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: HSEh1PBE/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 HSEh1PBE/3-21G
 hartrees
Energy at 0K-2800.010302
Energy at 298.15K 
HF Energy-2800.010302
Nuclear repulsion energy163.703581
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 HSEh1PBE/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 3046 2934 12.78 102.05 0.00 0.00
2 A1 1252 1206 0.73 50.94 0.03 0.06
3 A1 630 607 43.51 15.55 0.05 0.10
4 A1 297 287 10.48 20.06 0.20 0.33
5 E 3133 3018 9.11 124.26 0.75 0.86
5 E 3133 3018 9.11 124.29 0.75 0.86
6 E 1534 1478 0.70 7.40 0.75 0.86
6 E 1534 1478 0.70 7.40 0.75 0.86
7 E 673 648 113.06 4.09 0.75 0.86
7 E 673 648 113.06 4.09 0.75 0.86
8 E 96 92 23.43 0.00 0.75 0.86
8 E 96 92 23.43 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8047.9 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 7752.5 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 HSEh1PBE/3-21G
ABC
5.31272 0.05315 0.05315

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.223
Mg2 0.000 0.000 -1.143
Br3 0.000 0.000 1.254
H4 0.000 1.024 -3.618
H5 0.887 -0.512 -3.618
H6 -0.887 -0.512 -3.618

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.08014.47711.09791.09791.0979
Mg22.08012.39702.67852.67852.6785
Br34.47712.39704.97844.97844.9784
H41.09792.67854.97841.77441.7744
H51.09792.67854.97841.77441.7744
H61.09792.67854.97841.77441.7744

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 111.075
Mg2 C1 H5 111.075 Mg2 C1 H6 111.075
H4 C1 H5 107.820 H4 C1 H6 107.820
H5 C1 H6 107.820
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.043      
2 Mg 0.772      
3 Br -0.414      
4 H 0.228      
5 H 0.228      
6 H 0.228      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.713 2.713
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.456 0.000 0.000
y 0.000 -34.456 0.000
z 0.000 0.000 -43.235
Traceless
 xyz
x 4.389 0.000 0.000
y 0.000 4.389 0.000
z 0.000 0.000 -8.779
Polar
3z2-r2-17.558
x2-y20.000
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.947 0.000 0.000
y 0.000 4.947 -0.000
z 0.000 -0.000 10.483


<r2> (average value of r2) Å2
<r2> 198.809
(<r2>)1/2 14.100