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

using model chemistry: TPSSh/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 TPSSh/3-21G*
 hartrees
Energy at 0K-2800.653020
Energy at 298.15K 
HF Energy-2800.653020
Nuclear repulsion energy167.433897
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 TPSSh/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 3005 2902 19.60 92.56 0.00 0.00
2 A1 1249 1206 0.42 49.85 0.04 0.07
3 A1 623 602 61.70 9.95 0.04 0.07
4 A1 316 305 10.34 18.17 0.16 0.28
5 E 3080 2974 15.76 120.61 0.75 0.86
5 E 3080 2974 15.76 120.61 0.75 0.86
6 E 1538 1485 0.09 5.73 0.75 0.86
6 E 1538 1485 0.09 5.73 0.75 0.86
7 E 651 628 101.08 3.25 0.75 0.86
7 E 651 628 101.08 3.25 0.75 0.86
8 E 122 118 21.77 0.28 0.75 0.86
8 E 122 118 21.77 0.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 7986.8 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 7712.9 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 TPSSh/3-21G*
ABC
5.28563 0.05539 0.05539

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.177
Mg2 0.000 0.000 -1.091
Br3 0.000 0.000 1.225
H4 0.000 1.027 -3.574
H5 0.889 -0.514 -3.574
H6 -0.889 -0.514 -3.574

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.08584.40191.10101.10101.1010
Mg22.08582.31602.68662.68662.6866
Br34.40192.31604.90724.90724.9072
H41.10102.68664.90721.77891.7789
H51.10102.68664.90721.77891.7789
H61.10102.68664.90721.77891.7789

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 111.116
Mg2 C1 H5 111.116 Mg2 C1 H6 111.116
H4 C1 H5 107.777 H4 C1 H6 107.777
H5 C1 H6 107.777
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.968      
2 Mg 0.691      
3 Br -0.336      
4 H 0.204      
5 H 0.204      
6 H 0.204      


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 -1.798 1.798
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.987 0.000 0.000
y 0.000 5.986 0.000
z 0.000 0.000 10.036


<r2> (average value of r2) Å2
<r2> 191.727
(<r2>)1/2 13.847