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All results from a given calculation for CH3Br (methyl bromide)

using model chemistry: TPSSh/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at TPSSh/6-311G*
 hartrees
Energy at 0K-2613.954971
Energy at 298.15K 
HF Energy-2613.954971
Nuclear repulsion energy88.608194
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 TPSSh/6-311G*
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 3085 2971 22.51 120.85 0.00 0.00
2 A1 1358 1308 29.16 0.56 0.66 0.79
3 A1 601 579 13.80 19.81 0.28 0.44
4 E 3193 3075 7.01 61.69 0.75 0.86
4 E 3193 3075 7.01 61.68 0.75 0.86
5 E 1505 1450 6.27 10.75 0.75 0.86
5 E 1505 1450 6.27 10.76 0.75 0.86
6 E 977 941 7.39 5.50 0.75 0.86
6 E 977 941 7.39 5.49 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8196.1 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 7894.5 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 TPSSh/6-311G*
ABC
5.20964 0.31505 0.31505

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.533
Br2 0.000 0.000 0.423
H3 0.000 1.035 -1.865
H4 0.896 -0.517 -1.865
H5 -0.896 -0.517 -1.865

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95581.08631.08631.0863
Br21.95582.51032.51032.5103
H31.08632.51031.79191.7919
H41.08632.51031.79191.7919
H51.08632.51031.79191.7919

picture of methyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 107.762 Br2 C1 H4 107.762
Br2 C1 H5 107.762 H3 C1 H4 111.125
H3 C1 H5 111.125 H4 C1 H5 111.125
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.692      
2 Br -0.077      
3 H 0.256      
4 H 0.256      
5 H 0.256      


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 -2.014 2.014
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.963 0.000 0.000
y 0.000 2.963 0.000
z 0.000 0.000 5.546


<r2> (average value of r2) Å2
<r2> 49.311
(<r2>)1/2 7.022