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All results from a given calculation for C2Br4 (tetrabromoethene)

using model chemistry: wB97X-D/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 wB97X-D/cc-pVDZ
 hartrees
Energy at 0K-10372.887911
Energy at 298.15K 
HF Energy-10372.887911
Nuclear repulsion energy1479.300215
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/cc-pVDZ
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 1632 1555 0.00 68.73 0.29 0.45
2 Ag 278 265 0.00 10.47 0.16 0.27
3 Ag 151 144 0.00 3.22 0.66 0.79
4 Au 58 55 0.00 0.00 0.00 0.00
5 B1u 656 625 32.38 0.00 0.00 0.00
6 B1u 194 185 0.16 0.00 0.00 0.00
7 B2g 501 477 0.00 1.32 0.75 0.86
8 B2u 798 761 115.77 0.00 0.00 0.00
9 B2u 123 118 0.18 0.00 0.00 0.00
10 B3g 928 884 0.00 0.56 0.75 0.86
11 B3g 219 208 0.00 2.97 0.75 0.86
12 B3u 255 243 2.65 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 2896.9 cm-1
Scaled (by 0.9526) Zero Point Vibrational Energy (zpe) 2759.6 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/cc-pVDZ
ABC
0.02132 0.01845 0.00989

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/cc-pVDZ

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.672
C2 0.000 0.000 -0.672
Br3 0.000 1.583 1.691
Br4 0.000 -1.583 1.691
Br5 0.000 -1.583 -1.691
Br6 0.000 1.583 -1.691

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 Br5 Br6
C11.34451.88241.88242.84452.8445
C21.34452.84452.84451.88241.8824
Br31.88242.84453.16564.63263.3823
Br41.88242.84453.16563.38234.6326
Br52.84451.88244.63263.38233.1656
Br62.84451.88243.38234.63263.1656

picture of tetrabromoethene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br5 122.770 C1 C2 Br6 122.770
C2 C1 Br3 122.770 C2 C1 Br4 122.770
Br3 C1 Br4 114.459 Br5 C2 Br6 114.459
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.157      
2 C -0.157      
3 Br 0.079      
4 Br 0.079      
5 Br 0.079      
6 Br 0.079      


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 -84.586 0.000 0.000
y 0.000 -77.640 0.000
z 0.000 0.000 -80.899
Traceless
 xyz
x -5.317 0.000 0.000
y 0.000 5.102 0.000
z 0.000 0.000 0.214
Polar
3z2-r20.429
x2-y2-6.946
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.764 0.000 0.000
y 0.000 15.532 0.000
z 0.000 0.000 15.649


<r2> (average value of r2) Å2
<r2> 807.184
(<r2>)1/2 28.411