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

using model chemistry: MP3=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 2A1
Energy calculated at MP3=FULL/6-31G*
 hartrees
Energy at 0K-7748.025554
Energy at 298.15K 
HF Energy-7747.469699
Nuclear repulsion energy783.781114
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 MP3=FULL/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 A1 356 334 0.31      
2 A1 243 228 0.25      
3 E 787 739 117.91      
3 E 787 739 117.91      
4 E 168 157 0.01      
4 E 168 157 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 1254.3 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 1176.9 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 MP3=FULL/6-31G*
ABC
0.04145 0.04145 0.02080

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.332
Br2 0.000 1.850 -0.019
Br3 1.603 -0.925 -0.019
Br4 -1.603 -0.925 -0.019

Atom - Atom Distances (Å)
  C1 Br2 Br3 Br4
C11.88351.88351.8835
Br21.88353.20503.2050
Br31.88353.20503.2050
Br41.88353.20503.2050

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 116.601 Br2 C1 Br4 116.601
Br3 C1 Br4 116.601
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability