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

using model chemistry: QCISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at QCISD/6-31G
 hartrees
Energy at 0K-5178.060323
Energy at 298.15K 
HF Energy-5177.889021
Nuclear repulsion energy327.006279
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/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
A' 3257 3138 0.82      
A' 558 538 12.65      
A' 353 340 41.67      
A' 173 167 0.12      
A" 1192 1148 65.57      
A" 709 683 85.46      

Unscaled Zero Point Vibrational Energy (zpe) 3120.6 cm-1
Scaled (by 0.9636) Zero Point Vibrational Energy (zpe) 3007.0 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/6-31G
ABC
1.19013 0.03844 0.03726

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.864 0.000
H2 -0.407 1.868 0.000
Br3 0.005 -0.101 1.667
Br4 0.005 -0.101 -1.667

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08551.92561.9256
H21.08552.61212.6121
Br31.92562.61213.3332
Br41.92562.61213.3332

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 117.602 H2 C1 Br4 117.602
Br3 C1 Br4 119.879
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability