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

using model chemistry: PBEPBE/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 PBEPBE/6-311G*
 hartrees
Energy at 0K-2613.590921
Energy at 298.15K 
HF Energy-2613.590921
Nuclear repulsion energy88.301493
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 PBEPBE/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 3018 2986 19.48      
2 A1 1306 1293 18.83      
3 A1 587 581 10.23      
4 E 3126 3093 4.85      
4 E 3126 3093 4.86      
5 E 1443 1428 8.00      
5 E 1443 1428 8.00      
6 E 945 935 9.05      
6 E 945 935 9.05      

Unscaled Zero Point Vibrational Energy (zpe) 7969.0 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 7886.1 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 PBEPBE/6-311G*
ABC
5.15161 0.31314 0.31314

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.536
Br2 0.000 0.000 0.424
H3 0.000 1.040 -1.875
H4 0.901 -0.520 -1.875
H5 -0.901 -0.520 -1.875

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.96001.09421.09421.0942
Br21.96002.52362.52362.5236
H31.09422.52361.80191.8019
H41.09422.52361.80191.8019
H51.09422.52361.80191.8019

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 108.058 Br2 C1 H4 108.058
Br2 C1 H5 108.058 H3 C1 H4 110.846
H3 C1 H5 110.846 H4 C1 H5 110.846
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.738      
2 Br -0.054      
3 H 0.264      
4 H 0.264      
5 H 0.264      


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 -1.904 1.904
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.954 0.000 0.000
y 0.000 -25.954 0.000
z 0.000 0.000 -22.120
Traceless
 xyz
x -1.917 0.000 0.000
y 0.000 -1.917 0.000
z 0.000 0.000 3.835
Polar
3z2-r27.669
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 3.036 0.000 0.000
y 0.000 3.036 0.000
z 0.000 0.000 5.605


<r2> (average value of r2) Å2
<r2> 49.656
(<r2>)1/2 7.047