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: PBEPBEultrafine/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 PBEPBEultrafine/6-311+G(3df,2p)
 hartrees
Energy at 0K-5224.788591
Energy at 298.15K-5224.796134
HF Energy-5224.788591
Nuclear repulsion energy426.452639
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 PBEPBEultrafine/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 3143 3143 0.00      
2 A1 1579 1579 35.79      
3 A1 1132 1132 1.10      
4 A1 581 581 7.11      
5 A1 103 103 0.02      
6 A2 850 850 0.00      
7 A2 373 373 0.00      
8 B1 655 655 57.74      
9 B2 3121 3121 16.36      
10 B2 1231 1231 42.17      
11 B2 744 744 66.62      
12 B2 468 468 2.37      

Unscaled Zero Point Vibrational Energy (zpe) 6990.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6990.3 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 PBEPBEultrafine/6-311+G(3df,2p)
ABC
0.28728 0.03326 0.02981

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.666 1.249
C2 0.000 -0.666 1.249
Br3 0.000 1.768 -0.277
Br4 0.000 -1.768 -0.277
H5 0.000 1.222 2.185
H6 0.000 -1.222 2.185

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.33291.88162.87271.08882.1082
C21.33292.87271.88162.10821.0888
Br31.88162.87273.53542.52153.8732
Br42.87271.88163.53543.87322.5215
H51.08882.10822.52153.87322.4449
H62.10821.08883.87322.52152.4449

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 125.821 C1 C2 H6 120.709
C2 C1 Br3 125.821 C2 C1 H5 120.709
Br3 C1 H5 113.469 Br4 C2 H6 113.469
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.095      
2 C -0.095      
3 Br -0.041      
4 Br -0.041      
5 H 0.135      
6 H 0.135      


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 1.552 1.552
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.592 0.000 0.000
y 0.000 -48.728 0.000
z 0.000 0.000 -42.990
Traceless
 xyz
x -4.733 0.000 0.000
y 0.000 -1.937 0.000
z 0.000 0.000 6.670
Polar
3z2-r213.340
x2-y2-1.864
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.363 0.000 0.000
y 0.000 13.924 0.000
z 0.000 0.000 10.037


<r2> (average value of r2) Å2
<r2> 290.303
(<r2>)1/2 17.038