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All results from a given calculation for CH3MgBr (Methyl Magnesium Bromide)

using model chemistry: PBE1PBE/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 PBE1PBE/3-21G*
 hartrees
Energy at 0K-2800.286467
Energy at 298.15K 
HF Energy-2800.286467
Nuclear repulsion energy168.166205
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 PBE1PBE/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 3039 2917 10.87 91.69 0.00 0.00
2 A1 1241 1191 0.49 45.88 0.05 0.09
3 A1 636 610 61.14 9.82 0.05 0.09
4 A1 321 308 10.77 17.33 0.17 0.29
5 E 3127 3002 9.14 110.49 0.75 0.86
5 E 3127 3002 9.14 110.49 0.75 0.86
6 E 1530 1469 0.04 5.60 0.75 0.86
6 E 1530 1469 0.04 5.60 0.75 0.86
7 E 659 633 102.63 2.64 0.75 0.86
7 E 659 633 102.63 2.64 0.75 0.86
8 E 125 120 21.67 0.25 0.75 0.86
8 E 125 120 21.67 0.25 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8059.4 cm-1
Scaled (by 0.9598) Zero Point Vibrational Energy (zpe) 7735.4 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 PBE1PBE/3-21G*
ABC
5.28884 0.05593 0.05593

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.161
Mg2 0.000 0.000 -1.088
Br3 0.000 0.000 1.219
H4 0.000 1.027 -3.552
H5 0.889 -0.513 -3.552
H6 -0.889 -0.513 -3.552

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.07284.38001.09881.09881.0988
Mg22.07282.30722.66942.66942.6694
Br34.38002.30724.88054.88054.8805
H41.09882.66944.88051.77841.7784
H51.09882.66944.88051.77841.7784
H61.09882.66944.88051.77841.7784

picture of Methyl Magnesium Bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 Mg2 Br3 180.000 Mg2 C1 H4 110.858
Mg2 C1 H5 110.858 Mg2 C1 H6 110.858
H4 C1 H5 108.049 H4 C1 H6 108.049
H5 C1 H6 108.049
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.029      
2 Mg 0.692      
3 Br -0.329      
4 H 0.222      
5 H 0.222      
6 H 0.222      


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 -1.843 1.843
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.072 0.000 0.000
y 0.000 -34.072 0.000
z 0.000 0.000 -41.234
Traceless
 xyz
x 3.581 0.000 0.000
y 0.000 3.581 0.000
z 0.000 0.000 -7.162
Polar
3z2-r2-14.324
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 5.870 0.000 0.000
y 0.000 5.870 0.000
z 0.000 0.000 9.844


<r2> (average value of r2) Å2
<r2> 189.961
(<r2>)1/2 13.783