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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-5197.419594
Energy at 298.15K-5197.427256
HF Energy-5196.976601
Nuclear repulsion energy430.283539
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 MP2/3-21G*
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 3258 3100 0.51      
2 A1 1602 1524 23.03      
3 A1 1241 1180 1.34      
4 A1 607 577 9.72      
5 A1 115 109 0.02      
6 A2 916 871 0.00      
7 A2 382 363 0.00      
8 B1 718 683 70.29      
9 B2 3232 3075 11.80      
10 B2 1356 1290 32.04      
11 B2 784 746 46.33      
12 B2 479 456 2.58      

Unscaled Zero Point Vibrational Energy (zpe) 7344.5 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 6986.8 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 MP2/3-21G*
ABC
0.27061 0.03495 0.03095

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.669 1.293
C2 0.000 -0.669 1.293
Br3 0.000 1.723 -0.285
Br4 0.000 -1.723 -0.285
H5 0.000 1.242 2.213
H6 0.000 -1.242 2.213

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.33861.89702.86541.08372.1210
C21.33862.86541.89702.12101.0837
Br31.89702.86543.44562.54363.8764
Br42.86541.89703.44563.87642.5436
H51.08372.12102.54363.87642.4834
H62.12101.08373.87642.54362.4834

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 123.735 C1 C2 H6 121.885
C2 C1 Br3 123.735 C2 C1 H5 121.885
Br3 C1 H5 114.380 Br4 C2 H6 114.380
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability