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

using model chemistry: mPW1PW91/6-31G(2df,p)

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(2df,p)
 hartrees
Energy at 0K-2812.078592
Energy at 298.15K 
HF Energy-2812.078592
Nuclear repulsion energy167.227817
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(2df,p)
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 2910 12.88 107.59 0.00 0.00
2 A1 1163 1110 1.72 52.01 0.12 0.21
3 A1 616 588 72.44 9.48 0.09 0.16
4 A1 309 295 11.71 19.67 0.15 0.26
5 E 3136 2994 10.24 113.13 0.75 0.86
5 E 3136 2994 10.24 113.11 0.75 0.86
6 E 1454 1388 0.26 2.81 0.75 0.86
6 E 1454 1388 0.26 2.81 0.75 0.86
7 E 579 553 87.21 2.26 0.75 0.86
7 E 579 553 87.21 2.26 0.75 0.86
8 E 117 112 23.00 0.75 0.75 0.86
8 E 117 112 23.00 0.75 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7854.6 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 7498.8 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 mPW1PW91/6-31G(2df,p)
ABC
5.38697 0.05535 0.05535

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.168
Mg2 0.000 0.000 -1.101
Br3 0.000 0.000 1.227
H4 0.000 1.017 -3.572
H5 0.881 -0.509 -3.572
H6 -0.881 -0.509 -3.572

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.06714.39541.09451.09451.0945
Mg22.06712.32842.67202.67202.6720
Br34.39542.32844.90584.90584.9058
H41.09452.67204.90581.76211.7621
H51.09452.67204.90581.76211.7621
H61.09452.67204.90581.76211.7621

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 111.644
Mg2 C1 H5 111.645 Mg2 C1 H6 111.645
H4 C1 H5 107.213 H4 C1 H6 107.213
H5 C1 H6 107.213
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.682      
2 Mg 0.374      
3 Br -0.157      
4 H 0.155      
5 H 0.155      
6 H 0.155      


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 -2.110 2.110
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.086 0.000 0.000
y 0.000 -34.086 0.000
z 0.000 0.000 -41.623
Traceless
 xyz
x 3.768 0.000 0.000
y 0.000 3.768 0.000
z 0.000 0.000 -7.536
Polar
3z2-r2-15.073
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 7.052 0.000 0.000
y 0.000 7.052 0.000
z 0.000 0.000 10.603


<r2> (average value of r2) Å2
<r2> 191.730
(<r2>)1/2 13.847