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All results from a given calculation for C2Br4 (tetrabromoethene)

using model chemistry: CISD/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1AG
Energy calculated at CISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-10365.991102
Energy at 298.15K 
HF Energy-10365.195660
Nuclear repulsion energy1491.863781
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 CISD/6-311+G(3df,2p)
Rotational Constants (cm-1) from geometry optimized at CISD/6-311+G(3df,2p)
ABC
0.02172 0.01873 0.01006

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-311+G(3df,2p)

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.662
C2 0.000 0.000 -0.662
Br3 0.000 1.568 1.679
Br4 0.000 -1.568 1.679
Br5 0.000 -1.568 -1.679
Br6 0.000 1.568 -1.679

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 Br6
C11.32451.86851.86852.81752.8175
C21.32452.81752.81751.86851.8685
Br31.86852.81753.13594.59403.3573
Br41.86852.81753.13593.35734.5940
Br52.81751.86854.59403.35733.1359
Br62.81751.86853.35734.59403.1359

picture of tetrabromoethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br5 122.952 C1 C2 Br6 122.952
C2 C1 Br3 122.952 C2 C1 Br4 122.952
Br3 C1 Br4 114.095 Br5 C2 Br6 114.095
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability