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

using model chemistry: CBS-Q

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-5222.987579
Energy at 298.15K-5222.982083
HF Energy-5216.815430
Nuclear repulsion energy430.213556
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 CBS-Q
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 3417 3417 2.58      
2 A1 1814 1814 30.72      
3 A1 1298 1298 3.32      
4 A1 635 635 11.45      
5 A1 121 121 0.09      
6 A2 1053 1053 0.00      
7 A2 423 423 0.00      
8 B1 787 787 62.40      
9 B2 3392 3392 13.83      
10 B2 1414 1414 58.85      
11 B2 831 831 63.70      
12 B2 512 512 3.87      

Unscaled Zero Point Vibrational Energy (zpe) 7847.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7847.3 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 CBS-Q
ABC
0.28481 0.03460 0.03085

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.657 1.242
C2 0.000 -0.657 1.242
Br3 0.000 1.751 -0.275
Br4 0.000 -1.751 -0.275
H5 0.000 1.200 2.169
H6 0.000 -1.200 2.169

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.31461.86992.84601.07452.0761
C21.31462.84601.86992.07611.0745
Br31.86992.84603.50172.50533.8317
Br42.84601.86993.50173.83172.5053
H51.07452.07612.50533.83172.4005
H62.07611.07453.83172.50532.4005

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 120.351
C2 C1 Br3 125.790 C2 C1 H5 120.351
Br3 C1 H5 113.860 Br4 C2 H6 113.860
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability