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: CCSD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A1
Energy calculated at CCSD/6-31G(2df,p)
 hartrees
Energy at 0K-5217.665945
Energy at 298.15K-5217.673644
HF Energy-5217.012711
Nuclear repulsion energy434.105246
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 CCSD/6-31G(2df,p)
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 3275 3097 0.27      
2 A1 1668 1577 18.89      
3 A1 1207 1141 1.49      
4 A1 625 591 6.61      
5 A1 116 110 0.06      
6 A2 931 880 0.00      
7 A2 389 368 0.00      
8 B1 715 676 47.17      
9 B2 3253 3076 13.91      
10 B2 1317 1246 35.40      
11 B2 803 759 41.15      
12 B2 486 460 1.10      

Unscaled Zero Point Vibrational Energy (zpe) 7392.4 cm-1
Scaled (by 0.9455) Zero Point Vibrational Energy (zpe) 6989.5 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 CCSD/6-31G(2df,p)
ABC
0.28777 0.03494 0.03116

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.665 1.248
C2 0.000 -0.665 1.248
Br3 0.000 1.724 -0.276
Br4 0.000 -1.724 -0.276
H5 0.000 1.212 2.182
H6 0.000 -1.212 2.182

Atom - Atom Distances (Å)
  C1 C2 Br3 Br4 H5 H6
C11.33051.85602.83391.08142.0962
C21.33052.83391.85602.09621.0814
Br31.85602.83393.44702.51063.8284
Br42.83391.85603.44703.82842.5106
H51.08142.09622.51063.82842.4235
H62.09621.08143.82842.51062.4235

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 124.764 C1 C2 H6 120.355
C2 C1 Br3 124.764 C2 C1 H5 120.355
Br3 C1 H5 114.881 Br4 C2 H6 114.881
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability