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

using model chemistry: HSEh1PBE/3-21G*

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/3-21G*
 hartrees
Energy at 0K-2601.345385
Energy at 298.15K 
HF Energy-2601.345385
Nuclear repulsion energy88.928504
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/3-21G*
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 3107 2983 13.51 100.03 0.00 0.00
2 A1 1393 1337 9.63 2.29 0.57 0.73
3 A1 644 618 9.41 15.89 0.28 0.44
4 E 3214 3085 2.50 56.62 0.75 0.86
4 E 3214 3085 2.50 56.62 0.75 0.86
5 E 1539 1478 10.63 18.35 0.75 0.86
5 E 1539 1478 10.63 18.35 0.75 0.86
6 E 991 952 10.27 7.12 0.75 0.86
6 E 991 952 10.28 7.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8316.3 cm-1
Scaled (by 0.9599) Zero Point Vibrational Energy (zpe) 7982.9 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 HSEh1PBE/3-21G*
ABC
5.20086 0.31785 0.31785

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.524
Br2 0.000 0.000 0.421
H3 0.000 1.035 -1.864
H4 0.897 -0.518 -1.864
H5 -0.897 -0.518 -1.864

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94451.08981.08981.0898
Br21.94452.50832.50832.5083
H31.08982.50831.79341.7934
H41.08982.50831.79341.7934
H51.08982.50831.79341.7934

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 108.185 Br2 C1 H4 108.185
Br2 C1 H5 108.185 H3 C1 H4 110.726
H3 C1 H5 110.726 H4 C1 H5 110.726
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.697      
2 Br -0.077      
3 H 0.258      
4 H 0.258      
5 H 0.258      


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 -1.783 1.783
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.364 0.000 0.000
y 0.000 -25.364 0.000
z 0.000 0.000 -21.465
Traceless
 xyz
x -1.949 0.000 0.000
y 0.000 -1.949 0.000
z 0.000 0.000 3.899
Polar
3z2-r27.798
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 2.870 0.000 0.000
y 0.000 2.870 0.000
z 0.000 0.000 4.953


<r2> (average value of r2) Å2
<r2> 48.794
(<r2>)1/2 6.985