return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: M06-2X/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 M06-2X/6-31G*
 hartrees
Energy at 0K-2611.657068
Energy at 298.15K-2611.662878
HF Energy-2611.657068
Nuclear repulsion energy89.114317
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 M06-2X/6-31G*
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 3133 2967 12.01      
2 A1 1370 1297 21.91      
3 A1 637 604 13.99      
4 E 3246 3074 1.27      
4 E 3246 3074 1.31      
5 E 1510 1430 5.69      
5 E 1510 1430 5.59      
6 E 991 938 5.97      
6 E 990 938 6.00      

Unscaled Zero Point Vibrational Energy (zpe) 8316.9 cm-1
Scaled (by 0.947) Zero Point Vibrational Energy (zpe) 7876.1 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 M06-2X/6-31G*
ABC
5.20505 0.31921 0.31921

See section I.F.4 to change rotational constant units
Geometric Data calculated at M06-2X/6-31G*

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 0.420
H3 0.000 1.035 -1.854
H4 0.896 -0.517 -1.854
H5 -0.896 -0.517 -1.854

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94181.08701.08701.0870
Br21.94182.49852.49852.4985
H31.08702.49851.79261.7926
H41.08702.49851.79261.7926
H51.08702.49851.79261.7926

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 107.798 Br2 C1 H4 107.798
Br2 C1 H5 107.798 H3 C1 H4 111.091
H3 C1 H5 111.091 H4 C1 H5 111.091
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at M06-2X/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.505      
2 Br -0.141      
3 H 0.215      
4 H 0.215      
5 H 0.215      


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 -1.988 1.988
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.615 0.000 0.000
y 0.000 -25.615 0.000
z 0.000 0.000 -21.757
Traceless
 xyz
x -1.929 0.000 0.000
y 0.000 -1.929 0.000
z 0.000 0.000 3.858
Polar
3z2-r27.716
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 3.232 0.000 0.000
y 0.000 3.227 0.005
z 0.000 0.005 5.233


<r2> (average value of r2) Å2
<r2> 48.792
(<r2>)1/2 6.985