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

using model chemistry: PBEPBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-2811.181983
Energy at 298.15K 
HF Energy-2811.181983
Nuclear repulsion energy165.289876
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 PBEPBE/6-31+G**
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 2973 2939 25.54 172.42 0.00 0.01
2 A1 1126 1113 0.81 133.26 0.13 0.23
3 A1 595 588 74.49 12.63 0.15 0.26
4 A1 292 288 15.82 29.00 0.17 0.29
5 E 3065 3030 8.83 125.22 0.75 0.86
5 E 3065 3030 8.83 125.22 0.75 0.86
6 E 1413 1397 0.41 0.91 0.75 0.86
6 E 1413 1397 0.41 0.91 0.75 0.86
7 E 602 595 72.57 5.47 0.75 0.86
7 E 602 595 72.57 5.47 0.75 0.86
8 E 152 150 21.86 1.25 0.75 0.86
8 E 152 150 21.86 1.24 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7723.7 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 7635.6 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 PBEPBE/6-31+G**
ABC
5.27016 0.05412 0.05412

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.202
Mg2 0.000 0.000 -1.119
Br3 0.000 0.000 1.241
H4 0.000 1.029 -3.602
H5 0.891 -0.514 -3.602
H6 -0.891 -0.514 -3.602

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.08364.44391.10351.10351.1035
Mg22.08362.36022.68802.68802.6880
Br34.44392.36024.95174.95174.9517
H41.10352.68804.95171.78151.7815
H51.10352.68804.95171.78151.7815
H61.10352.68804.95171.78151.7815

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 111.243
Mg2 C1 H5 111.243 Mg2 C1 H6 111.243
H4 C1 H5 107.643 H4 C1 H6 107.643
H5 C1 H6 107.643
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.900      
2 Mg 0.751      
3 Br -0.383      
4 H 0.177      
5 H 0.177      
6 H 0.177      


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 -2.244 2.244
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.104 0.000 0.000
y 0.000 -35.104 0.000
z 0.000 0.000 -43.408
Traceless
 xyz
x 4.152 0.000 0.000
y 0.000 4.152 0.000
z 0.000 0.000 -8.304
Polar
3z2-r2-16.609
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 6.943 0.000 0.000
y 0.000 6.943 0.000
z 0.000 0.000 13.016


<r2> (average value of r2) Å2
<r2> 196.251
(<r2>)1/2 14.009