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

using model chemistry: HSEh1PBE/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 HSEh1PBE/6-31G
 hartrees
Energy at 0K-2611.066592
Energy at 298.15K 
HF Energy-2611.066592
Nuclear repulsion energy87.482039
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 HSEh1PBE/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 3134 2998 13.15 123.15 0.00 0.01
2 A1 1382 1322 13.67 0.87 0.63 0.77
3 A1 579 554 14.31 22.37 0.34 0.51
4 E 3266 3125 3.15 61.26 0.75 0.86
4 E 3266 3125 3.15 61.26 0.75 0.86
5 E 1518 1452 12.99 19.94 0.75 0.86
5 E 1518 1452 12.98 19.94 0.75 0.86
6 E 987 944 10.24 12.38 0.75 0.86
6 E 987 944 10.24 12.38 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8318.1 cm-1
Scaled (by 0.9566) Zero Point Vibrational Energy (zpe) 7957.0 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 HSEh1PBE/6-31G
ABC
5.18247 0.30609 0.30609

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.559
Br2 0.000 0.000 0.429
H3 0.000 1.037 -1.884
H4 0.898 -0.519 -1.884
H5 -0.898 -0.519 -1.884

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.98761.08681.08681.0868
Br21.98762.53422.53422.5342
H31.08682.53421.79651.7965
H41.08682.53421.79651.7965
H51.08682.53421.79651.7965

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 107.377 Br2 C1 H4 107.377
Br2 C1 H5 107.377 H3 C1 H4 111.482
H3 C1 H5 111.482 H4 C1 H5 111.482
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.696      
2 Br -0.002      
3 H 0.233      
4 H 0.233      
5 H 0.233      


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 -2.138 2.138
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.649 0.000 0.000
y 0.000 -25.649 0.000
z 0.000 0.000 -22.037
Traceless
 xyz
x -1.806 0.000 0.000
y 0.000 -1.806 0.000
z 0.000 0.000 3.612
Polar
3z2-r27.224
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 2.118 0.000 0.000
y 0.000 2.118 0.000
z 0.000 0.000 5.165


<r2> (average value of r2) Å2
<r2> 50.153
(<r2>)1/2 7.082