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

using model chemistry: HF/SDD

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

Conformer 2 (C2)

Jump to S1C1 S1C3
Energy calculated at HF/SDD
 hartrees
Energy at 0K-350.576568
Energy at 298.15K 
HF Energy-350.576568
Nuclear repulsion energy83.316369
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/SDD
Rotational Constants (cm-1) from geometry optimized at HF/SDD
See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (D*H)

Jump to S1C1 S1C2
Energy calculated at HF/SDD
 hartrees
Energy at 0K-350.576568
Energy at 298.15K-350.579153
HF Energy-350.576568
Nuclear repulsion energy83.303135
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/SDD
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 4315 3885 0.00      
2 Σg 646 581 0.00      
3 Σu 4315 3885 159.83      
4 Σu 971 874 168.46      
5 Πg 512 461 0.00      
5 Πg 512 461 0.00      
6 Πu 530 477 691.83      
6 Πu 530 477 691.83      
7 Πu 155 140 62.16      
7 Πu 155 140 62.16      

Unscaled Zero Point Vibrational Energy (zpe) 6320.3 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 5690.8 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 HF/SDD
B
0.14906

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

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 1.755
O3 0.000 0.000 -1.755
H4 0.000 0.000 2.693
H5 0.000 0.000 -2.693

Atom - Atom Distances (Å)
  Mg1 O2 O3 H4 H5
Mg11.75451.75452.69272.6927
O21.75453.50910.93824.4472
O31.75453.50914.44720.9382
H42.69270.93824.44725.3854
H52.69274.44720.93825.3854

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/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 1.597      
2 O -1.209      
3 O -1.209      
4 H 0.410      
5 H 0.410      


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 -19.363 0.000 0.000
y 0.000 -19.363 0.000
z 0.000 0.000 -20.896
Traceless
 xyz
x 0.766 0.000 0.000
y 0.000 0.766 0.000
z 0.000 0.000 -1.533
Polar
3z2-r2-3.065
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 1.463 0.000 0.000
y 0.000 1.463 0.000
z 0.000 0.000 3.053


<r2> (average value of r2) Å2
<r2> 76.169
(<r2>)1/2 8.727