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

using model chemistry: mPW1PW91/6-311G*

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 mPW1PW91/6-311G*
 hartrees
Energy at 0K-201.233850
Energy at 298.15K-201.235088
HF Energy-201.233850
Nuclear repulsion energy7.578696
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 mPW1PW91/6-311G*
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 1614 1540 0.00      
2 Σu 1642 1567 439.17      
3 Πu 468 447 477.10      
3 Πu 468 447 477.10      

Unscaled Zero Point Vibrational Energy (zpe) 2095.6 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 2000.0 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 mPW1PW91/6-311G*
B
2.85783

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

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 1.711
H3 0.000 0.000 -1.711

Atom - Atom Distances (Å)
  Mg1 H2 H3
Mg11.71071.7107
H21.71073.4214
H31.71073.4214

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

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 0.350      
2 H -0.175      
3 H -0.175      


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 -10.545 0.000 0.000
y 0.000 -10.545 0.000
z 0.000 0.000 -22.785
Traceless
 xyz
x 6.120 0.000 0.000
y 0.000 6.120 0.000
z 0.000 0.000 -12.240
Polar
3z2-r2-24.481
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 3.822 0.000 0.000
y 0.000 3.822 0.000
z 0.000 0.000 5.402


<r2> (average value of r2) Å2
<r2> 14.987
(<r2>)1/2 3.871