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

using model chemistry: CCD/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 CCD/3-21G
 hartrees
Energy at 0K-5196.830304
Energy at 298.15K-5196.837961
HF Energy-5196.546825
Nuclear repulsion energy417.473302
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 CCD/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 3241 3151 3.30      
2 A1 1672 1626 18.77      
3 A1 1230 1196 2.54      
4 A1 551 535 5.92      
5 A1 111 108 0.03      
6 A2 1016 988 0.00      
7 A2 398 387 0.00      
8 B1 750 729 77.18      
9 B2 3214 3125 4.94      
10 B2 1353 1316 46.63      
11 B2 752 731 36.24      
12 B2 468 455 1.68      

Unscaled Zero Point Vibrational Energy (zpe) 7378.2 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 7173.8 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 CCD/3-21G
ABC
0.27323 0.03194 0.02859

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.663 1.284
C2 0.000 -0.663 1.284
Br3 0.000 1.805 -0.284
Br4 0.000 -1.805 -0.284
H5 0.000 1.218 2.216
H6 0.000 -1.218 2.216

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.32701.93952.92441.08452.0999
C21.32702.92441.93952.09991.0845
Br31.93952.92443.61012.56763.9230
Br42.92441.93953.61013.92302.5676
H51.08452.09992.56763.92302.4368
H62.09991.08453.92302.56762.4368

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 126.057 C1 C2 H6 120.778
C2 C1 Br3 126.057 C2 C1 H5 120.778
Br3 C1 H5 113.165 Br4 C2 H6 113.165
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability