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

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-5197.451918
Energy at 298.15K-5197.459551
HF Energy-5196.976283
Nuclear repulsion energy428.106042
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/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 3213 3088 1.87      
2 A1 1620 1557 18.84      
3 A1 1231 1183 1.99      
4 A1 594 570 7.74      
5 A1 114 109 0.03      
6 A2 922 886 0.00      
7 A2 375 361 0.00      
8 B1 711 683 64.18      
9 B2 3187 3063 8.90      
10 B2 1349 1296 32.64      
11 B2 776 746 38.31      
12 B2 471 453 1.89      

Unscaled Zero Point Vibrational Energy (zpe) 7280.2 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 6997.0 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/3-21G*
ABC
0.26967 0.03450 0.03059

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.669 1.295
C2 0.000 -0.669 1.295
Br3 0.000 1.734 -0.285
Br4 0.000 -1.734 -0.285
H5 0.000 1.243 2.217
H6 0.000 -1.243 2.217

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.33781.90592.87621.08652.1228
C21.33782.87621.90592.12281.0865
Br31.90592.87623.46872.55043.8895
Br42.87621.90593.46873.88952.5504
H51.08652.12282.55043.88952.4861
H62.12281.08653.88952.55042.4861

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 123.991 C1 C2 H6 121.900
C2 C1 Br3 123.991 C2 C1 H5 121.900
Br3 C1 H5 114.109 Br4 C2 H6 114.109
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability