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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-2601.109172
Energy at 298.15K 
HF Energy-2601.109172
Nuclear repulsion energy87.482397
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 3125 3011 11.66 106.77 0.01 0.01
2 A1 1391 1340 12.22 0.78 0.63 0.77
3 A1 611 589 11.86 19.55 0.36 0.53
4 E 3238 3120 2.80 57.36 0.75 0.86
4 E 3238 3120 2.80 57.36 0.75 0.86
5 E 1532 1476 13.50 21.30 0.75 0.86
5 E 1532 1476 13.50 21.30 0.75 0.86
6 E 984 947 11.19 11.17 0.75 0.86
6 E 984 947 11.19 11.17 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8317.7 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 8012.5 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/3-21G
ABC
5.19114 0.30614 0.30614

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 -1.557
Br2 0.000 0.000 0.429
H3 0.000 1.036 -1.889
H4 0.898 -0.518 -1.889
H5 -0.898 -0.518 -1.889

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.98591.08821.08821.0882
Br21.98592.53882.53882.5388
H31.08822.53881.79501.7950
H41.08822.53881.79501.7950
H51.08822.53881.79501.7950

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 107.751 Br2 C1 H4 107.751
Br2 C1 H5 107.751 H3 C1 H4 111.136
H3 C1 H5 111.136 H4 C1 H5 111.136
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 -0.855      
2 Br 0.037      
3 H 0.273      
4 H 0.273      
5 H 0.273      


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 -1.870 1.870
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.496 0.000 0.000
y 0.000 -25.496 0.000
z 0.000 0.000 -22.068
Traceless
 xyz
x -1.714 0.000 0.000
y 0.000 -1.714 0.000
z 0.000 0.000 3.427
Polar
3z2-r26.855
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 1.991 0.000 0.000
y 0.000 1.991 0.000
z 0.000 0.000 4.972


<r2> (average value of r2) Å2
<r2> 50.118
(<r2>)1/2 7.079