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

using model chemistry: B3LYPultrafine/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 B3LYPultrafine/6-311G*
 hartrees
Energy at 0K-2614.069118
Energy at 298.15K 
HF Energy-2614.069118
Nuclear repulsion energy88.308217
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 B3LYPultrafine/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 3084 2981 21.16 117.39 0.00 0.00
2 A1 1354 1308 25.00 0.36 0.75 0.85
3 A1 593 573 13.15 21.04 0.28 0.44
4 E 3189 3082 5.52 61.96 0.75 0.86
4 E 3189 3082 5.52 61.96 0.75 0.86
5 E 1493 1442 7.41 10.89 0.75 0.86
5 E 1493 1442 7.41 10.89 0.75 0.86
6 E 974 941 8.11 5.21 0.75 0.86
6 E 974 941 8.11 5.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8171.2 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 7895.8 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 B3LYPultrafine/6-311G*
ABC
5.22407 0.31255 0.31255

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.539
Br2 0.000 0.000 0.424
H3 0.000 1.033 -1.874
H4 0.895 -0.517 -1.874
H5 -0.895 -0.517 -1.874

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.96351.08591.08591.0859
Br21.96352.51962.51962.5196
H31.08592.51961.78941.7894
H41.08592.51961.78941.7894
H51.08592.51961.78941.7894

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 107.946 Br2 C1 H4 107.946
Br2 C1 H5 107.946 H3 C1 H4 110.953
H3 C1 H5 110.953 H4 C1 H5 110.953
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.699      
2 Br -0.068      
3 H 0.256      
4 H 0.256      
5 H 0.256      


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 -1.976 1.976
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.993 0.000 0.000
y 0.000 -25.993 0.000
z 0.000 0.000 -22.129
Traceless
 xyz
x -1.932 0.000 0.000
y 0.000 -1.932 0.000
z 0.000 0.000 3.863
Polar
3z2-r27.727
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 2.978 0.000 0.000
y 0.000 2.978 0.000
z 0.000 0.000 5.606


<r2> (average value of r2) Å2
<r2> 49.681
(<r2>)1/2 7.048