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

using model chemistry: PBE1PBE/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at PBE1PBE/TZVP
 hartrees
Energy at 0K-2613.727632
Energy at 298.15K 
HF Energy-2613.727632
Nuclear repulsion energy89.157028
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 PBE1PBE/TZVP
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 3101 2975 15.74 135.30 0.00 0.00
2 A1 1343 1288 20.09 0.84 0.51 0.67
3 A1 627 601 11.83 19.59 0.32 0.48
4 E 3214 3084 1.74 60.51 0.75 0.86
4 E 3214 3084 1.74 60.51 0.75 0.86
5 E 1472 1413 7.44 11.16 0.75 0.86
5 E 1472 1413 7.44 11.16 0.75 0.86
6 E 970 931 6.42 5.23 0.75 0.86
6 E 970 931 6.42 5.23 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8190.6 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 7859.7 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 PBE1PBE/TZVP
ABC
5.22660 0.31944 0.31944

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/TZVP

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 1.033 -1.856
H4 0.894 -0.516 -1.856
H5 -0.894 -0.516 -1.856

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94041.08611.08611.0861
Br21.94042.49962.49962.4996
H31.08612.49961.78891.7889
H41.08612.49961.78891.7889
H51.08612.49961.78891.7889

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 108.015 Br2 C1 H4 108.015
Br2 C1 H5 108.015 H3 C1 H4 110.888
H3 C1 H5 110.888 H4 C1 H5 110.887
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.302      
2 Br -0.155      
3 H 0.153      
4 H 0.153      
5 H 0.153      


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 -2.006 2.006
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.826 0.000 0.000
y 0.000 -25.826 0.000
z 0.000 0.000 -22.012
Traceless
 xyz
x -1.907 0.000 0.000
y 0.000 -1.907 0.000
z 0.000 0.000 3.813
Polar
3z2-r27.627
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 3.298 0.000 0.000
y 0.000 3.298 0.000
z 0.000 0.000 5.682


<r2> (average value of r2) Å2
<r2> 48.917
(<r2>)1/2 6.994