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

using model chemistry: PBEPBEultrafine/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-5181.189045
Energy at 298.15K 
HF Energy-5181.189045
Nuclear repulsion energy336.508446
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 PBEPBEultrafine/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3162 3110 1.29 101.09 0.28 0.44
2 A' 619 609 10.59 5.78 0.35 0.52
3 A' 440 433 24.32 14.45 0.08 0.15
4 A' 185 182 0.05 4.14 0.48 0.65
5 A" 1151 1132 48.62 3.15 0.75 0.86
6 A" 733 721 139.74 1.90 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3144.9 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 3093.0 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 PBEPBEultrafine/6-31G*
ABC
1.23093 0.04085 0.03958

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.851 0.000
H2 -0.552 1.789 0.000
Br3 0.007 -0.099 1.616
Br4 0.007 -0.099 -1.616

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.09181.87491.8749
H21.09182.54732.5473
Br31.87492.54733.2329
Br41.87492.54733.2329

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 115.793 H2 C1 Br4 115.793
Br3 C1 Br4 119.122
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.208      
2 H 0.222      
3 Br -0.007      
4 Br -0.007      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.540 0.545 0.000 0.767
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.736 -1.061 0.000
y -1.061 -40.191 0.000
z 0.000 0.000 -40.417
Traceless
 xyz
x -2.432 -1.061 0.000
y -1.061 1.385 0.000
z 0.000 0.000 1.047
Polar
3z2-r22.094
x2-y2-2.545
xy-1.061
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.015 -0.213 0.000
y -0.213 5.324 0.000
z 0.000 0.000 10.102


<r2> (average value of r2) Å2
<r2> 217.121
(<r2>)1/2 14.735