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

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-2798.498477
Energy at 298.15K 
HF Energy-2798.249784
Nuclear repulsion energy167.267429
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 MP2/3-21G*
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 3057 2908 9.36 88.08 0.00 0.00
2 A1 1273 1211 1.59 51.92 0.06 0.12
3 A1 629 599 57.71 10.48 0.04 0.08
4 A1 322 306 10.80 17.21 0.17 0.29
5 E 3139 2986 11.31 108.41 0.75 0.86
5 E 3139 2986 11.31 108.41 0.75 0.86
6 E 1567 1491 0.15 5.63 0.75 0.86
6 E 1567 1491 0.15 5.63 0.75 0.86
7 E 658 626 107.61 3.19 0.75 0.86
7 E 658 626 107.61 3.19 0.75 0.86
8 E 122 116 22.73 0.38 0.75 0.86
8 E 122 116 22.73 0.38 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8126.6 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 7730.9 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 MP2/3-21G*
ABC
5.27763 0.05522 0.05522

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.187
Mg2 0.000 0.000 -1.091
Br3 0.000 0.000 1.226
H4 0.000 1.028 -3.572
H5 0.890 -0.514 -3.572
H6 -0.890 -0.514 -3.572

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.09624.41311.09781.09781.0978
Mg22.09622.31692.68622.68622.6862
Br34.41312.31694.90754.90754.9075
H41.09782.68624.90751.78031.7803
H51.09782.68624.90751.78031.7803
H61.09782.68624.90751.78031.7803

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 110.565
Mg2 C1 H5 110.565 Mg2 C1 H6 110.565
H4 C1 H5 108.356 H4 C1 H6 108.356
H5 C1 H6 108.356
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability