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

using model chemistry: ROHF/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 ROHF/cc-pVTZ
 hartrees
Energy at 0K-5183.328878
Energy at 298.15K 
HF Energy-5183.328878
Nuclear repulsion energy337.304927
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 ROHF/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' 3363 3030 1.16      
A' 699 630 14.32      
A' 578 521 6.83      
A' 195 175 0.08      
A" 1286 1158 76.74      
A" 823 742 99.87      

Unscaled Zero Point Vibrational Energy (zpe) 3471.9 cm-1
Scaled (by 0.901) Zero Point Vibrational Energy (zpe) 3128.2 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 ROHF/cc-pVTZ
ABC
1.25370 0.04096 0.03971

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.846 0.000
H2 -0.558 1.754 0.000
Br3 0.007 -0.098 1.614
Br4 0.007 -0.098 -1.614

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.06941.86991.8699
H21.06942.52072.5207
Br31.86992.52073.2286
Br41.86992.52073.2286

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 115.369 H2 C1 Br4 115.369
Br3 C1 Br4 119.373
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.098      
2 H 0.171      
3 Br -0.037      
4 Br -0.037      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.456 0.977 0.000 1.078
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.633 -0.978 0.000
y -0.978 -40.840 0.000
z 0.000 0.000 -42.726
Traceless
 xyz
x -1.850 -0.978 0.000
y -0.978 2.340 0.000
z 0.000 0.000 -0.490
Polar
3z2-r2-0.979
x2-y2-2.793
xy-0.978
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 217.250
(<r2>)1/2 14.739