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: BLYP/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 BLYP/6-311G*
 hartrees
Energy at 0K-2614.039793
Energy at 298.15K 
HF Energy-2614.039793
Nuclear repulsion energy87.259411
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/6-311G*
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 3010 3003 20.10      
2 A1 1306 1303 25.07      
3 A1 551 550 12.27      
4 E 3113 3105 6.80      
4 E 3113 3105 6.80      
5 E 1454 1450 6.82      
5 E 1454 1450 6.82      
6 E 940 937 7.96      
6 E 940 937 7.96      

Unscaled Zero Point Vibrational Energy (zpe) 7940.0 cm-1
Scaled (by 0.9975) Zero Point Vibrational Energy (zpe) 7920.2 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/6-311G*
ABC
5.14657 0.30470 0.30470

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

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 1.041 -1.892
H4 0.901 -0.520 -1.892
H5 -0.901 -0.520 -1.892

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.99071.09231.09231.0923
Br21.99072.54462.54462.5446
H31.09232.54461.80281.8028
H41.09232.54461.80281.8028
H51.09232.54461.80281.8028

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 107.654 Br2 C1 H4 107.654
Br2 C1 H5 107.654 H3 C1 H4 111.226
H3 C1 H5 111.226 H4 C1 H5 111.226
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.672      
2 Br -0.067      
3 H 0.246      
4 H 0.246      
5 H 0.246      


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 -1.940 1.940
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.120 0.000 0.000
y 0.000 -26.120 0.000
z 0.000 0.000 -22.202
Traceless
 xyz
x -1.959 0.000 0.000
y 0.000 -1.959 0.000
z 0.000 0.000 3.918
Polar
3z2-r27.836
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 3.045 0.000 0.000
y 0.000 3.045 0.000
z 0.000 0.000 5.774


<r2> (average value of r2) Å2
<r2> 50.574
(<r2>)1/2 7.112