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/aug-cc-pVTZ

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/aug-cc-pVTZ
 hartrees
Energy at 0K-5224.946129
Energy at 298.15K-5224.953664
HF Energy-5224.946129
Nuclear repulsion energy426.414983
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/aug-cc-pVTZ
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 3144 3109 0.00      
2 A1 1576 1559 36.51      
3 A1 1130 1118 1.18      
4 A1 574 568 7.23      
5 A1 102 101 0.02      
6 A2 849 840 0.00      
7 A2 374 370 0.00      
8 B1 656 649 57.03      
9 B2 3122 3088 16.14      
10 B2 1233 1219 42.51      
11 B2 738 729 65.81      
12 B2 464 458 2.85      

Unscaled Zero Point Vibrational Energy (zpe) 6981.1 cm-1
Scaled (by 0.9888) Zero Point Vibrational Energy (zpe) 6902.9 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/aug-cc-pVTZ
ABC
0.28680 0.03327 0.02981

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/aug-cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.666 1.250
C2 0.000 -0.666 1.250
Br3 0.000 1.767 -0.277
Br4 0.000 -1.767 -0.277
H5 0.000 1.222 2.187
H6 0.000 -1.222 2.187

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.33281.88252.87311.08862.1076
C21.33282.87311.88252.10761.0886
Br31.88252.87313.53462.52303.8734
Br42.87311.88253.53463.87342.5230
H51.08862.10762.52303.87342.4436
H62.10761.08863.87342.52302.4436

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 125.790 C1 C2 H6 120.676
C2 C1 Br3 125.790 C2 C1 H5 120.676
Br3 C1 H5 113.535 Br4 C2 H6 113.535
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.374      
2 C -0.374      
3 Br 0.103      
4 Br 0.103      
5 H 0.271      
6 H 0.271      


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 1.540 1.540
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.535 0.000 0.000
y 0.000 -48.815 0.000
z 0.000 0.000 -43.045
Traceless
 xyz
x -4.605 0.000 0.000
y 0.000 -2.025 0.000
z 0.000 0.000 6.630
Polar
3z2-r213.259
x2-y2-1.720
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.575 0.000 0.000
y 0.000 14.150 0.000
z 0.000 0.000 10.250


<r2> (average value of r2) Å2
<r2> 290.284
(<r2>)1/2 17.038