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: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-2811.912207
Energy at 298.15K 
HF Energy-2811.912207
Nuclear repulsion energy166.762001
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 mPW1PW91/6-31G**
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 3061 2912 15.66 110.43 0.00 0.00
2 A1 1189 1131 1.52 53.48 0.07 0.13
3 A1 615 586 70.81 11.45 0.08 0.15
4 A1 308 293 13.43 18.56 0.18 0.30
5 E 3152 2999 10.89 121.96 0.75 0.86
5 E 3152 2999 10.89 121.95 0.75 0.86
6 E 1476 1405 0.01 4.19 0.75 0.86
6 E 1476 1405 0.01 4.19 0.75 0.86
7 E 612 583 88.09 2.69 0.75 0.86
7 E 612 583 88.09 2.69 0.75 0.86
8 E 127 121 24.66 0.47 0.75 0.86
8 E 127 121 24.66 0.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7953.7 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 7568.0 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 mPW1PW91/6-31G**
ABC
5.38149 0.05502 0.05502

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.178
Mg2 0.000 0.000 -1.105
Br3 0.000 0.000 1.231
H4 0.000 1.018 -3.580
H5 0.882 -0.509 -3.580
H6 -0.882 -0.509 -3.580

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.07354.40901.09441.09441.0944
Mg22.07352.33552.67662.67662.6766
Br34.40902.33554.91764.91764.9176
H41.09442.67664.91761.76301.7630
H51.09442.67664.91761.76301.7630
H61.09442.67664.91761.76301.7630

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 111.553
Mg2 C1 H5 111.553 Mg2 C1 H6 111.553
H4 C1 H5 107.312 H4 C1 H6 107.312
H5 C1 H6 107.312
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.688      
2 Mg 0.554      
3 Br -0.292      
4 H 0.142      
5 H 0.142      
6 H 0.142      


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 -2.125 2.125
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.065 0.000 0.000
y 0.000 -34.065 0.000
z 0.000 0.000 -41.934
Traceless
 xyz
x 3.934 0.000 0.000
y 0.000 3.934 0.000
z 0.000 0.000 -7.869
Polar
3z2-r2-15.738
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 6.142 0.000 0.000
y 0.000 6.142 0.000
z 0.000 0.000 10.332


<r2> (average value of r2) Å2
<r2> 192.750
(<r2>)1/2 13.883