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

using model chemistry: CISD/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 CISD/3-21G*
 hartrees
Energy at 0K-2798.499197
Energy at 298.15K 
HF Energy-2798.249822
Nuclear repulsion energy167.402020
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 CISD/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 3051 2851 17.56      
2 A1 1294 1209 0.48      
3 A1 635 593 60.97      
4 A1 323 302 11.16      
5 E 3124 2919 15.93      
5 E 3124 2919 15.93      
6 E 1573 1470 0.06      
6 E 1573 1470 0.06      
7 E 660 616 107.36      
7 E 660 616 107.36      
8 E 124 116 24.89      
8 E 124 116 24.89      

Unscaled Zero Point Vibrational Energy (zpe) 8132.1 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 7598.6 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 CISD/3-21G*
ABC
5.29793 0.05531 0.05531

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.183
Mg2 0.000 0.000 -1.089
Br3 0.000 0.000 1.225
H4 0.000 1.026 -3.574
H5 0.888 -0.513 -3.574
H6 -0.888 -0.513 -3.574

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.09314.40801.09791.09791.0979
Mg22.09312.31492.68772.68772.6877
Br34.40802.31494.90764.90764.9076
H41.09792.68774.90761.77691.7769
H51.09792.68774.90761.77691.7769
H61.09792.68774.90761.77691.7769

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 110.870
Mg2 C1 H5 110.870 Mg2 C1 H6 110.870
H4 C1 H5 108.037 H4 C1 H6 108.037
H5 C1 H6 108.037
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability