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: BLYP/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at BLYP/STO-3G
 hartrees
Energy at 0K-2782.915783
Energy at 298.15K 
HF Energy-2782.915783
Nuclear repulsion energy173.511172
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 BLYP/STO-3G
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 3158 2922 4.84 54.83 0.00 0.00
2 A1 1419 1313 0.07 1.42 0.34 0.51
3 A1 801 741 85.38 3.64 0.25 0.40
4 A1 392 363 8.18 10.30 0.29 0.44
5 E 3321 3072 14.49 39.88 0.75 0.86
5 E 3321 3072 14.49 39.88 0.75 0.86
6 E 1697 1570 0.03 15.62 0.75 0.86
6 E 1697 1570 0.03 15.62 0.75 0.86
7 E 725 671 43.24 0.29 0.75 0.86
7 E 725 671 43.24 0.29 0.75 0.86
8 E 117 108 38.55 0.08 0.75 0.86
8 E 117 108 38.55 0.08 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8743.8 cm-1
Scaled (by 0.9252) Zero Point Vibrational Energy (zpe) 8089.8 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 BLYP/STO-3G
ABC
5.31888 0.05988 0.05988

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.042
Mg2 0.000 0.000 -1.053
Br3 0.000 0.000 1.179
H4 0.000 1.024 -3.464
H5 0.887 -0.512 -3.464
H6 -0.887 -0.512 -3.464

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C11.98884.22081.10781.10781.1078
Mg21.98882.23202.62002.62002.6200
Br34.22082.23204.75534.75534.7553
H41.10782.62004.75531.77341.7734
H51.10782.62004.75531.77341.7734
H61.10782.62004.75531.77341.7734

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 112.445
Mg2 C1 H5 112.445 Mg2 C1 H6 112.445
H4 C1 H5 106.341 H4 C1 H6 106.341
H5 C1 H6 106.341
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.453      
2 Mg 0.801      
3 Br -0.425      
4 H 0.026      
5 H 0.026      
6 H 0.026      


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 -1.844 1.844
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.280 0.000 0.000
y 0.000 -29.280 0.000
z 0.000 0.000 -41.947
Traceless
 xyz
x 6.334 0.000 0.000
y 0.000 6.334 0.000
z 0.000 0.000 -12.667
Polar
3z2-r2-25.334
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 1.519 0.000 0.000
y 0.000 1.519 0.000
z 0.000 0.000 5.654


<r2> (average value of r2) Å2
<r2> 177.556
(<r2>)1/2 13.325