 117.856
C2 C1 C3 60.000 C2 C1 H4 117.856
C2 C1 H7 117.856 C2 C3 H6 117.856
C2 C3 H9 117.856 C3 C1 H4 117.856
C3 C1 H7 117.856 C3 C2 H5 117.856
C3 C2 H8 117.856 H4 C1 H7 114.696
H5 C2 H8 114.696 H6 C3 H9 114.696
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability