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: HSEh1PBE/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at HSEh1PBE/3-21G*
 hartrees
Energy at 0K-5200.278257
Energy at 298.15K-5200.285974
HF Energy-5200.278257
Nuclear repulsion energy434.520457
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 HSEh1PBE/3-21G*
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 3261 3130 0.31      
2 A1 1658 1592 31.11      
3 A1 1215 1167 0.84      
4 A1 631 606 8.38      
5 A1 114 109 0.01      
6 A2 958 920 0.00      
7 A2 402 386 0.00      
8 B1 722 693 85.76      
9 B2 3235 3106 13.90      
10 B2 1337 1284 27.95      
11 B2 796 764 57.66      
12 B2 493 473 1.35      

Unscaled Zero Point Vibrational Energy (zpe) 7411.2 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 7114.0 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 HSEh1PBE/3-21G*
ABC
0.27691 0.03560 0.03155

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.664 1.277
C2 0.000 -0.664 1.277
Br3 0.000 1.707 -0.282
Br4 0.000 -1.707 -0.282
H5 0.000 1.233 2.197
H6 0.000 -1.233 2.197

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.32711.87522.83671.08292.1086
C21.32712.83671.87522.10861.0829
Br31.87522.83673.41382.52383.8458
Br42.83671.87523.41383.84582.5238
H51.08292.10862.52383.84582.4667
H62.10861.08293.84582.52382.4667

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 123.806 C1 C2 H6 121.747
C2 C1 Br3 123.806 C2 C1 H5 121.747
Br3 C1 H5 114.447 Br4 C2 H6 114.447
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.280      
2 C -0.280      
3 Br 0.010      
4 Br 0.010      
5 H 0.270      
6 H 0.270      


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 1.494 1.494
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.847 0.000 0.000
y 0.000 -46.925 0.000
z 0.000 0.000 -41.285
Traceless
 xyz
x -5.741 0.000 0.000
y 0.000 -1.359 0.000
z 0.000 0.000 7.101
Polar
3z2-r214.201
x2-y2-2.921
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.539 0.000 0.000
y 0.000 10.185 0.000
z 0.000 0.000 7.369


<r2> (average value of r2) Å2
<r2> 275.772
(<r2>)1/2 16.606