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

using model chemistry: B1B95/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A1
Energy calculated at B1B95/STO-3G
 hartrees
Energy at 0K-7676.836144
Energy at 298.15K 
HF Energy-7676.836144
Nuclear repulsion energy777.323042
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 B1B95/STO-3G
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 333 294 0.02 10.70 0.10 0.18
2 A1 238 211 0.04 0.18 0.12 0.21
3 E 914 807 168.06 0.47 0.75 0.86
3 E 913 807 168.15 0.47 0.75 0.86
4 E 171 151 0.38 2.74 0.75 0.86
4 E 171 151 0.38 2.74 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 1370.2 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 1209.9 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 B1B95/STO-3G
ABC
0.04070 0.04070 0.02039

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.266
Br2 0.000 1.869 -0.015
Br3 1.618 -0.934 -0.015
Br4 -1.618 -0.934 -0.015

Atom - Atom Distances (Å)
  C1 Br2 Br3 Br4
C11.88951.88951.8895
Br21.88953.23643.2364
Br31.88953.23643.2364
Br41.88953.23643.2364

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 117.830 Br2 C1 Br4 117.830
Br3 C1 Br4 117.830
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.197      
2 Br 0.066      
3 Br 0.066      
4 Br 0.066      


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 -0.194 0.194
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -54.571 0.000 0.000
y 0.000 -54.571 0.000
z 0.000 0.000 -54.362
Traceless
 xyz
x -0.105 0.000 0.000
y 0.000 -0.105 0.000
z 0.000 0.000 0.210
Polar
3z2-r20.419
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 5.148 0.000 0.000
y 0.000 5.149 0.000
z 0.000 0.000 0.734


<r2> (average value of r2) Å2
<r2> 401.093
(<r2>)1/2 20.027