return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: wB97X-D/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at wB97X-D/STO-3G
 hartrees
Energy at 0K-2585.516440
Energy at 298.15K 
HF Energy-2585.516440
Nuclear repulsion energy89.449787
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 wB97X-D/STO-3G
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 3337 3337 0.20 41.53 0.01 0.01
2 A1 1541 1541 10.43 2.93 0.75 0.85
3 A1 772 772 5.48 11.08 0.34 0.51
4 E 3517 3517 0.09 28.27 0.75 0.86
4 E 3517 3517 0.09 28.27 0.75 0.86
5 E 1677 1677 5.96 16.66 0.75 0.86
5 E 1677 1677 5.97 16.66 0.75 0.86
6 E 1071 1071 1.10 4.78 0.75 0.86
6 E 1071 1071 1.09 4.78 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9089.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 9089.8 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 wB97X-D/STO-3G
ABC
5.22791 0.32242 0.32242

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.502
Br2 0.000 0.000 0.419
H3 0.000 1.033 -1.880
H4 0.894 -0.516 -1.880
H5 -0.894 -0.516 -1.880

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.92081.09981.09981.0998
Br21.92082.52032.52032.5203
H31.09982.52031.78871.7887
H41.09982.52031.78871.7887
H51.09982.52031.78871.7887

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 110.118 Br2 C1 H4 110.118
Br2 C1 H5 110.118 H3 C1 H4 108.817
H3 C1 H5 108.817 H4 C1 H5 108.817
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.279      
2 Br -0.013      
3 H 0.097      
4 H 0.097      
5 H 0.097      


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 -1.435 1.435
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.278 0.000 0.000
y 0.000 -23.278 0.000
z 0.000 0.000 -21.390
Traceless
 xyz
x -0.944 0.000 0.000
y 0.000 -0.944 0.000
z 0.000 0.000 1.888
Polar
3z2-r23.775
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 0.883 0.000 0.000
y 0.000 0.883 -0.000
z 0.000 -0.000 2.735


<r2> (average value of r2) Å2
<r2> 47.626
(<r2>)1/2 6.901