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: LSDA/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 LSDA/3-21G
 hartrees
Energy at 0K-5194.958358
Energy at 298.15K-5194.966044
HF Energy-5194.958358
Nuclear repulsion energy441.225299
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 LSDA/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 3171 3119 0.18      
2 A1 1621 1594 32.68      
3 A1 1155 1136 0.22      
4 A1 647 636 8.11      
5 A1 115 113 0.00      
6 A2 900 885 0.00      
7 A2 397 390 0.00      
8 B1 686 675 88.56      
9 B2 3146 3095 17.44      
10 B2 1274 1253 17.57      
11 B2 790 777 58.18      
12 B2 488 480 0.86      

Unscaled Zero Point Vibrational Energy (zpe) 7194.6 cm-1
Scaled (by 0.9836) Zero Point Vibrational Energy (zpe) 7076.6 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 LSDA/3-21G
ABC
0.27368 0.03741 0.03291

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.665 1.284
C2 0.000 -0.665 1.284
Br3 0.000 1.664 -0.283
Br4 0.000 -1.664 -0.283
H5 0.000 1.249 2.207
H6 0.000 -1.249 2.207

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.32931.85902.80701.09242.1248
C21.32932.80701.85902.12481.0924
Br31.85902.80703.32752.52483.8326
Br42.80701.85903.32753.83262.5248
H51.09242.12482.52483.83262.4987
H62.12481.09243.83262.52482.4987

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 122.509 C1 C2 H6 122.357
C2 C1 Br3 122.509 C2 C1 H5 122.357
Br3 C1 H5 115.134 Br4 C2 H6 115.134
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.269      
2 C -0.269      
3 Br 0.009      
4 Br 0.009      
5 H 0.260      
6 H 0.260      


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 1.376 1.376
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.525 0.000 0.000
y 0.000 -46.499 0.000
z 0.000 0.000 -41.078
Traceless
 xyz
x -5.736 0.000 0.000
y 0.000 -1.198 0.000
z 0.000 0.000 6.934
Polar
3z2-r213.867
x2-y2-3.025
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.518 0.000 0.000
y 0.000 10.116 0.000
z 0.000 0.000 7.505


<r2> (average value of r2) Å2
<r2> 265.893
(<r2>)1/2 16.306