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

using model chemistry: PM3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at PM3
 hartrees
Energy at 0K 
Energy at 298.15K-0.047317
HF Energy-0.047317
Nuclear repulsion energy36.340825
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 PM3
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 3281 3196 7.47 112.09 0.00 0.00
2 A1 1381 1345 0.52 15.44 0.00 0.00
3 A1 1057 1029 67.94 2.43 0.09 0.16
4 A1 420 409 21.38 30.47 0.30 0.46
5 E 3201 3118 4.86 91.22 0.75 0.86
5 E 3201 3118 4.86 91.22 0.75 0.86
6 E 1401 1364 0.63 28.59 0.75 0.86
6 E 1401 1364 0.63 28.59 0.75 0.86
7 E 843 821 79.69 0.11 0.75 0.86
7 E 843 821 79.69 0.11 0.75 0.86
8 E 30 29 44.60 0.02 0.75 0.86
8 E 30 29 44.60 0.02 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8543.7 cm-1
Scaled (by 0.974) Zero Point Vibrational Energy (zpe) 8321.6 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 PM3
ABC
5.30338 0.05786 0.05786

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM3

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.035
Mg2 0.000 0.000 -1.161
Br3 0.000 0.000 1.210
H4 0.000 1.025 -3.403
H5 0.888 -0.513 -3.403
H6 -0.888 -0.513 -3.403

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C11.87344.24511.08951.08951.0895
Mg21.87342.37162.46512.46512.4651
Br34.24512.37164.72604.72604.7260
H41.08952.46514.72601.77591.7759
H51.08952.46514.72601.77591.7759
H61.08952.46514.72601.77591.7759

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 109.759
Mg2 C1 H5 109.759 Mg2 C1 H6 109.759
H4 C1 H5 109.182 H4 C1 H6 109.182
H5 C1 H6 109.182
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability