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

using model chemistry: ROHF/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 ROHF/6-311G*
 hartrees
Energy at 0K-2611.989907
Energy at 298.15K 
HF Energy-2611.989907
Nuclear repulsion energy89.123756
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 ROHF/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 3249 2780 34.49      
2 A1 1477 1264 47.48      
3 A1 640 548 26.45      
4 E 3358 2873 8.35      
4 E 3358 2873 8.35      
5 E 1612 1380 5.56      
5 E 1612 1380 5.56      
6 E 1061 908 6.02      
6 E 1061 908 6.02      

Unscaled Zero Point Vibrational Energy (zpe) 8713.7 cm-1
Scaled (by 0.8556) Zero Point Vibrational Energy (zpe) 7455.5 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 ROHF/6-311G*
ABC
5.31545 0.31838 0.31838

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.525
Br2 0.000 0.000 0.421
H3 0.000 1.024 -1.856
H4 0.887 -0.512 -1.856
H5 -0.887 -0.512 -1.856

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94571.07621.07621.0762
Br21.94572.49592.49592.4959
H31.07622.49591.77391.7739
H41.07622.49591.77391.7739
H51.07622.49591.77391.7739

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 107.880 Br2 C1 H4 107.880
Br2 C1 H5 107.880 H3 C1 H4 111.014
H3 C1 H5 111.014 H4 C1 H5 111.014
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.675      
2 Br -0.103      
3 H 0.259      
4 H 0.259      
5 H 0.259      


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 -2.222 2.222
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.075 0.000 0.000
y 0.000 -26.075 -0.001
z 0.000 -0.001 -22.072
Traceless
 xyz
x -2.001 0.000 0.000
y 0.000 -2.002 -0.001
z 0.000 -0.001 4.003
Polar
3z2-r28.006
x2-y20.001
xy0.000
xz0.000
yz-0.001


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


<r2> (average value of r2) Å2
<r2> 49.074
(<r2>)1/2 7.005