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All results from a given calculation for C2Br4 (tetrabromoethene)

using model chemistry: QCISD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1AG
Energy calculated at QCISD/aug-cc-pVTZ
 hartrees
Energy at 0K-10366.840106
Energy at 298.15K 
HF Energy-10365.548821
Nuclear repulsion energy1486.738454
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/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD/aug-cc-pVTZ
ABC
0.02147 0.01869 0.00999

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.669
C2 0.000 0.000 -0.669
Br3 0.000 1.577 1.680
Br4 0.000 -1.577 1.680
Br5 0.000 -1.577 -1.680
Br6 0.000 1.577 -1.680

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 Br6
C11.33771.87351.87352.82942.8294
C21.33772.82942.82941.87351.8735
Br31.87352.82943.15434.60893.3604
Br41.87352.82943.15433.36044.6089
Br52.82941.87354.60893.36043.1543
Br62.82941.87353.36044.60893.1543

picture of tetrabromoethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br5 122.670 C1 C2 Br6 122.670
C2 C1 Br3 122.670 C2 C1 Br4 122.670
Br3 C1 Br4 114.659 Br5 C2 Br6 114.659
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability