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

using model chemistry: HF/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 HF/6-31G
 hartrees
Energy at 0K-2609.356079
Energy at 298.15K 
HF Energy-2609.356079
Nuclear repulsion energy87.457096
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/6-31G
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 3279 2961 22.07 133.80 0.01 0.01
2 A1 1484 1340 37.78 0.77 0.23 0.37
3 A1 582 525 32.64 43.15 0.35 0.52
4 E 3409 3078 2.66 70.68 0.75 0.86
4 E 3409 3078 2.66 70.68 0.75 0.86
5 E 1628 1470 10.51 20.15 0.75 0.86
5 E 1628 1470 10.51 20.15 0.75 0.86
6 E 1060 957 7.41 11.85 0.75 0.86
6 E 1060 957 7.41 11.85 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8769.4 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 7917.9 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/6-31G
ABC
5.28511 0.30488 0.30488

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.566
Br2 0.000 0.000 0.429
H3 0.000 1.027 -1.878
H4 0.890 -0.514 -1.878
H5 -0.890 -0.514 -1.878

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.99521.07361.07361.0736
Br21.99522.52602.52602.5260
H31.07362.52601.77901.7790
H41.07362.52601.77901.7790
H51.07362.52601.77901.7790

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 106.924 Br2 C1 H4 106.924
Br2 C1 H5 106.924 H3 C1 H4 111.893
H3 C1 H5 111.893 H4 C1 H5 111.893
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.638      
2 Br -0.039      
3 H 0.226      
4 H 0.226      
5 H 0.226      


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 -2.493 2.493
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.944 0.000 0.000
y 0.000 -25.944 0.000
z 0.000 0.000 -22.253
Traceless
 xyz
x -1.845 0.000 0.000
y 0.000 -1.845 0.000
z 0.000 0.000 3.691
Polar
3z2-r27.381
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 2.044 0.000 0.000
y 0.000 2.044 0.000
z 0.000 0.000 5.532


<r2> (average value of r2) Å2
<r2> 50.350
(<r2>)1/2 7.096