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

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-2798.162996
Energy at 298.15K 
HF Energy-2797.996926
Nuclear repulsion energy162.160910
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 MP4/3-21G
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 3000 2909        
2 A1 1285 1246        
3 A1 605 587        
4 A1 292 283        
5 E 3075 2982        
5 E 3075 2982        
6 E 1542 1495        
6 E 1542 1495        
7 E 669 649        
7 E 669 649        
8 E 91 89        
8 E 91 88        

Unscaled Zero Point Vibrational Energy (zpe) 7968.0 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 7727.4 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 MP4/3-21G
ABC
5.27802 0.05201 0.05201

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.265
Mg2 0.000 0.000 -1.147
Br3 0.000 0.000 1.267
H4 0.000 1.028 -3.662
H5 0.890 -0.514 -3.662
H6 -0.890 -0.514 -3.662

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.11774.53181.10191.10191.1019
Mg22.11772.41412.71682.71682.7168
Br34.53182.41415.03505.03505.0350
H41.10192.71685.03501.78021.7802
H51.10192.71685.03501.78021.7802
H61.10192.71685.03501.78021.7802

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 111.131
Mg2 C1 H5 111.131 Mg2 C1 H6 111.131
H4 C1 H5 107.762 H4 C1 H6 107.762
H5 C1 H6 107.762
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability