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: CCSD=FULL/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 CCSD=FULL/cc-pVQZ
 hartrees
Energy at 0K-116.492614
Energy at 298.15K 
HF Energy-115.873302
Nuclear repulsion energy64.208571
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 CCSD=FULL/cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at CCSD=FULL/cc-pVQZ
ABC
1.01789 0.74044 0.46823

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/cc-pVQZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.857
C2 0.000 0.643 -0.497
C3 0.000 -0.643 -0.497
H4 0.000 1.569 -1.033
H5 0.000 -1.569 -1.033
H6 0.908 0.000 1.446
H7 -0.908 0.000 1.446

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.49961.49962.45642.45641.08271.0827
C21.49961.28671.06952.27652.24002.2400
C31.49961.28672.27651.06952.24002.2400
H42.45641.06952.27653.13873.07143.0714
H52.45642.27651.06953.13873.07143.0714
H61.08272.24002.24003.07143.07141.8165
H71.08272.24002.24003.07143.07141.8165

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.594 C1 C2 H4 145.432
C1 C3 C2 64.594 C1 C3 H5 145.432
C2 C1 C3 50.812 C2 C1 H6 119.448
C2 C1 H7 119.448 C2 C3 H5 149.974
C3 C1 H6 119.448 C3 C1 H7 119.448
C3 C2 H4 149.974 H6 C1 H7 114.051
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability