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: BLYP/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 BLYP/6-311+G(3df,2p)
 hartrees
Energy at 0K-5225.684218
Energy at 298.15K-5225.691717
HF Energy-5225.684218
Nuclear repulsion energy421.227126
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 BLYP/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 3133 3115 0.06      
2 A1 1558 1550 37.02      
3 A1 1145 1139 1.65      
4 A1 548 545 7.81      
5 A1 103 102 0.02      
6 A2 851 847 0.00      
7 A2 370 368 0.00      
8 B1 655 652 56.32      
9 B2 3110 3093 14.82      
10 B2 1241 1234 50.97      
11 B2 722 718 69.00      
12 B2 454 452 4.29      

Unscaled Zero Point Vibrational Energy (zpe) 6945.3 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 6907.1 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 BLYP/6-311+G(3df,2p)
ABC
0.28449 0.03224 0.02896

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.666 1.256
C2 0.000 -0.666 1.256
Br3 0.000 1.796 -0.278
Br4 0.000 -1.796 -0.278
H5 0.000 1.222 2.189
H6 0.000 -1.222 2.189

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.33221.90532.90101.08602.1059
C21.33222.90101.90532.10591.0860
Br31.90532.90103.59212.53323.8981
Br42.90101.90533.59213.89812.5332
H51.08602.10592.53323.89812.4436
H62.10591.08603.89812.53322.4436

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 126.372 C1 C2 H6 120.776
C2 C1 Br3 126.372 C2 C1 H5 120.776
Br3 C1 H5 112.852 Br4 C2 H6 112.852
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.144      
2 C -0.144      
3 Br -0.022      
4 Br -0.022      
5 H 0.166      
6 H 0.166      


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 1.588 1.588
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.883 0.000 0.000
y 0.000 -49.293 0.000
z 0.000 0.000 -43.385
Traceless
 xyz
x -4.544 0.000 0.000
y 0.000 -2.159 0.000
z 0.000 0.000 6.703
Polar
3z2-r213.405
x2-y2-1.590
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.466 0.000 0.000
y 0.000 14.197 0.000
z 0.000 0.000 10.160


<r2> (average value of r2) Å2
<r2> 297.936
(<r2>)1/2 17.261