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

using model chemistry: HSEh1PBE/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-2613.761412
Energy at 298.15K 
HF Energy-2613.761412
Nuclear repulsion energy89.356026
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/cc-pVTZ
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 3094 2973 15.89 136.78 0.00 0.00
2 A1 1331 1279 16.62 0.02 0.54 0.70
3 A1 631 606 10.51 18.72 0.22 0.37
4 E 3203 3079 1.55 55.33 0.75 0.86
4 E 3203 3079 1.55 55.32 0.75 0.86
5 E 1471 1414 6.49 6.26 0.75 0.86
5 E 1471 1414 6.49 6.25 0.75 0.86
6 E 968 931 5.22 1.92 0.75 0.86
6 E 968 931 5.22 1.92 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8170.3 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 7852.5 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/cc-pVTZ
ABC
5.23508 0.32098 0.32098

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.517
Br2 0.000 0.000 0.419
H3 0.000 1.032 -1.852
H4 0.894 -0.516 -1.852
H5 -0.894 -0.516 -1.852

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.93561.08501.08501.0850
Br21.93562.49412.49412.4941
H31.08502.49411.78751.7875
H41.08502.49411.78751.7875
H51.08502.49411.78751.7875

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 107.980 Br2 C1 H4 107.980
Br2 C1 H5 107.980 H3 C1 H4 110.920
H3 C1 H5 110.920 H4 C1 H5 110.920
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.250      
2 Br -0.126      
3 H 0.125      
4 H 0.125      
5 H 0.125      


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 -1.910 1.910
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.804 0.000 0.000
y 0.000 -25.804 0.000
z 0.000 0.000 -22.166
Traceless
 xyz
x -1.819 0.000 0.000
y 0.000 -1.819 0.000
z 0.000 0.000 3.638
Polar
3z2-r27.276
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 3.729 0.000 0.000
y 0.000 3.729 -0.000
z 0.000 -0.000 6.070


<r2> (average value of r2) Å2
<r2> 48.785
(<r2>)1/2 6.985