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 CHBr2 (dibromomethyl radical)

using model chemistry: CCSD/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CCSD/aug-cc-pVTZ
 hartrees
Energy at 0K-5183.972125
Energy at 298.15K 
HF Energy-5183.335062
Nuclear repulsion energy339.415323
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/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
A' 3254 3110 1.02      
A' 634 606 4.68      
A' 420 401 21.34      
A' 189 180 0.12      
A" 1206 1153 60.71      
A" 812 777 90.41      

Unscaled Zero Point Vibrational Energy (zpe) 3257.4 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 3113.4 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 CCSD/aug-cc-pVTZ
ABC
1.28851 0.04140 0.04014

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.826 0.000
H2 -0.444 1.805 0.000
Br3 0.006 -0.097 1.606
Br4 0.006 -0.097 -1.606

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.07691.85231.8523
H21.07692.52932.5293
Br31.85232.52933.2118
Br41.85232.52933.2118

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 116.923 H2 C1 Br4 116.923
Br3 C1 Br4 120.220
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability