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

using model chemistry: PBEPBEultrafine/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at PBEPBEultrafine/3-21G
 hartrees
Energy at 0K-2799.875596
Energy at 298.15K 
HF Energy-2799.875596
Nuclear repulsion energy162.951234
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 PBEPBEultrafine/3-21G
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 2966 2939 10.73 110.63 0.01 0.01
2 A1 1201 1190 0.11 55.06 0.02 0.03
3 A1 611 606 38.32 15.12 0.03 0.06
4 A1 290 288 9.26 24.07 0.19 0.32
5 E 3053 3025 8.39 122.27 0.75 0.86
5 E 3053 3025 8.39 122.27 0.75 0.86
6 E 1490 1477 0.24 6.50 0.75 0.86
6 E 1490 1477 0.24 6.50 0.75 0.86
7 E 659 653 105.07 4.02 0.75 0.86
7 E 659 653 105.07 4.02 0.75 0.86
8 E 90 90 17.60 0.01 0.75 0.86
8 E 90 90 17.60 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7826.6 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 7755.4 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 PBEPBEultrafine/3-21G
ABC
5.22321 0.05266 0.05266

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.240
Mg2 0.000 0.000 -1.146
Br3 0.000 0.000 1.260
H4 0.000 1.033 -3.634
H5 0.895 -0.517 -3.634
H6 -0.895 -0.517 -3.634

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.09314.49941.10571.10571.1057
Mg22.09312.40632.69312.69312.6931
Br34.49942.40635.00125.00125.0012
H41.10572.69315.00121.78951.7895
H51.10572.69315.00121.78951.7895
H61.10572.69315.00121.78951.7895

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 110.873
Mg2 C1 H5 110.873 Mg2 C1 H6 110.873
H4 C1 H5 108.034 H4 C1 H6 108.034
H5 C1 H6 108.034
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.986      
2 Mg 0.686      
3 Br -0.373      
4 H 0.224      
5 H 0.224      
6 H 0.224      


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 -2.610 2.610
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.771 0.000 0.000
y 0.000 -34.771 0.000
z 0.000 0.000 -41.914
Traceless
 xyz
x 3.572 0.000 0.000
y 0.000 3.572 0.000
z 0.000 0.000 -7.143
Polar
3z2-r2-14.286
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 5.395 0.000 0.000
y 0.000 5.395 0.000
z 0.000 0.000 11.443


<r2> (average value of r2) Å2
<r2> 200.305
(<r2>)1/2 14.153