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

using model chemistry: HF/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at HF/Def2TZVPP
 hartrees
Energy at 0K-2612.046728
Energy at 298.15K 
HF Energy-2612.046728
Nuclear repulsion energy89.307553
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 HF/Def2TZVPP
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 3227 2925 26.89 136.96 0.00 0.00
2 A1 1456 1319 35.28 1.94 0.34 0.50
3 A1 643 583 23.33 30.20 0.27 0.43
4 E 3334 3022 4.15 58.70 0.75 0.86
4 E 3334 3022 4.15 58.70 0.75 0.86
5 E 1596 1446 5.53 5.93 0.75 0.86
5 E 1596 1446 5.53 5.93 0.75 0.86
6 E 1050 952 3.58 1.74 0.75 0.86
6 E 1050 952 3.58 1.74 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8642.7 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 7833.8 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 HF/Def2TZVPP
ABC
5.31642 0.31983 0.31983

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.522
Br2 0.000 0.000 0.419
H3 0.000 1.024 -1.850
H4 0.887 -0.512 -1.850
H5 -0.887 -0.512 -1.850

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94161.07521.07521.0752
Br21.94162.48952.48952.4895
H31.07522.48951.77381.7738
H41.07522.48951.77381.7738
H51.07522.48951.77381.7738

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 107.734 Br2 C1 H4 107.734
Br2 C1 H5 107.734 H3 C1 H4 111.151
H3 C1 H5 111.151 H4 C1 H5 111.151
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.184      
2 Br -0.158      
3 H 0.114      
4 H 0.114      
5 H 0.114      


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 -2.181 2.181
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.962 0.000 0.000
y 0.000 -25.962 0.000
z 0.000 0.000 -22.126
Traceless
 xyz
x -1.918 0.000 0.000
y 0.000 -1.918 0.000
z 0.000 0.000 3.836
Polar
3z2-r27.671
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 3.882 0.000 0.000
y 0.000 3.882 0.000
z 0.000 0.000 6.150


<r2> (average value of r2) Å2
<r2> 48.887
(<r2>)1/2 6.992