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: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-5219.738743
Energy at 298.15K-5219.746351
HF Energy-5219.577464
Nuclear repulsion energy429.326493
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 B2PLYP/6-31G*
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 3275 3109 0.83      
2 A1 1648 1565 29.20      
3 A1 1197 1136 1.97      
4 A1 588 558 9.88      
5 A1 116 110 0.03      
6 A2 898 852 0.00      
7 A2 379 359 0.00      
8 B1 703 667 59.54      
9 B2 3255 3089 13.23      
10 B2 1306 1239 42.49      
11 B2 765 726 58.00      
12 B2 473 449 3.71      

Unscaled Zero Point Vibrational Energy (zpe) 7300.3 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 6929.5 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 B2PLYP/6-31G*
ABC
0.27941 0.03427 0.03053

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.666 1.270
C2 0.000 -0.666 1.270
Br3 0.000 1.741 -0.280
Br4 0.000 -1.741 -0.280
H5 0.000 1.225 2.196
H6 0.000 -1.225 2.196

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.33151.88622.86231.08232.1058
C21.33152.86231.88622.10581.0823
Br31.88622.86233.48132.52933.8639
Br42.86231.88623.48133.86392.5293
H51.08232.10582.52933.86392.4508
H62.10581.08233.86392.52932.4508

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 124.743 C1 C2 H6 121.138
C2 C1 Br3 124.743 C2 C1 H5 121.138
Br3 C1 H5 114.120 Br4 C2 H6 114.120
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.145      
2 C -0.145      
3 Br -0.063      
4 Br -0.063      
5 H 0.209      
6 H 0.209      


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 1.794 1.794
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.954 0.000 0.000
y 0.000 -48.257 0.000
z 0.000 0.000 -41.837
Traceless
 xyz
x -4.908 0.000 0.000
y 0.000 -2.361 0.000
z 0.000 0.000 7.269
Polar
3z2-r214.537
x2-y2-1.698
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.271 0.000 0.000
y 0.000 10.760 0.000
z 0.000 0.000 7.834


<r2> (average value of r2) Å2
<r2> 284.057
(<r2>)1/2 16.854