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

using model chemistry: B2PLYP/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 B2PLYP/6-31G
 hartrees
Energy at 0K-2610.894054
Energy at 298.15K 
HF Energy-2610.850203
Nuclear repulsion energy86.754852
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 B2PLYP/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3137 3137 15.01 117.93 0.01 0.01
2 A1 1389 1389 22.13 0.41 0.72 0.84
3 A1 559 559 15.09 24.71 0.34 0.51
4 E 3263 3263 4.66 61.48 0.75 0.86
4 E 3263 3263 4.66 61.48 0.75 0.86
5 E 1535 1535 9.77 20.24 0.75 0.86
5 E 1535 1535 9.77 20.24 0.75 0.86
6 E 984 984 8.14 12.72 0.75 0.86
6 E 984 984 8.14 12.72 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8323.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8323.9 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 B2PLYP/6-31G
ABC
5.17607 0.30028 0.30028

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.576
Br2 0.000 0.000 0.433
H3 0.000 1.038 -1.896
H4 0.899 -0.519 -1.896
H5 -0.899 -0.519 -1.896

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C12.00911.08611.08611.0861
Br22.00912.55002.55002.5500
H31.08612.55001.79771.7977
H41.08612.55001.79771.7977
H51.08612.55001.79771.7977

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 107.140 Br2 C1 H4 107.140
Br2 C1 H5 107.140 H3 C1 H4 111.698
H3 C1 H5 111.698 H4 C1 H5 111.698
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.595      
2 Br -0.018      
3 H 0.204      
4 H 0.204      
5 H 0.204      


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 -2.121 2.121
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.845 0.000 0.000
y 0.000 -25.845 0.000
z 0.000 0.000 -22.249
Traceless
 xyz
x -1.798 0.000 0.000
y 0.000 -1.798 0.000
z 0.000 0.000 3.596
Polar
3z2-r27.192
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 2.103 0.000 0.000
y 0.000 2.103 0.000
z 0.000 0.000 5.290


<r2> (average value of r2) Å2
<r2> 50.872
(<r2>)1/2 7.132