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: B2PLYP/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B2PLYP/6-31G
 hartrees
Energy at 0K-2810.921278
Energy at 298.15K 
HF Energy-2810.872856
Nuclear repulsion energy164.092339
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 B2PLYP/6-31G
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 3048 3048 23.86 118.46 0.00 0.00
2 A1 1261 1261 0.13 55.07 0.07 0.13
3 A1 618 618 39.84 16.85 0.07 0.13
4 A1 298 298 12.39 21.88 0.21 0.35
5 E 3139 3139 16.39 137.01 0.75 0.86
5 E 3139 3139 16.39 137.01 0.75 0.86
6 E 1524 1524 0.48 8.11 0.75 0.86
6 E 1524 1524 0.48 8.11 0.75 0.86
7 E 666 666 102.26 3.27 0.75 0.86
7 E 666 666 102.26 3.28 0.75 0.86
8 E 131 131 26.41 0.05 0.75 0.86
8 E 131 131 26.41 0.05 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8072.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8072.3 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 B2PLYP/6-31G
ABC
5.30812 0.05343 0.05343

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.214
Mg2 0.000 0.000 -1.141
Br3 0.000 0.000 1.251
H4 0.000 1.025 -3.605
H5 0.888 -0.512 -3.605
H6 -0.888 -0.512 -3.605

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.07324.46511.09711.09711.0971
Mg22.07322.39192.66932.66932.6693
Br34.46512.39194.96354.96354.9635
H41.09712.66934.96351.77521.7752
H51.09712.66934.96351.77521.7752
H61.09712.66934.96351.77521.7752

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 110.905
Mg2 C1 H5 110.905 Mg2 C1 H6 110.905
H4 C1 H5 108.000 H4 C1 H6 108.000
H5 C1 H6 108.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.816      
2 Mg 0.765      
3 Br -0.425      
4 H 0.159      
5 H 0.159      
6 H 0.159      


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 -3.029 3.029
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.763 0.000 0.000
y 0.000 -34.763 0.000
z 0.000 0.000 -44.477
Traceless
 xyz
x 4.857 0.000 0.000
y 0.000 4.857 0.000
z 0.000 0.000 -9.714
Polar
3z2-r2-19.428
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 4.933 0.000 0.000
y 0.000 4.933 0.000
z 0.000 0.000 10.596


<r2> (average value of r2) Å2
<r2> 198.242
(<r2>)1/2 14.080