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

using model chemistry: mPW1PW91/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 mPW1PW91/STO-3G
 hartrees
Energy at 0K-2783.338329
Energy at 298.15K 
HF Energy-2783.338329
Nuclear repulsion energy174.941288
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/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 3311 2910 1.92 50.46 0.00 0.00
2 A1 1479 1300 0.90 1.38 0.31 0.47
3 A1 841 739 92.37 3.52 0.26 0.42
4 A1 410 360 9.58 7.47 0.29 0.45
5 E 3488 3066 8.94 36.88 0.75 0.86
5 E 3488 3066 8.94 36.88 0.75 0.86
6 E 1755 1542 0.12 14.95 0.75 0.86
6 E 1755 1542 0.12 14.95 0.75 0.86
7 E 749 658 51.02 0.30 0.75 0.86
7 E 749 658 51.02 0.30 0.75 0.86
8 E 122 108 45.54 0.06 0.75 0.86
8 E 122 108 45.54 0.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9134.0 cm-1
Scaled (by 0.8789) Zero Point Vibrational Energy (zpe) 8027.8 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 mPW1PW91/STO-3G
ABC
5.43968 0.06091 0.06091

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/STO-3G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.012
Mg2 0.000 0.000 -1.048
Br3 0.000 0.000 1.170
H4 0.000 1.012 -3.432
H5 0.877 -0.506 -3.432
H6 -0.877 -0.506 -3.432

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C11.96484.18221.09571.09571.0957
Mg21.96482.21742.58992.58992.5899
Br34.18222.21744.71134.71134.7113
H41.09572.58994.71131.75361.7536
H51.09572.58994.71131.75361.7536
H61.09572.58994.71131.75361.7536

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 112.484
Mg2 C1 H5 112.484 Mg2 C1 H6 112.484
H4 C1 H5 106.297 H4 C1 H6 106.297
H5 C1 H6 106.297
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.488      
2 Mg 0.855      
3 Br -0.462      
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 -2.101 2.101
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.142 0.000 0.000
y 0.000 -29.142 0.000
z 0.000 0.000 -42.276
Traceless
 xyz
x 6.567 0.000 0.000
y 0.000 6.567 0.000
z 0.000 0.000 -13.134
Polar
3z2-r2-26.268
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 1.432 0.000 0.000
y 0.000 1.432 0.000
z 0.000 0.000 5.003


<r2> (average value of r2) Å2
<r2> 174.850
(<r2>)1/2 13.223