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

using model chemistry: wB97X-D/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at wB97X-D/6-31G*
 hartrees
Energy at 0K-2611.625387
Energy at 298.15K 
HF Energy-2611.625387
Nuclear repulsion energy89.075296
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 wB97X-D/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 3121 2960 17.02 105.78 0.00 0.01
2 A1 1379 1308 20.93 1.03 0.68 0.81
3 A1 634 602 12.88 18.43 0.27 0.42
4 E 3236 3069 2.69 60.80 0.75 0.86
4 E 3236 3069 2.69 60.79 0.75 0.86
5 E 1515 1437 6.60 14.29 0.75 0.86
5 E 1515 1437 6.60 14.29 0.75 0.86
6 E 989 938 6.31 6.00 0.75 0.86
6 E 989 938 6.29 6.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8306.4 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 7878.6 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 wB97X-D/6-31G*
ABC
5.20574 0.31896 0.31896

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.521
Br2 0.000 0.000 0.420
H3 0.000 1.035 -1.858
H4 0.896 -0.517 -1.858
H5 -0.896 -0.517 -1.858

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94161.08841.08841.0884
Br21.94162.50252.50252.5025
H31.08842.50251.79251.7925
H41.08842.50251.79251.7925
H51.08842.50251.79251.7925

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 108.032 Br2 C1 H4 108.032
Br2 C1 H5 108.032 H3 C1 H4 110.871
H3 C1 H5 110.871 H4 C1 H5 110.871
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.514      
2 Br -0.139      
3 H 0.218      
4 H 0.218      
5 H 0.218      


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 -1.957 1.957
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.444 0.000 0.000
y 0.000 -25.444 0.000
z 0.000 0.000 -21.528
Traceless
 xyz
x -1.958 0.000 0.000
y 0.000 -1.958 0.000
z 0.000 0.000 3.916
Polar
3z2-r27.833
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 3.263 0.000 0.000
y 0.000 3.263 -0.000
z 0.000 -0.000 5.275


<r2> (average value of r2) Å2
<r2> 48.718
(<r2>)1/2 6.980