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 C2H2F2 (Ethene, 1,2-difluoro-, (E)-)

using model chemistry: MP3/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at MP3/6-31+G**
 hartrees
Energy at 0K-276.337495
Energy at 298.15K 
HF Energy-275.724356
Nuclear repulsion energy110.796705
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 MP3/6-31+G**
Rotational Constants (cm-1) from geometry optimized at MP3/6-31+G**
ABC
1.90644 0.13358 0.12483

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3/6-31+G**

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.333 0.575 0.000
C2 0.333 -0.575 0.000
F3 0.333 1.746 0.000
F4 -0.333 -1.746 0.000
H5 -1.408 0.663 0.000
H6 1.408 -0.663 0.000

Atom - Atom Distances (Å)
  C1 C2 F3 F4 H5 H6
C11.32911.34672.32071.07842.1362
C21.32912.32071.34672.13621.0784
F31.34672.32073.55422.04982.6377
F42.32071.34673.55422.63772.0498
H51.07842.13622.04982.63773.1123
H62.13621.07842.63772.04983.1123

picture of Ethene, 1,2-difluoro-, (E)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 F4 120.293 C1 C2 H6 124.757
C2 C1 F3 120.293 C2 C1 H5 124.757
F3 C1 H5 114.950 F4 C2 H6 114.950
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability