return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CHBrCHBr (Ethene, 1,2-dibromo-, (Z)-)

using model chemistry: TPSSh/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at TPSSh/6-311G*
 hartrees
Energy at 0K-5225.469590
Energy at 298.15K-5225.477181
HF Energy-5225.469590
Nuclear repulsion energy426.498344
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 TPSSh/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3222 3103 2.72      
2 A1 1625 1566 38.99      
3 A1 1189 1145 1.72      
4 A1 587 565 9.24      
5 A1 105 101 0.03      
6 A2 880 848 0.00      
7 A2 377 363 0.00      
8 B1 684 658 77.71      
9 B2 3199 3082 10.86      
10 B2 1297 1249 47.58      
11 B2 762 734 76.34      
12 B2 476 458 2.69      

Unscaled Zero Point Vibrational Energy (zpe) 7201.2 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 6936.2 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 TPSSh/6-311G*
ABC
0.28769 0.03324 0.02980

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.665 1.249
C2 0.000 -0.665 1.249
Br3 0.000 1.768 -0.276
Br4 0.000 -1.768 -0.276
H5 0.000 1.218 2.180
H6 0.000 -1.218 2.180

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.32941.88252.87151.08272.1000
C21.32942.87151.88252.10001.0827
Br31.88252.87153.53642.51693.8663
Br42.87151.88253.53643.86632.5169
H51.08272.10002.51693.86632.4355
H62.10001.08273.86632.51692.4355

picture of Ethene, 1,2-dibromo-, (Z)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br4 125.886 C1 C2 H6 120.717
C2 C1 Br3 125.886 C2 C1 H5 120.717
Br3 C1 H5 113.397 Br4 C2 H6 113.397
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.297      
2 C -0.297      
3 Br 0.034      
4 Br 0.034      
5 H 0.263      
6 H 0.263      


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 1.719 1.719
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.918 0.000 0.000
y 0.000 11.270 0.000
z 0.000 0.000 7.967


<r2> (average value of r2) Å2
<r2> 290.009
(<r2>)1/2 17.030