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

using model chemistry: MP2/CEP-31G

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/CEP-31G
 hartrees
Energy at 0K-21.326176
Energy at 298.15K 
HF Energy-21.200220
Nuclear repulsion energy18.211340
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/CEP-31G
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 3003 2902 43.55 117.22 0.02 0.04
2 A1 1256 1214 0.87 141.64 0.18 0.31
3 A1 566 547 55.60 5.85 0.16 0.28
4 A1 268 259 15.07 27.91 0.23 0.38
5 E 3114 3009 40.25 155.83 0.75 0.86
5 E 3114 3009 40.25 155.83 0.75 0.86
6 E 1471 1421 1.58 7.53 0.75 0.86
6 E 1471 1421 1.58 7.53 0.75 0.86
7 E 648 626 97.44 3.53 0.75 0.86
7 E 648 626 97.44 3.53 0.75 0.86
8 E 109 105 26.18 0.05 0.75 0.86
8 E 109 105 26.18 0.05 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7888.1 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 7622.3 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/CEP-31G
ABC
5.12319 0.05123 0.05123

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.288
Mg2 0.000 0.000 -1.160
Br3 0.000 0.000 1.277
H4 0.000 1.043 -3.680
H5 0.903 -0.522 -3.680
H6 -0.903 -0.522 -3.680

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.12854.56521.11411.11411.1141
Mg22.12852.43672.72712.72712.7271
Br34.56522.43675.06505.06505.0650
H41.11412.72715.06501.80691.8069
H51.11412.72715.06501.80691.8069
H61.11412.72715.06501.80691.8069

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 110.554
Mg2 C1 H5 110.554 Mg2 C1 H6 110.554
H4 C1 H5 108.367 H4 C1 H6 108.367
H5 C1 H6 108.367
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability