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

using model chemistry: mPW1PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at mPW1PW91/6-311G*
 hartrees
Energy at 0K-2614.216117
Energy at 298.15K 
HF Energy-2614.216117
Nuclear repulsion energy89.160919
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 mPW1PW91/6-311G*
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 3108 2966 21.57      
2 A1 1363 1301 21.26      
3 A1 623 594 12.09      
4 E 3219 3072 4.52      
4 E 3219 3072 4.52      
5 E 1496 1428 8.12      
5 E 1496 1428 8.12      
6 E 984 939 8.74      
6 E 984 939 8.74      

Unscaled Zero Point Vibrational Energy (zpe) 8245.8 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 7869.8 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 mPW1PW91/6-311G*
ABC
5.24366 0.31938 0.31938

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.520
Br2 0.000 0.000 0.420
H3 0.000 1.031 -1.859
H4 0.893 -0.516 -1.859
H5 -0.893 -0.516 -1.859

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94011.08531.08531.0853
Br21.94012.50112.50112.5011
H31.08532.50111.78601.7860
H41.08532.50111.78601.7860
H51.08532.50111.78601.7860

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 108.179 Br2 C1 H4 108.179
Br2 C1 H5 108.179 H3 C1 H4 110.732
H3 C1 H5 110.732 H4 C1 H5 110.732
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.747      
2 Br -0.062      
3 H 0.270      
4 H 0.270      
5 H 0.270      


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 -1.968 1.968
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.780 0.000 0.000
y 0.000 -25.780 0.000
z 0.000 0.000 -21.968
Traceless
 xyz
x -1.906 0.000 0.000
y 0.000 -1.906 0.000
z 0.000 0.000 3.813
Polar
3z2-r27.625
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 2.950 0.000 0.000
y 0.000 2.950 0.000
z 0.000 0.000 5.453


<r2> (average value of r2) Å2
<r2> 48.900
(<r2>)1/2 6.993