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

using model chemistry: PBEPBE/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 PBEPBE/3-21G*
 hartrees
Energy at 0K-2800.162587
Energy at 298.15K 
HF Energy-2800.162587
Nuclear repulsion energy167.363235
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 PBEPBE/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 2961 2824 9.36 98.22 0.00 0.00
2 A1 1192 1137 0.35 52.66 0.03 0.06
3 A1 618 590 54.55 9.60 0.03 0.05
4 A1 313 299 9.71 21.66 0.16 0.28
5 E 3049 2907 8.32 109.40 0.75 0.86
5 E 3049 2907 8.32 109.40 0.75 0.86
6 E 1488 1419 0.01 4.97 0.75 0.86
6 E 1488 1419 0.01 4.97 0.75 0.86
7 E 649 619 96.37 2.60 0.75 0.86
7 E 649 619 96.37 2.61 0.75 0.86
8 E 120 115 16.54 0.32 0.75 0.86
8 E 120 115 16.54 0.32 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7847.7 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 7482.8 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 PBEPBE/3-21G*
ABC
5.20573 0.05540 0.05540

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.177
Mg2 0.000 0.000 -1.092
Br3 0.000 0.000 1.225
H4 0.000 1.035 -3.568
H5 0.896 -0.517 -3.568
H6 -0.896 -0.517 -3.568

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.08464.40191.10621.10621.1062
Mg22.08462.31732.68302.68302.6830
Br34.40192.31734.90314.90314.9031
H41.10622.68304.90311.79251.7925
H51.10622.68304.90311.79251.7925
H61.10622.68304.90311.79251.7925

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 110.686
Mg2 C1 H5 110.686 Mg2 C1 H6 110.686
H4 C1 H5 108.230 H4 C1 H6 108.230
H5 C1 H6 108.230
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.982      
2 Mg 0.637      
3 Br -0.304      
4 H 0.216      
5 H 0.216      
6 H 0.216      


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 -1.840 1.840
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.401 0.000 0.000
y 0.000 -34.401 0.000
z 0.000 0.000 -40.130
Traceless
 xyz
x 2.864 0.000 0.000
y 0.000 2.864 0.000
z 0.000 0.000 -5.728
Polar
3z2-r2-11.457
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 6.252 0.000 0.000
y 0.000 6.252 0.000
z 0.000 0.000 10.726


<r2> (average value of r2) Å2
<r2> 191.470
(<r2>)1/2 13.837