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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G*
 hartrees
Energy at 0K-5178.561824
Energy at 298.15K 
HF Energy-5178.170486
Nuclear repulsion energy338.480545
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 MP2=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 A' 3292 3101 1.54 91.54 0.26 0.41
2 A' 658 620 15.41 4.33 0.55 0.71
3 A' 519 489 15.46 8.59 0.04 0.08
4 A' 195 184 0.03 3.14 0.48 0.65
5 A" 1234 1163 59.55 3.19 0.75 0.86
6 A" 779 734 123.50 1.22 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3338.3 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 3145.3 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 MP2=FULL/6-31G*
ABC
1.22668 0.04142 0.04011

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.854 0.000
H2 -0.548 1.784 0.000
Br3 0.007 -0.099 1.605
Br4 0.007 -0.099 -1.605

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08241.86701.8670
H21.08242.53562.5356
Br31.86702.53563.2108
Br41.86702.53563.2108

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 115.999 H2 C1 Br4 115.999
Br3 C1 Br4 118.600
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability