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: MP2=FULL/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=FULL/3-21G*
 hartrees
Energy at 0K-2798.517925
Energy at 298.15K 
HF Energy-2798.249791
Nuclear repulsion energy167.444143
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=FULL/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 3058 2899 9.34 88.12 0.00 0.00
2 A1 1273 1207 1.67 52.51 0.06 0.12
3 A1 632 599 57.61 10.48 0.04 0.08
4 A1 323 307 10.67 17.39 0.17 0.29
5 E 3140 2977 11.06 108.38 0.75 0.86
5 E 3140 2977 11.06 108.38 0.75 0.86
6 E 1567 1486 0.15 5.61 0.75 0.86
6 E 1567 1486 0.15 5.61 0.75 0.86
7 E 660 625 107.46 3.17 0.75 0.86
7 E 660 625 107.46 3.17 0.75 0.86
8 E 122 116 22.55 0.39 0.75 0.86
8 E 122 116 22.55 0.39 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8131.7 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 7708.9 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=FULL/3-21G*
ABC
5.27894 0.05533 0.05533

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.184
Mg2 0.000 0.000 -1.089
Br3 0.000 0.000 1.225
H4 0.000 1.028 -3.569
H5 0.890 -0.514 -3.569
H6 -0.890 -0.514 -3.569

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.09504.40881.09761.09761.0976
Mg22.09502.31382.68492.68492.6849
Br34.40882.31384.90324.90324.9032
H41.09762.68494.90321.78011.7801
H51.09762.68494.90321.78011.7801
H61.09762.68494.90321.78011.7801

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 110.557
Mg2 C1 H5 110.557 Mg2 C1 H6 110.557
H4 C1 H5 108.363 H4 C1 H6 108.363
H5 C1 H6 108.363
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability