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

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-2798.162483
Energy at 298.15K 
HF Energy-2797.996918
Nuclear repulsion energy162.167967
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 QCISD/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 2994 2902 22.00      
2 A1 1287 1248 2.95      
3 A1 605 586 39.48      
4 A1 292 283 9.65      
5 E 3064 2970 19.30      
5 E 3064 2970 19.30      
6 E 1542 1495 0.00      
6 E 1542 1495 0.00      
7 E 670 649 110.72      
7 E 670 649 110.72      
8 E 92 89 24.30      
8 E 92 89 24.30      

Unscaled Zero Point Vibrational Energy (zpe) 7956.9 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 7711.8 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 QCISD/3-21G
ABC
5.27954 0.05202 0.05202

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.264
Mg2 0.000 0.000 -1.147
Br3 0.000 0.000 1.267
H4 0.000 1.028 -3.663
H5 0.890 -0.514 -3.663
H6 -0.890 -0.514 -3.663

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.11724.53121.10221.10221.1022
Mg22.11722.41402.71752.71752.7175
Br34.53122.41405.03575.03575.0357
H41.10222.71755.03571.77991.7799
H51.10222.71755.03571.77991.7800
H61.10222.71755.03571.77991.7800

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 111.194
Mg2 C1 H5 111.194 Mg2 C1 H6 111.194
H4 C1 H5 107.695 H4 C1 H6 107.695
H5 C1 H6 107.695
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability