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

using model chemistry: M06-2X/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at M06-2X/6-31G(2df,p)
 hartrees
Energy at 0K-2611.830266
Energy at 298.15K 
HF Energy-2611.830266
Nuclear repulsion energy89.970270
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 M06-2X/6-31G(2df,p)
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 3111 2963 12.79 104.22 0.00 0.00
2 A1 1344 1280 15.61 0.59 0.72 0.83
3 A1 660 628 11.26 16.40 0.20 0.33
4 E 3220 3067 1.37 57.47 0.75 0.86
4 E 3220 3066 1.36 57.42 0.75 0.86
5 E 1484 1413 4.94 10.73 0.75 0.86
5 E 1484 1413 4.95 10.68 0.75 0.86
6 E 982 936 4.13 2.86 0.75 0.86
6 E 982 936 4.12 2.90 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8243.1 cm-1
Scaled (by 0.9524) Zero Point Vibrational Energy (zpe) 7850.7 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 M06-2X/6-31G(2df,p)
ABC
5.24565 0.32607 0.32607

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.502
Br2 0.000 0.000 0.416
H3 0.000 1.031 -1.846
H4 0.893 -0.515 -1.846
H5 -0.893 -0.515 -1.846

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.91731.08681.08681.0868
Br21.91732.48522.48522.4852
H31.08682.48521.78571.7857
H41.08682.48521.78571.7857
H51.08682.48521.78571.7857

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 108.447 Br2 C1 H4 108.447
Br2 C1 H5 108.447 H3 C1 H4 110.476
H3 C1 H5 110.476 H4 C1 H5 110.476
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.502      
2 Br -0.046      
3 H 0.183      
4 H 0.183      
5 H 0.183      


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 -1.860 1.860
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.497 0.000 0.000
y 0.000 -25.497 0.000
z 0.000 0.000 -21.975
Traceless
 xyz
x -1.761 0.000 0.000
y 0.000 -1.761 0.000
z 0.000 0.000 3.522
Polar
3z2-r27.043
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 3.995 0.000 0.000
y 0.000 3.997 -0.003
z 0.000 -0.003 5.777


<r2> (average value of r2) Å2
<r2> 48.176
(<r2>)1/2 6.941