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All results from a given calculation for CHBrCHBr (Ethene, 1,2-dibromo-, (Z)-)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-5200.985017
Energy at 298.15K-5200.992711
HF Energy-5200.985017
Nuclear repulsion energy433.411521
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 B3PW91/3-21G*
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 3247 3115 0.52      
2 A1 1645 1578 31.65      
3 A1 1212 1162 0.88      
4 A1 623 598 8.50      
5 A1 111 107 0.01      
6 A2 948 909 0.00      
7 A2 398 381 0.00      
8 B1 716 687 85.26      
9 B2 3222 3091 12.92      
10 B2 1332 1278 28.81      
11 B2 789 757 58.50      
12 B2 489 469 1.51      

Unscaled Zero Point Vibrational Energy (zpe) 7364.8 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 7065.7 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 B3PW91/3-21G*
ABC
0.27674 0.03535 0.03135

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

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 1.713 -0.282
Br4 0.000 -1.713 -0.282
H5 0.000 1.234 2.198
H6 0.000 -1.234 2.198

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.32861.87862.84271.08352.1104
C21.32862.84271.87862.11041.0835
Br31.87862.84273.42602.52573.8519
Br42.84271.87863.42603.85192.5257
H51.08352.11042.52573.85192.4689
H62.11041.08353.85192.52572.4689

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 123.936 C1 C2 H6 121.750
C2 C1 Br3 123.936 C2 C1 H5 121.750
Br3 C1 H5 114.314 Br4 C2 H6 114.314
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.277      
2 C -0.277      
3 Br 0.009      
4 Br 0.009      
5 H 0.268      
6 H 0.268      


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 1.503 1.503
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -49.723 0.000 0.000
y 0.000 -46.828 0.000
z 0.000 0.000 -41.191
Traceless
 xyz
x -5.713 0.000 0.000
y 0.000 -1.371 0.000
z 0.000 0.000 7.085
Polar
3z2-r214.169
x2-y2-2.895
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.535 0.000 0.000
y 0.000 10.229 0.000
z 0.000 0.000 7.392


<r2> (average value of r2) Å2
<r2> 277.215
(<r2>)1/2 16.650