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All results from a given calculation for CHBr2 (dibromomethyl radical)

using model chemistry: CISD/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CISD/Def2TZVPP
 hartrees
Energy at 0K-5183.854138
Energy at 298.15K 
HF Energy-5183.241780
Nuclear repulsion energy340.405176
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 CISD/Def2TZVPP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
A' 3350 3350 1.07      
A' 651 651 5.94      
A' 428 428 21.16      
A' 194 194 0.15      
A" 1252 1252 69.18      
A" 845 845 90.70      

Unscaled Zero Point Vibrational Energy (zpe) 3360.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 3360.4 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 CISD/Def2TZVPP
ABC
1.30706 0.04159 0.04034

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.820 0.000
H2 -0.432 1.796 0.000
Br3 0.006 -0.096 1.602
Br4 0.006 -0.096 -1.602

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.06921.84561.8456
H21.06922.51742.5174
Br31.84562.51743.2044
Br41.84562.51743.2044

picture of dibromomethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 Br3 116.937 H2 C1 Br4 116.937
Br3 C1 Br4 120.475
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability