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

using model chemistry: HF/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-2612.000661
Energy at 298.15K 
HF Energy-2612.000661
Nuclear repulsion energy88.961325
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/cc-pVDZ
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 3241 2943 27.66 133.47 0.00 0.01
2 A1 1434 1302 41.10 0.54 0.48 0.65
3 A1 636 577 26.01 30.55 0.30 0.46
4 E 3366 3056 3.08 70.25 0.75 0.86
4 E 3366 3056 3.08 70.25 0.75 0.86
5 E 1572 1428 5.97 10.42 0.75 0.86
5 E 1572 1428 5.97 10.42 0.75 0.86
6 E 1038 943 4.89 4.06 0.75 0.86
6 E 1038 943 4.89 4.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8631.4 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 7837.3 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/cc-pVDZ
ABC
5.22201 0.31778 0.31778

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.527
Br2 0.000 0.000 0.421
H3 0.000 1.033 -1.856
H4 0.895 -0.517 -1.856
H5 -0.895 -0.517 -1.856

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94731.08451.08451.0845
Br21.94732.50022.50022.5002
H31.08452.50021.78971.7897
H41.08452.50021.78971.7897
H51.08452.50021.78971.7897

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 107.679 Br2 C1 H4 107.679
Br2 C1 H5 107.679 H3 C1 H4 111.202
H3 C1 H5 111.202 H4 C1 H5 111.202
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.109      
2 Br -0.164      
3 H 0.091      
4 H 0.091      
5 H 0.091      


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 -2.144 2.144
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.787 0.000 0.000
y 0.000 -25.787 0.000
z 0.000 0.000 -21.926
Traceless
 xyz
x -1.931 0.000 0.000
y 0.000 -1.931 0.000
z 0.000 0.000 3.861
Polar
3z2-r27.722
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 2.855 0.000 0.000
y 0.000 2.855 0.000
z 0.000 0.000 5.495


<r2> (average value of r2) Å2
<r2> 49.017
(<r2>)1/2 7.001