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

using model chemistry: B3LYP/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3LYP/SDD
 hartrees
Energy at 0K-53.282997
Energy at 298.15K 
HF Energy-53.282997
Nuclear repulsion energy24.976094
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 B3LYP/SDD
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 3102 2982 22.24      
2 A1 1357 1305 16.00      
3 A1 560 538 15.04      
4 E 3239 3113 11.62      
4 E 3239 3113 11.62      
5 E 1490 1433 11.17      
5 E 1490 1433 11.17      
6 E 969 932 13.61      
6 E 969 932 13.61      

Unscaled Zero Point Vibrational Energy (zpe) 8208.0 cm-1
Scaled (by 0.9613) Zero Point Vibrational Energy (zpe) 7890.4 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 B3LYP/SDD
ABC
5.13962 0.29775 0.29775

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/SDD

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.583
Br2 0.000 0.000 0.435
H3 0.000 1.042 -1.904
H4 0.902 -0.521 -1.904
H5 -0.902 -0.521 -1.904

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C12.01791.08971.08971.0897
Br22.01792.55992.55992.5599
H31.08972.55991.80401.8040
H41.08972.55991.80401.8040
H51.08972.55991.80401.8040

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 107.103 Br2 C1 H4 107.103
Br2 C1 H5 107.103 H3 C1 H4 111.732
H3 C1 H5 111.732 H4 C1 H5 111.732
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.756      
2 Br -0.043      
3 H 0.266      
4 H 0.266      
5 H 0.266      


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 -2.310 2.310
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.651 0.000 0.000
y 0.000 -22.651 0.000
z 0.000 0.000 -18.238
Traceless
 xyz
x -2.207 0.000 0.000
y 0.000 -2.207 0.000
z 0.000 0.000 4.413
Polar
3z2-r28.826
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 1.849 0.000 0.000
y 0.000 1.849 0.000
z 0.000 0.000 5.703


<r2> (average value of r2) Å2
<r2> 43.720
(<r2>)1/2 6.612