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 MgCl2 (Magnesium dichloride)

using model chemistry: PBEPBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-1120.078202
Energy at 298.15K-1120.078169
Nuclear repulsion energy132.722897
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/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 308 305 0.00      
2 Σu 597 590 158.14      
3 Πu 106 105 55.80      
3 Πu 106 105 55.80      

Unscaled Zero Point Vibrational Energy (zpe) 558.3 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 551.9 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 PBEPBE/6-31+G**
B
0.04967

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31+G**

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Mg1 0.000 0.000 0.000
Cl2 0.000 0.000 2.203
Cl3 0.000 0.000 -2.203

Atom - Atom Distances (Å)
  Mg1 Cl2 Cl3
Mg12.20292.2029
Cl22.20294.4057
Cl32.20294.4057

picture of Magnesium dichloride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 Mg1 Cl3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 0.406      
2 Cl -0.203      
3 Cl -0.203      


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 0.000 0.000
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 4.947 0.000 0.000
y 0.000 4.947 0.000
z 0.000 0.000 9.782


<r2> (average value of r2) Å2
<r2> 189.731
(<r2>)1/2 13.774