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

using model chemistry: CCD/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes C2 1A
1 3 no D*H 1Σg

Conformer 1 (C2H)

Jump to S1C2 S1C3
Vibrational Frequencies calculated at CCD/6-31+G**
Rotational Constants (cm-1) from geometry optimized at CCD/6-31+G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31+G**
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2)

Jump to S1C1 S1C3
Energy calculated at CCD/6-31+G**
 hartrees
Energy at 0K-350.999873
Energy at 298.15K 
HF Energy-350.577411
Nuclear repulsion energy81.744796
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 CCD/6-31+G**
Rotational Constants (cm-1) from geometry optimized at CCD/6-31+G**
ABC
109.23443 0.14361 0.14355

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31+G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Mg1 0.000 0.000 0.008
O2 0.000 1.791 -0.023
O3 0.000 -1.791 -0.023
H4 0.241 2.697 0.131
H5 -0.241 -2.697 0.131

Atom - Atom Distances (Å)
  Mg1 O2 O3 H4 H5
Mg11.79171.79172.71022.7102
O21.79173.58280.94944.4972
O31.79173.58284.49720.9494
H42.71020.94944.49725.4149
H52.71024.49720.94945.4149

picture of Magnesium dihydroxide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Mg1 O2 H4 161.907 Mg1 O3 H5 161.907
O2 Mg1 O3 178.003
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (D*H)

Jump to S1C1 S1C2
Energy calculated at CCD/6-31+G**
 hartrees
Energy at 0K-350.999830
Energy at 298.15K 
HF Energy-350.577763
Nuclear repulsion energy81.969390
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 CCD/6-31+G**
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 4157 3917 0.00      
2 Σg 603 568 0.00      
3 Σu 4156 3917 208.74      
4 Σu 903 851 223.90      
5 Πg 102i 96i 0.00      
5 Πg 102i 96i 0.00      
6 Πu 165 156 14.88      
6 Πu 165 156 14.88      
7 Πu 42i 40i 377.67      
7 Πu 42i 40i 377.67      

Unscaled Zero Point Vibrational Energy (zpe) 4930.7 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 4646.2 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 CCD/6-31+G**
B
0.14416

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/6-31+G**

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 1.785
O3 0.000 0.000 -1.785
H4 0.000 0.000 2.733
H5 0.000 0.000 -2.733

Atom - Atom Distances (Å)
  Mg1 O2 O3 H4 H5
Mg11.78461.78462.73282.7328
O21.78463.56920.94824.5174
O31.78463.56924.51740.9482
H42.73280.94824.51745.4656
H52.73284.51740.94825.4656

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