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

using model chemistry: QCISD(T)/aug-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)/aug-cc-pVDZ
 hartrees
Energy at 0K-5183.620650
Energy at 298.15K 
HF Energy-5183.174503
Nuclear repulsion energy335.173798
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)/aug-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' 3194 3123        
A' 630 616        
A' 485 474        
A' 185 181        
A" 1174 1148        
A" 767 750        

Unscaled Zero Point Vibrational Energy (zpe) 3217.2 cm-1
Scaled (by 0.9778) Zero Point Vibrational Energy (zpe) 3145.8 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)/aug-cc-pVDZ
ABC
1.22990 0.04049 0.03924

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.851 0.000
H2 -0.552 1.793 0.000
Br3 0.007 -0.099 1.624
Br4 0.007 -0.099 -1.624

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.09521.88101.8810
H21.09522.55472.5547
Br31.88102.55473.2473
Br41.88102.55473.2473

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 115.727 H2 C1 Br4 115.727
Br3 C1 Br4 119.351
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability