return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HF/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A1
Energy calculated at HF/Def2TZVPP
 hartrees
Energy at 0K-7755.065029
Energy at 298.15K 
HF Energy-7755.065029
Nuclear repulsion energy784.718427
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 HF/Def2TZVPP
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 337 306 0.04 15.05 0.07 0.13
2 A1 232 210 0.09 0.36 0.28 0.43
3 E 855 775 93.04 6.48 0.75 0.86
3 E 855 775 93.04 6.48 0.75 0.86
4 E 170 154 0.12 2.06 0.75 0.86
4 E 170 154 0.12 2.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1309.1 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 1186.6 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 HF/Def2TZVPP
ABC
0.04147 0.04147 0.02078

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.255
Br2 0.000 1.851 -0.015
Br3 1.603 -0.926 -0.015
Br4 -1.603 -0.926 -0.015

Atom - Atom Distances (Å)
  C1 Br2 Br3 Br4
C11.87081.87081.8708
Br21.87083.20643.2064
Br31.87083.20643.2064
Br41.87083.20643.2064

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 117.954 Br2 C1 Br4 117.954
Br3 C1 Br4 117.953
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.014      
2 Br 0.005      
3 Br 0.005      
4 Br 0.005      


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 -0.045 0.045
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -58.899 0.000 0.000
y 0.000 -58.899 0.000
z 0.000 0.000 -61.292
Traceless
 xyz
x 1.197 0.000 0.000
y 0.000 1.197 0.000
z 0.000 0.000 -2.393
Polar
3z2-r2-4.786
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 11.332 0.000 0.000
y 0.000 11.332 0.000
z 0.000 0.000 6.655


<r2> (average value of r2) Å2
<r2> 397.532
(<r2>)1/2 19.938