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-20.317558
Energy at 298.15K-20.323877
HF Energy-19.910636
Nuclear repulsion energy42.363325
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' 3156 3010 0.00      
2 A1' 1554 1482 0.00      
3 A1' 1221 1164 0.00      
4 A1" 1160 1106 0.00      
5 A2' 1066 1017 0.00      
6 A2" 3255 3104 72.30      
7 A2" 843 804 1.16      
8 E' 3142 2997 36.13      
8 E' 3142 2997 36.13      
9 E' 1473 1405 0.99      
9 E' 1473 1405 0.99      
10 E' 1072 1022 8.92      
10 E' 1072 1022 8.92      
11 E' 889 848 25.76      
11 E' 889 848 25.76      
12 E" 3234 3084 0.00      
12 E" 3234 3084 0.00      
13 E" 1205 1149 0.00      
13 E" 1205 1149 0.00      
14 E" 731 697 0.00      
14 E" 731 697 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 17871.8 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 17044.4 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
0.64809 0.64809 0.40513

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 0.888 0.000
C2 0.769 -0.444 0.000
C3 -0.769 -0.444 0.000
H4 0.000 1.477 0.928
H5 1.279 -0.739 0.928
H6 -1.279 -0.739 0.928
H7 0.000 1.477 -0.928
H8 1.279 -0.739 -0.928
H9 -1.279 -0.739 -0.928

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9
C11.53881.53881.09892.26822.26821.09892.26822.2682
C21.53881.53882.26821.09892.26822.26821.09892.2682
C31.53881.53882.26822.26821.09892.26822.26821.0989
H41.09892.26822.26822.55862.55861.85573.16073.1607
H52.26821.09892.26822.55862.55863.16071.85573.1607
H62.26822.26821.09892.55862.55863.16073.16071.8557
H71.09892.26822.26821.85573.16073.16072.55862.5586
H82.26821.09892.26823.16071.85573.16072.55862.5586
H92.26822.26821.09893.16073.16071.85572.55862.5586

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 117.647
C1 C2 H8 117.647 C1 C3 C2 60.000
C1 C3 H6 117.647 C1 C3 H9 117.647
C2 C1 C3 60.000 C2 C1 H4 117.647
C2 C1 H7 117.647 C2 C3 H6 117.647
C2 C3 H9 117.647 C3 C1 H4 117.647
C3 C1 H7 117.647 C3 C2 H5 117.647
C3 C2 H8 117.647 H4 C1 H7 115.203
H5 C2 H8 115.203 H6 C3 H9 115.203
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability