return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: TPSSh/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 TPSSh/6-31G*
 hartrees
Energy at 0K-2811.649999
Energy at 298.15K 
HF Energy-2811.649999
Nuclear repulsion energy166.071522
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 TPSSh/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 3028 2905 24.99 106.46 0.00 0.00
2 A1 1219 1170 5.69 62.87 0.06 0.10
3 A1 604 579 68.63 11.48 0.07 0.13
4 A1 303 291 13.12 19.68 0.17 0.29
5 E 3104 2978 18.80 135.20 0.75 0.86
5 E 3104 2978 18.81 135.20 0.75 0.86
6 E 1506 1445 0.19 4.29 0.75 0.86
6 E 1506 1445 0.19 4.29 0.75 0.86
7 E 613 588 88.68 3.32 0.75 0.86
7 E 613 588 88.69 3.32 0.75 0.86
8 E 125 120 24.24 0.50 0.75 0.86
8 E 125 120 24.24 0.50 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7925.0 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 7603.3 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 TPSSh/6-31G*
ABC
5.35838 0.05453 0.05453

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.194
Mg2 0.000 0.000 -1.108
Br3 0.000 0.000 1.236
H4 0.000 1.020 -3.601
H5 0.883 -0.510 -3.601
H6 -0.883 -0.510 -3.601

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.08664.43011.09811.09811.0981
Mg22.08662.34342.69382.69382.6938
Br34.43012.34344.94304.94304.9430
H41.09812.69384.94301.76681.7668
H51.09812.69384.94301.76681.7668
H61.09812.69384.94301.76681.7668

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 111.729
Mg2 C1 H5 111.729 Mg2 C1 H6 111.729
H4 C1 H5 107.122 H4 C1 H6 107.122
H5 C1 H6 107.122
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.787      
2 Mg 0.572      
3 Br -0.295      
4 H 0.170      
5 H 0.170      
6 H 0.170      


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 -2.067 2.067
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.249 0.000 0.000
y 0.000 6.249 0.000
z 0.000 0.000 10.566


<r2> (average value of r2) Å2
<r2> 194.455
(<r2>)1/2 13.945