return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: PBEPBE/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-2813.711125
Energy at 298.15K 
HF Energy-2813.711125
Nuclear repulsion energy165.330417
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/cc-pVTZ
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 2961 2941 17.19 168.19 0.00 0.00
2 A1 1108 1100 2.56 85.28 0.14 0.25
3 A1 591 587 73.12 12.69 0.10 0.19
4 A1 291 289 14.34 25.92 0.17 0.30
5 E 3043 3022 10.02 121.04 0.75 0.86
5 E 3043 3022 10.02 121.02 0.75 0.86
6 E 1401 1391 0.01 0.74 0.75 0.86
6 E 1401 1391 0.01 0.74 0.75 0.86
7 E 574 570 66.46 5.21 0.75 0.86
7 E 574 570 66.46 5.21 0.75 0.86
8 E 98 97 22.07 0.98 0.75 0.86
8 E 98 97 22.07 0.98 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7590.7 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 7538.4 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 PBEPBE/cc-pVTZ
ABC
5.30619 0.05414 0.05414

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.201
Mg2 0.000 0.000 -1.120
Br3 0.000 0.000 1.241
H4 0.000 1.025 -3.600
H5 0.888 -0.513 -3.600
H6 -0.888 -0.513 -3.600

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.08104.44231.09981.09981.0998
Mg22.08102.36142.68302.68302.6830
Br34.44232.36144.94824.94824.9482
H41.09982.68304.94821.77551.7755
H51.09982.68304.94821.77551.7755
H61.09982.68304.94821.77551.7755

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/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.485      
2 Mg 0.540      
3 Br -0.357      
4 H 0.101      
5 H 0.101      
6 H 0.101      


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 -2.225 2.225
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.820 0.000 0.000
y 0.000 -34.820 0.000
z 0.000 0.000 -42.871
Traceless
 xyz
x 4.026 0.000 0.000
y 0.000 4.026 0.000
z 0.000 0.000 -8.051
Polar
3z2-r2-16.103
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 7.279 0.000 0.000
y 0.000 7.279 0.000
z 0.000 0.000 12.519


<r2> (average value of r2) Å2
<r2> 195.909
(<r2>)1/2 13.997