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 C3H4 (cyclopropene)

using model chemistry: MP2/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at MP2/aug-cc-pVQZ
 hartrees
Energy at 0K-116.392963
Energy at 298.15K 
HF Energy-115.872860
Nuclear repulsion energy63.943046
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/aug-cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at MP2/aug-cc-pVQZ
ABC
1.00561 0.73663 0.46448

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVQZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.860
C2 0.000 0.648 -0.499
C3 0.000 -0.648 -0.499
H4 0.000 1.577 -1.035
H5 0.000 -1.577 -1.035
H6 0.912 0.000 1.446
H7 -0.912 0.000 1.446

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.50551.50552.46542.46541.08411.0841
C21.50551.29581.07272.28852.24372.2437
C31.50551.29582.28851.07272.24372.2437
H42.46541.07272.28853.15393.07803.0780
H52.46542.28851.07273.15393.07803.0780
H61.08412.24372.24373.07803.07801.8244
H71.08412.24372.24373.07803.07801.8244

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.512 C1 C2 H4 145.477
C1 C3 C2 64.512 C1 C3 H5 145.477
C2 C1 C3 50.977 C2 C1 H6 119.193
C2 C1 H7 119.193 C2 C3 H5 150.012
C3 C1 H6 119.193 C3 C1 H7 119.193
C3 C2 H4 150.012 H6 C1 H7 114.585
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability