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

using model chemistry: QCISD(T)/TZVP

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(T)/TZVP
 hartrees
Energy at 0K-2812.151512
Energy at 298.15K 
HF Energy-2811.717181
Nuclear repulsion energy164.314060
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(T)/TZVP
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 3036 2924        
2 A1 1222 1177        
3 A1 587 565        
4 A1 291 280        
5 E 3118 3003        
5 E 3118 3003        
6 E 1433 1380        
6 E 1432 1380        
7 E 604 582        
7 E 604 582        
8 E 103 99        
8 E 102 99        

Unscaled Zero Point Vibrational Energy (zpe) 7824.8 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 7536.9 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(T)/TZVP
ABC
5.40460 0.05340 0.05340

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/TZVP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.221
Mg2 0.000 0.000 -1.128
Br3 0.000 0.000 1.250
H4 0.000 1.016 -3.629
H5 0.880 -0.508 -3.629
H6 -0.880 -0.508 -3.629

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.09274.47131.09451.09451.0945
Mg22.09272.37852.69892.69892.6989
Br34.47132.37854.98364.98364.9836
H41.09452.69894.98361.75921.7592
H51.09452.69894.98361.75921.7592
H61.09452.69894.98361.75921.7592

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 111.875
Mg2 C1 H5 111.875 Mg2 C1 H6 111.875
H4 C1 H5 106.964 H4 C1 H6 106.964
H5 C1 H6 106.964
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability