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 MgH2 (magnesium dihydride)

using model chemistry: B97D3/6-311G*

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 B97D3/6-311G*
 hartrees
Energy at 0K-201.226648
Energy at 298.15K-201.227851
HF Energy-201.226648
Nuclear repulsion energy 
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 B97D3/6-311G*
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 1548 1548 0.00      
2 Σu 1577 1577 457.12      
3 Πu 449 449 456.16      
3 Πu 449 449 456.16      

Unscaled Zero Point Vibrational Energy (zpe) 2011.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 2011.8 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 B97D3/6-311G*
B
2.81439

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/6-311G*

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 1.724
H3 0.000 0.000 -1.724

Atom - Atom Distances (Å)
  Mg1 H2 H3
Mg11.72381.7238
H21.72383.4477
H31.72383.4477

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 B97D3/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 0.363      
2 H -0.182      
3 H -0.182      


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 -10.692 0.000 0.000
y 0.000 -10.692 0.000
z 0.000 0.000 -23.110
Traceless
 xyz
x 6.209 0.000 0.000
y 0.000 6.209 0.000
z 0.000 0.000 -12.418
Polar
3z2-r2-24.836
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 4.154 0.000 0.000
y 0.000 4.154 0.000
z 0.000 0.000 5.716


<r2> (average value of r2) Å2
<r2> 15.207
(<r2>)1/2 3.900