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All results from a given calculation for CBr3 (tribromomethyl radical)

using model chemistry: PBE1PBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A1
Energy calculated at PBE1PBE/3-21G
 hartrees
Energy at 0K-7722.937420
Energy at 298.15K 
HF Energy-7722.937420
Nuclear repulsion energy786.380959
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 PBE1PBE/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 320 308 1.09 14.81 0.06 0.11
2 A1 217 208 2.50 0.42 0.49 0.66
3 E 818 786 131.47 0.34 0.75 0.86
3 E 818 786 131.47 0.34 0.75 0.86
4 E 157 151 0.02 2.93 0.75 0.86
4 E 157 151 0.02 2.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1243.7 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 1194.5 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 PBE1PBE/3-21G
ABC
0.04168 0.04168 0.02089

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.290
Br2 0.000 1.846 -0.017
Br3 1.599 -0.923 -0.017
Br4 -1.599 -0.923 -0.017

Atom - Atom Distances (Å)
  C1 Br2 Br3 Br4
C11.87131.87131.8713
Br21.87133.19743.1974
Br31.87133.19743.1974
Br41.87133.19743.1974

picture of tribromomethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 Br3 117.370 Br2 C1 Br4 117.370
Br3 C1 Br4 117.370
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.190      
2 Br 0.063      
3 Br 0.063      
4 Br 0.063      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.399 0.399
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -56.118 0.000 0.000
y 0.000 -56.118 0.000
z 0.000 0.000 -60.156
Traceless
 xyz
x 2.019 0.000 0.000
y 0.000 2.019 0.000
z 0.000 0.000 -4.038
Polar
3z2-r2-8.076
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.954 0.000 0.000
y 0.000 9.954 0.000
z 0.000 0.000 4.497


<r2> (average value of r2) Å2
<r2> 394.237
(<r2>)1/2 19.855