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All results from a given calculation for C2Br4 (tetrabromoethene)

using model chemistry: wB97X-D/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1AG
Energy calculated at wB97X-D/6-31G
 hartrees
Energy at 0K-10362.500576
Energy at 298.15K 
HF Energy-10362.500576
Nuclear repulsion energy1469.519863
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 wB97X-D/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 1699 1699 0.00 33.33 0.22 0.37
2 Ag 269 269 0.00 12.69 0.20 0.34
3 Ag 148 148 0.00 4.56 0.70 0.82
4 Au 62 62 0.00 0.00 0.00 0.00
5 B1u 632 632 28.06 0.00 0.00 0.00
6 B1u 188 188 0.05 0.00 0.00 0.00
7 B2g 568 568 0.00 2.65 0.75 0.86
8 B2u 781 781 111.85 0.00 0.00 0.00
9 B2u 124 124 0.39 0.00 0.00 0.00
10 B3g 907 907 0.00 8.04 0.75 0.86
11 B3g 221 221 0.00 4.41 0.75 0.86
12 B3u 264 264 3.16 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 2930.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 2930.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at wB97X-D/6-31G
ABC
0.02077 0.01845 0.00977

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.665
C2 0.000 0.000 -0.665
Br3 0.000 1.603 1.691
Br4 0.000 -1.603 1.691
Br5 0.000 -1.603 -1.691
Br6 0.000 1.603 -1.691

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 Br6
C11.33041.90361.90362.85032.8503
C21.33042.85032.85031.90361.9036
Br31.90362.85033.20664.66103.3828
Br41.90362.85033.20663.38284.6610
Br52.85031.90364.66103.38283.2066
Br62.85031.90363.38284.66103.2066

picture of tetrabromoethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br5 122.622 C1 C2 Br6 122.622
C2 C1 Br3 122.622 C2 C1 Br4 122.622
Br3 C1 Br4 114.757 Br5 C2 Br6 114.757
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.496      
2 C -0.496      
3 Br 0.248      
4 Br 0.248      
5 Br 0.248      
6 Br 0.248      


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 -85.085 0.000 0.000
y 0.000 -79.621 0.000
z 0.000 0.000 -82.288
Traceless
 xyz
x -4.131 0.000 0.000
y 0.000 4.066 0.000
z 0.000 0.000 0.065
Polar
3z2-r20.129
x2-y2-5.465
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.121 0.000 0.000
y 0.000 14.456 0.000
z 0.000 0.000 13.345


<r2> (average value of r2) Å2
<r2> 817.117
(<r2>)1/2 28.585