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All results from a given calculation for Mg(OH)2 (Magnesium dihydroxide)

using model chemistry: HF/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 3 yes D*H 1Σg

Conformer 1 (C2H)

Jump to S1C2 S1C3
Vibrational Frequencies calculated at HF/CEP-31G
Rotational Constants (cm-1) from geometry optimized at HF/CEP-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2)

Jump to S1C1 S1C3
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-33.379313
Energy at 298.15K 
HF Energy-33.379313
Nuclear repulsion energy21.569233
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/CEP-31G
Rotational Constants (cm-1) from geometry optimized at HF/CEP-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (D*H)

Jump to S1C1 S1C2
Energy calculated at HF/CEP-31G
 hartrees
Energy at 0K-33.379316
Energy at 298.15K-33.381718
HF Energy-33.379316
Nuclear repulsion energy21.570074
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/CEP-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 4335 3908 0.00      
2 Σg 587 529 0.00      
3 Σu 4334 3907 156.40      
4 Σu 934 842 148.16      
5 Πg 471 424 0.00      
5 Πg 471 424 0.00      
6 Πu 504 454 624.74      
6 Πu 504 454 624.74      
7 Πu 142 128 71.67      
7 Πu 142 128 71.67      

Unscaled Zero Point Vibrational Energy (zpe) 6211.8 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 5599.3 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/CEP-31G
B
0.14615

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Mg1 0.000 0.000 0.000
O2 0.000 0.000 1.772
O3 0.000 0.000 -1.772
H4 0.000 0.000 2.715
H5 0.000 0.000 -2.715

Atom - Atom Distances (Å)
  Mg1 O2 O3 H4 H5
Mg11.77241.77242.71482.7148
O21.77243.54470.94254.4872
O31.77243.54474.48720.9425
H42.71480.94254.48725.4297
H52.71484.48720.94255.4297

picture of Magnesium dihydroxide state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Mg1 O2 H4 180.000 Mg1 O3 H5 180.000
O2 Mg1 O3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 1.480      
2 O -1.115      
3 O -1.115      
4 H 0.374      
5 H 0.374      


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 -17.677 0.000 0.000
y 0.000 -17.677 0.000
z 0.000 0.000 -19.910
Traceless
 xyz
x 1.117 0.000 0.000
y 0.000 1.117 0.000
z 0.000 0.000 -2.233
Polar
3z2-r2-4.466
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 1.568 0.000 0.000
y 0.000 1.568 0.000
z 0.000 0.000 3.406


<r2> (average value of r2) Å2
<r2> 63.942
(<r2>)1/2 7.996