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All results from a given calculation for MgH2 (magnesium dihydride)

using model chemistry: TPSSh/6-31G*

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 TPSSh/6-31G*
 hartrees
Energy at 0K-201.236980
Energy at 298.15K-201.238191
HF Energy-201.236980
Nuclear repulsion energy7.547352
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/6-31G*
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 1600 1535 0.00      
2 Σu 1633 1566 375.47      
3 Πu 455 437 475.36      
3 Πu 455 437 475.36      

Unscaled Zero Point Vibrational Energy (zpe) 2071.9 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 1987.7 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/6-31G*
B
2.83424

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

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Mg1 0.000 0.000 0.000
H2 0.000 0.000 1.718
H3 0.000 0.000 -1.718

Atom - Atom Distances (Å)
  Mg1 H2 H3
Mg11.71781.7178
H21.71783.4356
H31.71783.4356

picture of magnesium dihydride state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 Mg1 H3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 0.238      
2 H -0.119      
3 H -0.119      


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 3.893 0.000 0.000
y 0.000 3.893 0.000
z 0.000 0.000 4.767


<r2> (average value of r2) Å2
<r2> 14.998
(<r2>)1/2 3.873