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

using model chemistry: B2PLYP/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 B2PLYP/6-311G*
 hartrees
Energy at 0K-2613.546507
Energy at 298.15K 
HF Energy-2613.459018
Nuclear repulsion energy88.677583
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 B2PLYP/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 3111 3111 21.45 114.46 0.00 0.00
2 A1 1377 1377 25.02 0.36 0.75 0.86
3 A1 612 612 12.49 21.24 0.28 0.44
4 E 3220 3220 4.93 60.99 0.75 0.86
4 E 3220 3220 4.93 60.99 0.75 0.86
5 E 1511 1511 7.15 11.02 0.75 0.86
5 E 1511 1511 7.15 11.02 0.75 0.86
6 E 989 989 7.85 5.16 0.75 0.86
6 E 989 989 7.85 5.16 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8269.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8269.0 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 B2PLYP/6-311G*
ABC
5.24197 0.31543 0.31543

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.531
Br2 0.000 0.000 0.423
H3 0.000 1.031 -1.867
H4 0.893 -0.516 -1.867
H5 -0.893 -0.516 -1.867

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.95361.08481.08481.0848
Br21.95362.51152.51152.5115
H31.08482.51151.78631.7863
H41.08482.51151.78631.7863
H51.08482.51151.78631.7863

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 108.064 Br2 C1 H4 108.064
Br2 C1 H5 108.064 H3 C1 H4 110.841
H3 C1 H5 110.841 H4 C1 H5 110.841
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.703      
2 Br -0.068      
3 H 0.257      
4 H 0.257      
5 H 0.257      


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 -1.975 1.975
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.040 0.000 0.000
y 0.000 -26.040 0.000
z 0.000 0.000 -22.248
Traceless
 xyz
x -1.896 0.000 0.000
y 0.000 -1.896 0.000
z 0.000 0.000 3.792
Polar
3z2-r27.584
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 2.940 0.000 0.000
y 0.000 2.940 0.000
z 0.000 0.000 5.513


<r2> (average value of r2) Å2
<r2> 49.434
(<r2>)1/2 7.031