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

using model chemistry: BLYP/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at BLYP/6-31+G**
 hartrees
Energy at 0K-2611.612635
Energy at 298.15K 
HF Energy-2611.612635
Nuclear repulsion energy87.256878
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 BLYP/6-31+G**
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 3018 3002 17.08      
2 A1 1300 1293 29.02      
3 A1 556 553 12.31      
4 E 3127 3111 2.79      
4 E 3127 3111 2.79      
5 E 1443 1435 5.93      
5 E 1443 1435 5.93      
6 E 941 936 5.80      
6 E 941 936 5.80      

Unscaled Zero Point Vibrational Energy (zpe) 7948.1 cm-1
Scaled (by 0.9947) Zero Point Vibrational Energy (zpe) 7905.9 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 BLYP/6-31+G**
ABC
5.11365 0.30491 0.30491

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-31+G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.561
Br2 0.000 0.000 0.430
H3 0.000 1.044 -1.890
H4 0.904 -0.522 -1.890
H5 -0.904 -0.522 -1.890

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.99021.09491.09491.0949
Br21.99022.54372.54372.5437
H31.09492.54371.80861.8086
H41.09492.54371.80861.8086
H51.09492.54371.80861.8086

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 107.503 Br2 C1 H4 107.503
Br2 C1 H5 107.503 H3 C1 H4 111.366
H3 C1 H5 111.366 H4 C1 H5 111.366
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.396      
2 Br -0.152      
3 H 0.183      
4 H 0.183      
5 H 0.183      


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 -2.061 2.061
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.386 0.000 0.000
y 0.000 -26.386 0.000
z 0.000 0.000 -22.271
Traceless
 xyz
x -2.057 0.000 0.000
y 0.000 -2.057 0.000
z 0.000 0.000 4.115
Polar
3z2-r28.229
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 4.025 0.000 0.000
y 0.000 4.025 -0.000
z 0.000 -0.000 6.200


<r2> (average value of r2) Å2
<r2> 50.683
(<r2>)1/2 7.119