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

using model chemistry: QCISD(T)=FULL/cc-pVDZ

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(T)=FULL/cc-pVDZ
 hartrees
Energy at 0K-5183.597608
Energy at 298.15K 
HF Energy-5183.166553
Nuclear repulsion energy335.121118
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(T)=FULL/cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
A' 3222 3090        
A' 623 598        
A' 462 443        
A' 185 177        
A" 1178 1130        
A" 779 747        

Unscaled Zero Point Vibrational Energy (zpe) 3225.1 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 3092.8 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(T)=FULL/cc-pVDZ
ABC
1.24987 0.04039 0.03916

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.841 0.000
H2 -0.512 1.806 0.000
Br3 0.007 -0.098 1.626
Br4 0.007 -0.098 -1.626

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.09551.87751.8775
H21.09552.55682.5568
Br31.87752.55683.2516
Br41.87752.55683.2516

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 116.134 H2 C1 Br4 116.134
Br3 C1 Br4 119.977
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability