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/3-21G*

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/3-21G*
 hartrees
Energy at 0K-116.706999
Energy at 298.15K-116.713379
HF Energy-116.399475
Nuclear repulsion energy74.724963
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 A1' 3158 3035 0.00      
2 A1' 1560 1500 0.00      
3 A1' 1128 1084 0.00      
4 A1" 1193 1146 0.00      
5 A2' 1158 1113 0.00      
6 A2" 3247 3121 25.52      
7 A2" 868 835 0.55      
8 E' 3146 3024 16.40      
8 E' 3146 3024 16.40      
9 E' 1537 1477 2.04      
9 E' 1537 1477 2.04      
10 E' 1131 1087 17.52      
10 E' 1131 1087 17.52      
11 E' 838 806 14.42      
11 E' 838 806 14.42      
12 E" 3225 3100 0.00      
12 E" 3225 3100 0.00      
13 E" 1240 1192 0.00      
13 E" 1240 1192 0.00      
14 E" 781 751 0.00      
14 E" 781 751 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 18054.3 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 17352.0 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
0.65370 0.65370 0.40694

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

Point Group is D3h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.887 0.000
C2 0.768 -0.444 0.000
C3 -0.768 -0.444 0.000
H4 0.000 1.472 0.916
H5 1.274 -0.736 0.916
H6 -1.274 -0.736 0.916
H7 0.000 1.472 -0.916
H8 1.274 -0.736 -0.916
H9 -1.274 -0.736 -0.916

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9
C11.53651.53651.08672.25772.25771.08672.25772.2577
C21.53651.53652.25771.08672.25772.25771.08672.2577
C31.53651.53652.25772.25771.08672.25772.25771.0867
H41.08672.25772.25772.54902.54901.83233.13923.1392
H52.25771.08672.25772.54902.54903.13921.83233.1392
H62.25772.25771.08672.54902.54903.13923.13921.8323
H71.08672.25772.25771.83233.13923.13922.54902.5490
H82.25771.08672.25773.13921.83233.13922.54902.5490
H92.25772.25771.08673.13923.13921.83232.54902.5490

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 117.764
C1 C2 H8 117.764 C1 C3 C2 60.000
C1 C3 H6 117.764 C1 C3 H9 117.764
C2 C1 C3 60.000 C2 C1 H4 117.764
C2 C1 H7 117.764 C2 C3 H6 117.764
C2 C3 H9 117.764 C3 C1 H4 117.764
C3 C1 H7 117.764 C3 C2 H5 117.764
C3 C2 H8 117.764 H4 C1 H7 114.919
H5 C2 H8 114.919 H6 C3 H9 114.919
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability