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

using model chemistry: PBE1PBE/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 PBE1PBE/6-31G*
 hartrees
Energy at 0K-2811.269266
Energy at 298.15K 
HF Energy-2811.269266
Nuclear repulsion energy166.786113
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/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 3059 2907 14.57 105.91 0.00 0.00
2 A1 1205 1145 1.04 54.96 0.07 0.13
3 A1 616 586 68.72 11.02 0.08 0.15
4 A1 308 293 13.53 18.87 0.18 0.30
5 E 3147 2991 10.65 121.83 0.75 0.86
5 E 3147 2991 10.65 121.83 0.75 0.86
6 E 1491 1417 0.01 4.32 0.75 0.86
6 E 1491 1417 0.01 4.32 0.75 0.86
7 E 618 587 89.12 2.45 0.75 0.86
7 E 618 587 89.12 2.45 0.75 0.86
8 E 127 120 24.00 0.47 0.75 0.86
8 E 127 120 24.00 0.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7976.9 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 7580.4 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/6-31G*
ABC
5.36031 0.05505 0.05505

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.178
Mg2 0.000 0.000 -1.104
Br3 0.000 0.000 1.230
H4 0.000 1.020 -3.581
H5 0.883 -0.510 -3.581
H6 -0.883 -0.510 -3.581

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.07364.40801.09671.09671.0967
Mg22.07362.33442.67862.67862.6786
Br34.40802.33444.91814.91814.9181
H41.09672.67864.91811.76651.7665
H51.09672.67864.91811.76651.7665
H61.09672.67864.91811.76651.7665

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 111.570
Mg2 C1 H5 111.570 Mg2 C1 H6 111.570
H4 C1 H5 107.293 H4 C1 H6 107.293
H5 C1 H6 107.293
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.843      
2 Mg 0.567      
3 Br -0.288      
4 H 0.188      
5 H 0.188      
6 H 0.188      


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 -2.123 2.123
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.118 0.000 0.000
y 0.000 -34.118 0.000
z 0.000 0.000 -41.920
Traceless
 xyz
x 3.901 0.000 0.000
y 0.000 3.901 0.000
z 0.000 0.000 -7.802
Polar
3z2-r2-15.605
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 6.110 0.000 0.000
y 0.000 6.110 0.000
z 0.000 0.000 10.350


<r2> (average value of r2) Å2
<r2> 192.717
(<r2>)1/2 13.882