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

using model chemistry: wB97X-D/3-21G

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 wB97X-D/3-21G
 hartrees
Energy at 0K-200.070946
Energy at 298.15K-200.072250
HF Energy-200.070946
Nuclear repulsion energy7.463440
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 wB97X-D/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 Σg 1635 1635 0.00      
2 Σu 1675 1675 348.20      
3 Πu 509 509 434.89      
3 Πu 509 509 434.89      

Unscaled Zero Point Vibrational Energy (zpe) 2163.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 2163.2 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 wB97X-D/3-21G
B
2.77166

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G

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 1.737
H3 0.000 0.000 -1.737

Atom - Atom Distances (Å)
  Mg1 H2 H3
Mg11.73711.7371
H21.73713.4742
H31.73713.4742

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 wB97X-D/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 0.404      
2 H -0.202      
3 H -0.202      


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
Primitive
 xyz
x -10.893 0.000 0.000
y 0.000 -10.893 0.000
z 0.000 0.000 -23.914
Traceless
 xyz
x 6.511 0.000 0.000
y 0.000 6.511 0.000
z 0.000 0.000 -13.021
Polar
3z2-r2-26.042
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 3.353 0.000 0.000
y 0.000 3.353 0.000
z 0.000 0.000 4.488


<r2> (average value of r2) Å2
<r2> 15.549
(<r2>)1/2 3.943