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

using model chemistry: B3PW91/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 B3PW91/STO-3G
 hartrees
Energy at 0K-2783.087294
Energy at 298.15K 
HF Energy-2783.087294
Nuclear repulsion energy174.695908
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 B3PW91/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 3285 2908 2.17 50.85 0.00 0.00
2 A1 1467 1298 0.68 1.40 0.31 0.47
3 A1 834 738 91.25 3.54 0.26 0.42
4 A1 406 360 9.42 7.85 0.29 0.45
5 E 3460 3062 9.43 37.13 0.75 0.86
5 E 3460 3062 9.43 37.14 0.75 0.86
6 E 1744 1543 0.12 14.96 0.75 0.86
6 E 1744 1543 0.12 14.96 0.75 0.86
7 E 745 659 50.23 0.29 0.75 0.86
7 E 745 659 50.23 0.29 0.75 0.86
8 E 122 108 44.43 0.07 0.75 0.86
8 E 122 108 44.43 0.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9066.6 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 8023.9 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 B3PW91/STO-3G
ABC
5.41894 0.06074 0.06074

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.017
Mg2 0.000 0.000 -1.049
Br3 0.000 0.000 1.171
H4 0.000 1.014 -3.437
H5 0.878 -0.507 -3.437
H6 -0.878 -0.507 -3.437

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C11.96864.18871.09771.09771.0977
Mg21.96862.22002.59472.59472.5947
Br34.18872.22004.71864.71864.7186
H41.09772.59474.71861.75691.7569
H51.09772.59474.71861.75691.7569
H61.09772.59474.71861.75691.7569

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 112.474
Mg2 C1 H5 112.474 Mg2 C1 H6 112.474
H4 C1 H5 106.309 H4 C1 H6 106.309
H5 C1 H6 106.309
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.484      
2 Mg 0.847      
3 Br -0.457      
4 H 0.032      
5 H 0.032      
6 H 0.032      


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 -2.077 2.077
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.157 0.000 0.000
y 0.000 -29.157 0.000
z 0.000 0.000 -42.196
Traceless
 xyz
x 6.519 0.000 0.000
y 0.000 6.519 0.000
z 0.000 0.000 -13.039
Polar
3z2-r2-26.077
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 1.449 0.000 0.000
y 0.000 1.449 0.000
z 0.000 0.000 5.097


<r2> (average value of r2) Å2
<r2> 175.294
(<r2>)1/2 13.240