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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-2811.907501
Energy at 298.15K 
HF Energy-2811.907501
Nuclear repulsion energy166.735720
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 2903 16.24 104.21 0.00 0.00
2 A1 1211 1149 1.09 56.29 0.07 0.13
3 A1 615 583 69.42 11.38 0.08 0.15
4 A1 307 292 13.62 18.51 0.18 0.30
5 E 3147 2985 11.69 123.32 0.75 0.86
5 E 3147 2985 11.69 123.31 0.75 0.86
6 E 1497 1420 0.01 4.33 0.75 0.86
6 E 1497 1420 0.01 4.33 0.75 0.86
7 E 618 586 89.88 2.58 0.75 0.86
7 E 618 586 89.88 2.57 0.75 0.86
8 E 127 120 24.75 0.48 0.75 0.86
8 E 127 120 24.75 0.48 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7986.5 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 7573.6 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
5.37331 0.05501 0.05501

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 -3.179
Mg2 0.000 0.000 -1.105
Br3 0.000 0.000 1.231
H4 0.000 1.019 -3.582
H5 0.882 -0.509 -3.582
H6 -0.882 -0.509 -3.582

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.07384.40941.09561.09561.0956
Mg22.07382.33562.67842.67842.6784
Br34.40942.33564.91944.91944.9194
H41.09562.67844.91941.76441.7644
H51.09562.67844.91941.76441.7644
H61.09562.67844.91941.76441.7644

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 111.603
Mg2 C1 H5 111.603 Mg2 C1 H6 111.603
H4 C1 H5 107.258 H4 C1 H6 107.258
H5 C1 H6 107.258
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 -0.840      
2 Mg 0.574      
3 Br -0.292      
4 H 0.186      
5 H 0.186      
6 H 0.186      


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 -2.117 2.117
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.055 0.000 0.000
y 0.000 -34.055 0.000
z 0.000 0.000 -42.033
Traceless
 xyz
x 3.989 0.000 0.000
y 0.000 3.989 0.000
z 0.000 0.000 -7.978
Polar
3z2-r2-15.957
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 6.111 0.000 0.000
y 0.000 6.111 0.000
z 0.000 0.000 10.302


<r2> (average value of r2) Å2
<r2> 192.822
(<r2>)1/2 13.886