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All results from a given calculation for C2Br4 (tetrabromoethene)

using model chemistry: B2PLYP/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1AG
Energy calculated at B2PLYP/Def2TZVPP
 hartrees
Energy at 0K-10371.226263
Energy at 298.15K 
HF Energy-10370.762849
Nuclear repulsion energy1480.867282
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 B2PLYP/Def2TZVPP
Rotational Constants (cm-1) from geometry optimized at B2PLYP/Def2TZVPP
ABC
0.02132 0.01853 0.00991

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/Def2TZVPP

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.671
C2 0.000 0.000 -0.671
Br3 0.000 1.583 1.688
Br4 0.000 -1.583 1.688
Br5 0.000 -1.583 -1.688
Br6 0.000 1.583 -1.688

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 Br6
C11.34131.88131.88132.84012.8401
C21.34132.84012.84011.88131.8813
Br31.88132.84013.16534.62733.3753
Br41.88132.84013.16533.37534.6273
Br52.84011.88134.62733.37533.1653
Br62.84011.88133.37534.62733.1653

picture of tetrabromoethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br5 122.725 C1 C2 Br6 122.725
C2 C1 Br3 122.725 C2 C1 Br4 122.725
Br3 C1 Br4 114.550 Br5 C2 Br6 114.550
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.034      
2 C -0.034      
3 Br 0.017      
4 Br 0.017      
5 Br 0.017      
6 Br 0.017      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -85.162 0.000 0.000
y 0.000 -79.618 0.000
z 0.000 0.000 -82.671
Traceless
 xyz
x -4.017 0.000 0.000
y 0.000 4.299 0.000
z 0.000 0.000 -0.281
Polar
3z2-r2-0.562
x2-y2-5.544
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.023 0.000 0.000
y 0.000 18.056 0.000
z 0.000 0.000 18.463


<r2> (average value of r2) Å2
<r2> 806.342
(<r2>)1/2 28.396