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

using model chemistry: wB97X-D/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at wB97X-D/3-21G*
 hartrees
Energy at 0K-2601.748503
Energy at 298.15K 
HF Energy-2601.748503
Nuclear repulsion energy88.843974
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 wB97X-D/3-21G*
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 3119 2956 12.22 98.27 0.00 0.01
2 A1 1407 1334 8.20 1.54 0.62 0.77
3 A1 649 615 9.50 17.60 0.29 0.44
4 E 3224 3056 2.06 57.92 0.75 0.86
4 E 3224 3056 2.04 57.91 0.75 0.86
5 E 1546 1466 11.46 18.70 0.75 0.86
5 E 1546 1466 11.45 18.70 0.75 0.86
6 E 998 945 10.06 7.03 0.75 0.86
6 E 998 945 10.06 7.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8355.0 cm-1
Scaled (by 0.9478) Zero Point Vibrational Energy (zpe) 7918.9 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 wB97X-D/3-21G*
ABC
5.20907 0.31708 0.31708

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.526
Br2 0.000 0.000 0.421
H3 0.000 1.035 -1.865
H4 0.896 -0.517 -1.865
H5 -0.896 -0.517 -1.865

Atom - Atom Distances (Å)
  C1 Br2 H3 H4 H5
C11.94721.08881.08881.0888
Br21.94722.50972.50972.5097
H31.08882.50971.79191.7919
H41.08882.50971.79191.7919
H51.08882.50971.79191.7919

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 108.160 Br2 C1 H4 108.160
Br2 C1 H5 108.160 H3 C1 H4 110.750
H3 C1 H5 110.750 H4 C1 H5 110.750
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.682      
2 Br -0.085      
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 -1.817 1.817
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.332 0.000 0.000
y 0.000 -25.332 0.000
z 0.000 0.000 -21.404
Traceless
 xyz
x -1.964 0.000 0.000
y 0.000 -1.964 0.000
z 0.000 0.000 3.928
Polar
3z2-r27.856
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 2.874 0.000 0.000
y 0.000 2.874 0.000
z 0.000 0.000 4.979


<r2> (average value of r2) Å2
<r2> 48.835
(<r2>)1/2 6.988