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

using model chemistry: CCSD/cc-pVTZ-PP

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/cc-pVTZ-PP
 hartrees
Energy at 0K-870.040592
Energy at 298.15K 
HF Energy-869.424517
Nuclear repulsion energy202.038419
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/cc-pVTZ-PP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
A' 3253 3103 0.68      
A' 633 604 5.46      
A' 421 402 23.77      
A' 187 179 0.13      
A" 1203 1147 63.33      
A" 810 772 92.51      

Unscaled Zero Point Vibrational Energy (zpe) 3253.2 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 3103.5 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/cc-pVTZ-PP
ABC
1.28573 0.04139 0.04013

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.828 0.000
H2 -0.448 1.804 0.000
Br3 0.006 -0.097 1.606
Br4 0.006 -0.097 -1.606

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.07701.85311.8531
H21.07702.52972.5297
Br31.85312.52973.2122
Br41.85312.52973.2122

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 116.893 H2 C1 Br4 116.893
Br3 C1 Br4 120.156
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability