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: QCISD/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 QCISD/6-311+G(3df,2p)
 hartrees
Energy at 0K-5222.325258
Energy at 298.15K-5222.332907
HF Energy-5221.640554
Nuclear repulsion energy428.115384
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 QCISD/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 3244 3094 0.21      
2 A1 1649 1573 25.45      
3 A1 1198 1142 2.22      
4 A1 602 574 6.17      
5 A1 111 106 0.05      
6 A2 916 873 0.00      
7 A2 380 362 0.00      
8 B1 695 663 53.25      
9 B2 3220 3071 15.51      
10 B2 1308 1247 45.66      
11 B2 779 742 49.03      
12 B2 479 457 1.48      

Unscaled Zero Point Vibrational Energy (zpe) 7289.6 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 6952.1 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 QCISD/6-311+G(3df,2p)
ABC
0.28862 0.03355 0.03006

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.664 1.246
C2 0.000 -0.664 1.246
Br3 0.000 1.760 -0.276
Br4 0.000 -1.760 -0.276
H5 0.000 1.208 2.180
H6 0.000 -1.208 2.180

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.32861.87552.86251.08032.0920
C21.32862.86251.87552.09201.0803
Br31.87552.86253.51992.51723.8521
Br42.86251.87553.51993.85212.5172
H51.08032.09202.51723.85212.4155
H62.09201.08033.85212.51722.4155

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 125.746 C1 C2 H6 120.203
C2 C1 Br3 125.746 C2 C1 H5 120.203
Br3 C1 H5 114.051 Br4 C2 H6 114.051
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability