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: B3PW91/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-2814.157964
Energy at 298.15K 
HF Energy-2814.157964
Nuclear repulsion energy165.336216
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/cc-pVDZ
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 3026 2920 18.54      
2 A1 1136 1096 1.52      
3 A1 603 581 74.15      
4 A1 298 287 14.63      
5 E 3121 3012 8.18      
5 E 3121 3012 8.19      
6 E 1421 1371 0.01      
6 E 1421 1371 0.01      
7 E 582 561 83.47      
7 E 582 561 83.47      
8 E 103 100 24.73      
8 E 103 100 24.73      

Unscaled Zero Point Vibrational Energy (zpe) 7756.7 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 7485.2 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/cc-pVDZ
ABC
5.28025 0.05418 0.05418

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -3.198
Mg2 0.000 0.000 -1.121
Br3 0.000 0.000 1.241
H4 0.000 1.028 -3.601
H5 0.890 -0.514 -3.601
H6 -0.890 -0.514 -3.601

Atom - Atom Distances (Å)
  C1 Mg2 Br3 H4 H5 H6
C12.07714.43871.10381.10381.1038
Mg22.07712.36162.68452.68452.6845
Br34.43872.36164.94954.94954.9495
H41.10382.68454.94951.77981.7798
H51.10382.68454.94951.77981.7798
H61.10382.68454.94951.77981.7798

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 111.412
Mg2 C1 H5 111.412 Mg2 C1 H6 111.412
H4 C1 H5 107.463 H4 C1 H6 107.463
H5 C1 H6 107.463
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.379      
2 Mg 0.534      
3 Br -0.329      
4 H 0.058      
5 H 0.058      
6 H 0.058      


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 -2.200 2.200
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -34.235 0.000 0.000
y 0.000 -34.235 0.000
z 0.000 0.000 -42.670
Traceless
 xyz
x 4.217 0.000 0.000
y 0.000 4.217 0.000
z 0.000 0.000 -8.435
Polar
3z2-r2-16.870
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 6.084 0.000 0.000
y 0.000 6.084 0.000
z 0.000 0.000 10.783


<r2> (average value of r2) Å2
<r2> 195.521
(<r2>)1/2 13.983