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

using model chemistry: B3LYP/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-53.069068
Energy at 298.15K 
HF Energy-53.069068
Nuclear repulsion energy24.904074
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/LANL2DZ
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 3103 2983 20.42      
2 A1 1356 1304 12.72      
3 A1 553 531 11.84      
4 E 3238 3113 13.62      
4 E 3238 3113 13.61      
5 E 1491 1433 11.02      
5 E 1491 1433 11.02      
6 E 966 929 13.68      
6 E 966 929 13.68      

Unscaled Zero Point Vibrational Energy (zpe) 8201.8 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 7883.6 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 B3LYP/LANL2DZ
ABC
5.14776 0.29482 0.29482

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/LANL2DZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.591
Br2 0.000 0.000 0.437
H3 0.000 1.041 -1.914
H4 0.901 -0.520 -1.914
H5 -0.901 -0.520 -1.914

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C12.02821.08961.08961.0896
Br22.02822.57082.57082.5708
H31.08962.57081.80261.8026
H41.08962.57081.80261.8026
H51.08962.57081.80261.8026

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 107.219 Br2 C1 H4 107.219
Br2 C1 H5 107.219 H3 C1 H4 111.626
H3 C1 H5 111.626 H4 C1 H5 111.627
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.735      
2 Br -0.060      
3 H 0.265      
4 H 0.265      
5 H 0.265      


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 -2.249 2.249
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.638 0.000 0.000
y 0.000 -22.638 0.000
z 0.000 0.000 -18.459
Traceless
 xyz
x -2.089 0.000 0.000
y 0.000 -2.089 0.000
z 0.000 0.000 4.179
Polar
3z2-r28.358
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 1.800 0.000 0.000
y 0.000 1.800 0.000
z 0.000 0.000 5.488


<r2> (average value of r2) Å2
<r2> 44.037
(<r2>)1/2 6.636