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

using model chemistry: MP2/CEP-121G

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-121G
 hartrees
Energy at 0K-21.342879
Energy at 298.15K 
HF Energy-21.208184
Nuclear repulsion energy18.339293
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-121G
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 2943 2872 38.63 160.11 0.00 0.00
2 A1 1249 1219 0.13 90.01 0.14 0.25
3 A1 588 573 45.62 17.62 0.13 0.23
4 A1 274 267 16.54 22.93 0.20 0.33
5 E 3054 2980 22.11 147.30 0.75 0.86
5 E 3054 2980 22.11 147.29 0.75 0.86
6 E 1466 1431 0.89 8.17 0.75 0.86
6 E 1466 1431 0.89 8.17 0.75 0.86
7 E 647 631 97.11 5.06 0.75 0.86
7 E 647 631 97.11 5.06 0.75 0.86
8 E 115 112 27.53 0.03 0.75 0.86
8 E 115 112 27.53 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7807.8 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 7620.4 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 MP2/CEP-121G
ABC
5.23361 0.05177 0.05177

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.261
Mg2 0.000 0.000 -1.164
Br3 0.000 0.000 1.272
H4 0.000 1.032 -3.659
H5 0.894 -0.516 -3.659
H6 -0.894 -0.516 -3.659

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.09764.53291.10621.10621.1062
Mg22.09762.43532.70052.70052.7005
Br34.53292.43535.03775.03775.0377
H41.10622.70055.03771.78771.7877
H51.10622.70055.03771.78771.7877
H61.10622.70055.03771.78771.7877

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 111.079
Mg2 C1 H5 111.079 Mg2 C1 H6 111.079
H4 C1 H5 107.816 H4 C1 H6 107.816
H5 C1 H6 107.816
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability