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

using model chemistry: CCD/3-21G

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 CCD/3-21G
Rotational Constants (cm-1) from geometry optimized at CCD/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2)

Jump to S1C1 S1C3
Energy calculated at CCD/3-21G
 hartrees
Energy at 0K-348.850402
Energy at 298.15K 
HF Energy-348.597865
Nuclear repulsion energy84.673466
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/3-21G
Rotational Constants (cm-1) from geometry optimized at CCD/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (D*H)

Jump to S1C1 S1C2
Energy calculated at CCD/3-21G
 hartrees
Energy at 0K-348.850818
Energy at 298.15K-348.852235
HF Energy-348.598218
Nuclear repulsion energy84.277284
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/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 Σg 3873 3765 0.00      
2 Σg 684 665 0.00      
3 Σu 3873 3766 50.75      
4 Σu 1041 1013 117.44      
5 Πg 262 254 0.00      
5 Πg 262 254 0.00      
6 Πu 256 249 431.10      
6 Πu 256 249 431.10      
7 Πu 106 103 47.17      
7 Πu 106 103 47.17      

Unscaled Zero Point Vibrational Energy (zpe) 5359.4 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 5210.9 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/3-21G
B
0.15373

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

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 1.724
O3 0.000 0.000 -1.724
H4 0.000 0.000 2.688
H5 0.000 0.000 -2.688

Atom - Atom Distances (Å)
  Mg1 O2 O3 H4 H5
Mg11.72411.72412.68802.6880
O21.72413.44830.96394.4121
O31.72413.44834.41210.9639
H42.68800.96394.41215.3760
H52.68804.41210.96395.3760

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