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All results from a given calculation for C2Br4 (tetrabromoethene)

using model chemistry: QCISD(T)=FULL/cc-pVDZ

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(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-10366.099625
Energy at 298.15K 
HF Energy-10365.215128
Nuclear repulsion energy1467.270733
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(T)=FULL/cc-pVDZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)=FULL/cc-pVDZ
ABC
0.02095 0.01817 0.00973

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVDZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.681
C2 0.000 0.000 -0.681
Br3 0.000 1.597 1.704
Br4 0.000 -1.597 1.704
Br5 0.000 -1.597 -1.704
Br6 0.000 1.597 -1.704

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 Br6
C11.36211.89621.89622.87022.8702
C21.36212.87022.87021.89621.8962
Br31.89622.87023.19324.67043.4082
Br41.89622.87023.19323.40824.6704
Br52.87021.89624.67043.40823.1932
Br62.87021.89623.40824.67043.1932

picture of tetrabromoethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br5 122.650 C1 C2 Br6 122.650
C2 C1 Br3 122.650 C2 C1 Br4 122.650
Br3 C1 Br4 114.700 Br5 C2 Br6 114.700
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability