return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: QCISD/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-2812.247549
Energy at 298.15K 
HF Energy-2811.732661
Nuclear repulsion energy165.676912
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/Def2TZVPP
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 3034 3034 23.26      
2 A1 1177 1177 0.30      
3 A1 608 608 82.12      
4 A1 301 301 14.21      
5 E 3112 3112 16.26      
5 E 3112 3112 16.26      
6 E 1467 1467 0.14      
6 E 1467 1467 0.14      
7 E 578 578 75.49      
7 E 578 578 75.49      
8 E 102 102 30.50      
8 E 102 102 30.50      

Unscaled Zero Point Vibrational Energy (zpe) 7818.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 7818.6 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 QCISD/Def2TZVPP
ABC
5.40424 0.05430 0.05430

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/Def2TZVPP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.198
Mg2 0.000 0.000 -1.116
Br3 0.000 0.000 1.239
H4 0.000 1.016 -3.600
H5 0.880 -0.508 -3.600
H6 -0.880 -0.508 -3.600

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.08174.43691.09241.09241.0924
Mg22.08172.35522.68332.68332.6833
Br34.43692.35524.94434.94434.9443
H41.09242.68334.94431.75931.7593
H51.09242.68334.94431.75931.7593
H61.09242.68334.94431.75931.7593

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 111.590
Mg2 C1 H5 111.590 Mg2 C1 H6 111.590
H4 C1 H5 107.272 H4 C1 H6 107.272
H5 C1 H6 107.272
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability