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All results from a given calculation for MgO (magnesium oxide)

using model chemistry: HF/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ+
Energy calculated at HF/3-21G*
 hartrees
Energy at 0K-272.827820
Energy at 298.15K-272.827972
Nuclear repulsion energy29.396127
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 HF/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 Σ 815 735 188.64      

Unscaled Zero Point Vibrational Energy (zpe) 407.3 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 367.6 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 HF/3-21G*
B
0.58824

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

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Mg1 0.000 0.000 0.691
O2 0.000 0.000 -1.037

Atom - Atom Distances (Å)
  Mg1 O2
Mg11.7282
O21.7282

picture of magnesium oxide state 1 conformation 1
More geometry information
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 0.558 0.867    
2 O -0.558 -0.867    


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 6.852 6.852
CHELPG 0.000 0.000 7.195 7.195
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.240 0.000 0.000
y 0.000 -14.240 0.000
z 0.000 0.000 -14.317
Traceless
 xyz
x 0.038 0.000 0.000
y 0.000 0.038 0.000
z 0.000 0.000 -0.077
Polar
3z2-r2-0.154
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 10.307 0.000 0.000
y 0.000 10.307 0.000
z 0.000 0.000 14.630


<r2> (average value of r2) Å2
<r2> 23.245
(<r2>)1/2 4.821