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

using model chemistry: ROHF/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at ROHF/6-31G
 hartrees
Energy at 0K-2609.356079
Energy at 298.15K 
HF Energy-2609.356079
Nuclear repulsion energy87.433710
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 ROHF/6-31G
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 3279 2936 22.03      
2 A1 1483 1328 37.91      
3 A1 581 520 32.78      
4 E 3410 3053 2.63      
4 E 3410 3053 2.63      
5 E 1628 1457 10.50      
5 E 1628 1457 10.50      
6 E 1060 949 7.40      
6 E 1060 949 7.40      

Unscaled Zero Point Vibrational Energy (zpe) 8769.0 cm-1
Scaled (by 0.8953) Zero Point Vibrational Energy (zpe) 7850.9 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 ROHF/6-31G
ABC
5.28432 0.30470 0.30470

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.566
Br2 0.000 0.000 0.430
H3 0.000 1.027 -1.879
H4 0.890 -0.514 -1.879
H5 -0.890 -0.514 -1.879

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.99601.07351.07351.0735
Br21.99602.52632.52632.5263
H31.07352.52631.77911.7791
H41.07352.52631.77911.7791
H51.07352.52631.77911.7791

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 106.900 Br2 C1 H4 106.900
Br2 C1 H5 106.900 H3 C1 H4 111.916
H3 C1 H5 111.916 H4 C1 H5 111.916
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.638      
2 Br -0.040      
3 H 0.226      
4 H 0.226      
5 H 0.226      


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 -2.496 2.496
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.944 0.000 0.000
y 0.000 -25.945 -0.001
z 0.000 -0.001 -22.248
Traceless
 xyz
x -1.848 0.000 0.000
y 0.000 -1.849 -0.001
z 0.000 -0.001 3.696
Polar
3z2-r27.393
x2-y20.001
xy0.000
xz0.000
yz-0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 50.367
(<r2>)1/2 7.097