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: HF/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 HF/6-311G*
 hartrees
Energy at 0K-2611.989906
Energy at 298.15K 
HF Energy-2611.989906
Nuclear repulsion energy89.146299
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 HF/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 2938 34.53 117.68 0.00 0.01
2 A1 1477 1336 47.26 0.44 0.10 0.18
3 A1 641 580 26.42 32.67 0.30 0.46
4 E 3358 3037 8.34 66.32 0.75 0.86
4 E 3358 3037 8.34 66.32 0.75 0.86
5 E 1612 1458 5.56 10.85 0.75 0.86
5 E 1612 1458 5.56 10.85 0.75 0.86
6 E 1061 960 6.01 4.81 0.75 0.86
6 E 1061 960 6.01 4.81 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8714.7 cm-1
Scaled (by 0.9044) Zero Point Vibrational Energy (zpe) 7881.6 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 HF/6-311G*
ABC
5.31487 0.31856 0.31856

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/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 0.420
H3 0.000 1.024 -1.855
H4 0.887 -0.512 -1.855
H5 -0.887 -0.512 -1.855

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94511.07611.07611.0761
Br21.94512.49522.49522.4952
H31.07612.49521.77401.7740
H41.07612.49521.77401.7740
H51.07612.49521.77401.7740

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 107.868 Br2 C1 H4 107.868
Br2 C1 H5 107.868 H3 C1 H4 111.026
H3 C1 H5 111.026 H4 C1 H5 111.026
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/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 -2.221 2.221
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.073 0.000 0.000
y 0.000 -26.073 0.000
z 0.000 0.000 -22.079
Traceless
 xyz
x -1.997 0.000 0.000
y 0.000 -1.997 0.000
z 0.000 0.000 3.994
Polar
3z2-r27.989
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 2.859 0.000 0.000
y 0.000 2.859 0.000
z 0.000 0.000 5.500


<r2> (average value of r2) Å2
<r2> 49.056
(<r2>)1/2 7.004