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

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-2800.433136
Energy at 298.15K 
HF Energy-2800.433136
Nuclear repulsion energy163.454905
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 B3PW91/3-21G
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 3031 2913 14.66      
2 A1 1251 1202 0.59      
3 A1 625 601 44.96      
4 A1 295 284 10.52      
5 E 3114 2993 10.62      
5 E 3114 2993 10.62      
6 E 1531 1472 0.57      
6 E 1531 1472 0.57      
7 E 671 645 112.18      
7 E 671 645 112.18      
8 E 95 92 23.94      
8 E 95 92 23.94      

Unscaled Zero Point Vibrational Energy (zpe) 8011.5 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 7700.6 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 B3PW91/3-21G
ABC
5.31063 0.05298 0.05298

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.228
Mg2 0.000 0.000 -1.144
Br3 0.000 0.000 1.256
H4 0.000 1.025 -3.624
H5 0.887 -0.512 -3.624
H6 -0.887 -0.512 -3.624

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.08314.48391.09881.09881.0988
Mg22.08312.40082.68322.68322.6832
Br34.48392.40084.98714.98714.9871
H41.09882.68324.98711.77471.7747
H51.09882.68324.98711.77471.7747
H61.09882.68324.98711.77471.7747

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 111.169
Mg2 C1 H5 111.169 Mg2 C1 H6 111.169
H4 C1 H5 107.721 H4 C1 H6 107.721
H5 C1 H6 107.721
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.034      
2 Mg 0.780      
3 Br -0.419      
4 H 0.225      
5 H 0.225      
6 H 0.225      


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 -2.720 2.720
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.354 0.000 0.000
y 0.000 -34.354 0.000
z 0.000 0.000 -43.332
Traceless
 xyz
x 4.489 0.000 0.000
y 0.000 4.489 0.000
z 0.000 0.000 -8.978
Polar
3z2-r2-17.955
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 4.976 0.000 0.000
y 0.000 4.976 0.000
z 0.000 0.000 10.471


<r2> (average value of r2) Å2
<r2> 199.345
(<r2>)1/2 14.119