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: HF/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at HF/6-311+G(3df,2p)
 hartrees
Energy at 0K-5221.641266
Energy at 298.15K-5221.649083
HF Energy-5221.641266
Nuclear repulsion energy427.863589
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 HF/6-311+G(3df,2p)
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 3377 3069 0.27      
2 A1 1781 1619 31.70      
3 A1 1291 1173 2.88      
4 A1 621 564 8.84      
5 A1 118 107 0.09      
6 A2 1051 955 0.00      
7 A2 420 382 0.00      
8 B1 773 703 60.61      
9 B2 3352 3046 18.88      
10 B2 1403 1275 64.24      
11 B2 819 744 61.97      
12 B2 508 461 3.52      

Unscaled Zero Point Vibrational Energy (zpe) 7757.0 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 7048.0 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 HF/6-311+G(3df,2p)
ABC
0.29504 0.03320 0.02984

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.654 1.232
C2 0.000 -0.654 1.232
Br3 0.000 1.770 -0.273
Br4 0.000 -1.770 -0.273
H5 0.000 1.190 2.159
H6 0.000 -1.190 2.159

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.30781.87402.85351.07032.0635
C21.30782.85351.87402.06351.0703
Br31.87402.85353.54062.49983.8309
Br42.85351.87403.54063.83092.4998
H51.07032.06352.49983.83092.3801
H62.06351.07033.83092.49982.3801

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 126.564 C1 C2 H6 120.062
C2 C1 Br3 126.564 C2 C1 H5 120.062
Br3 C1 H5 113.374 Br4 C2 H6 113.374
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.070      
2 C -0.070      
3 Br -0.077      
4 Br -0.077      
5 H 0.148      
6 H 0.148      


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 1.976 1.976
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -51.035 0.000 0.000
y 0.000 -49.660 0.000
z 0.000 0.000 -42.883
Traceless
 xyz
x -4.763 0.000 0.000
y 0.000 -2.701 0.000
z 0.000 0.000 7.464
Polar
3z2-r214.928
x2-y2-1.374
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.893 0.000 0.000
y 0.000 12.788 0.000
z 0.000 0.000 9.132


<r2> (average value of r2) Å2
<r2> 289.985
(<r2>)1/2 17.029