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

using model chemistry: PM6

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at PM6
 hartrees
Energy at 0K 
Energy at 298.15K-0.009016
HF Energy-0.009016
Nuclear repulsion energy29.973161
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 PM6
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 2766 2939 47.63      
2 A1 1255 1333 11.53      
3 A1 647 687 26.95      
4 E 2679 2847 114.27      
4 E 2679 2847 113.35      
5 E 1239 1317 65.18      
5 E 1239 1317 65.81      
6 E 889 945 29.10      
6 E 889 945 29.32      

Unscaled Zero Point Vibrational Energy (zpe) 7141.4 cm-1
Scaled (by 1.0624) Zero Point Vibrational Energy (zpe) 7587.0 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 PM6
ABC
5.22686 0.31682 0.31682

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM6

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.522
Br2 0.000 0.000 0.422
H3 0.000 1.033 -1.881
H4 0.894 -0.516 -1.881
H5 -0.894 -0.516 -1.881

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94351.09351.09351.0935
Br21.94352.52362.52362.5236
H31.09352.52361.78891.7889
H41.09352.52361.78891.7889
H51.09352.52361.78891.7889

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 109.171 Br2 C1 H4 109.171
Br2 C1 H5 109.171 H3 C1 H4 109.770
H3 C1 H5 109.770 H4 C1 H5 109.770
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PM6 Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.420      
2 Br -0.117      
3 H 0.179      
4 H 0.179      
5 H 0.179      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 -0.003 -1.584 1.584
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.570 0.000 0.000
y 0.000 1.655 -0.001
z 0.000 -0.001 4.407


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000