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: MP2=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at MP2=FULL/6-31+G**
 hartrees
Energy at 0K-5217.243145
Energy at 298.15K-5217.250790
HF Energy-5216.679388
Nuclear repulsion energy429.252864
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 MP2=FULL/6-31+G**
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 3310 3109 0.26      
2 A1 1643 1543 28.54      
3 A1 1219 1145 1.35      
4 A1 597 561 7.39      
5 A1 107 100 0.04      
6 A2 899 844 0.00      
7 A2 395 371 0.00      
8 B1 708 665 70.02      
9 B2 3288 3088 18.27      
10 B2 1325 1245 43.59      
11 B2 766 720 61.16      
12 B2 484 454 1.77      

Unscaled Zero Point Vibrational Energy (zpe) 7370.3 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 6922.2 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 MP2=FULL/6-31+G**
ABC
0.28787 0.03384 0.03028

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.668 1.248
C2 0.000 -0.668 1.248
Br3 0.000 1.752 -0.276
Br4 0.000 -1.752 -0.276
H5 0.000 1.211 2.181
H6 0.000 -1.211 2.181

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.33561.87072.86001.07952.0978
C21.33562.86001.87072.09781.0795
Br31.87072.86003.50412.51603.8495
Br42.86001.87073.50413.84952.5160
H51.07952.09782.51603.84952.4225
H62.09781.07953.84952.51602.4225

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 125.422 C1 C2 H6 120.228
C2 C1 Br3 125.422 C2 C1 H5 120.228
Br3 C1 H5 114.350 Br4 C2 H6 114.350
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability