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-, (E)-)

using model chemistry: MP2/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1AG
Energy calculated at MP2/cc-pVTZ
 hartrees
Energy at 0K-5222.590995
Energy at 298.15K-5222.598349
HF Energy-5221.818972
Nuclear repulsion energy390.321349
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/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 Ag 3262 3097 0.00      
2 Ag 1613 1532 0.00      
3 Ag 1291 1225 0.00      
4 Ag 780 741 0.00      
5 Ag 226 215 0.00      
6 Au 947 899 54.18      
7 Au 176 167 0.01      
8 Bg 761 723 0.00      
9 Bu 3257 3093 15.42      
10 Bu 1196 1136 37.25      
11 Bu 729 692 60.79      
12 Bu 199 189 1.58      

Unscaled Zero Point Vibrational Energy (zpe) 7218.7 cm-1
Scaled (by 0.9495) Zero Point Vibrational Energy (zpe) 6854.2 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/cc-pVTZ
ABC
1.71418 0.02028 0.02004

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/cc-pVTZ

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.380 0.546 0.000
C2 0.380 -0.546 0.000
Br3 0.380 2.255 0.000
Br4 -0.380 -2.255 0.000
H5 -1.458 0.523 0.000
H6 1.458 -0.523 0.000

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.33041.87062.80151.07842.1261
C21.33042.80151.87062.12611.0784
Br31.87062.80154.57442.52582.9802
Br42.80151.87064.57442.98022.5258
H51.07842.12612.52582.98023.0979
H62.12611.07842.98022.52583.0979

picture of Ethene, 1,2-dibromo-, (E)- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br4 121.217 C1 C2 H6 123.589
C2 C1 Br3 121.217 C2 C1 H5 123.589
Br3 C1 H5 115.195 Br4 C2 H6 115.195
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability