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

using model chemistry: B1B95/STO-3G

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 B1B95/STO-3G
Rotational Constants (cm-1) from geometry optimized at B1B95/STO-3G
See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2)

Jump to S1C1 S1C3
Energy calculated at B1B95/STO-3G
 hartrees
Energy at 0K-347.103096
Energy at 298.15K-347.105241
HF Energy-347.103096
Nuclear repulsion energy83.093501
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 B1B95/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3679 3248 95.69      
2 A 917 810 1.28      
3 A 682 602 0.05      
4 A 159 140 9.72      
5 A 141 124 88.56      
6 B 3678 3248 121.91      
7 B 1044 922 78.92      
8 B 914 807 72.01      
9 B 153 135 61.01      

Unscaled Zero Point Vibrational Energy (zpe) 5682.8 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 5017.9 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 B1B95/STO-3G
ABC
8.98910 0.15376 0.15367

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Mg1 0.000 0.000 0.005
O2 0.000 1.772 0.073
O3 0.000 -1.772 0.073
H4 -0.722 2.012 -0.614
H5 0.722 -2.012 -0.614

Atom - Atom Distances (Å)
  Mg1 O2 O3 H4 H5
Mg11.77371.77372.22532.2253
O21.77373.54481.02473.9135
O31.77373.54483.91351.0247
H42.22531.02473.91354.2754
H52.22533.91351.02474.2754

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 102.004 Mg1 O3 H5 102.004
O2 Mg1 O3 175.570
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 0.777      
2 O -0.464      
3 O -0.464      
4 H 0.076      
5 H 0.076      


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 -1.328 1.328
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.710 -2.463 0.000
y -2.463 -28.592 0.000
z 0.000 0.000 -15.010
Traceless
 xyz
x 7.091 -2.463 0.000
y -2.463 -13.732 0.000
z 0.000 0.000 6.641
Polar
3z2-r213.282
x2-y213.882
xy-2.463
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.198 -0.460 0.000
y -0.460 3.291 0.000
z 0.000 0.000 1.120


<r2> (average value of r2) Å2
<r2> 72.381
(<r2>)1/2 8.508

Conformer 3 (D*H)

Jump to S1C1 S1C2
Energy calculated at B1B95/STO-3G
 hartrees
Energy at 0K-347.046719
Energy at 298.15K 
HF Energy-347.046719
Nuclear repulsion energy87.262022
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 B1B95/STO-3G
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 4051 3577 0.00      
2 Σg 805 711 0.00      
3 Σu 4049 3575 30.58      
4 Σu 1217 1075 224.02      
5 Πg 720i 636i 0.00      
5 Πg 720i 636i 0.00      
6 Πu 175 155 30.02      
6 Πu 175 155 30.02      
7 Πu 686i 606i 158.08      
7 Πu 686i 606i 158.08      

Unscaled Zero Point Vibrational Energy (zpe) 3829.7 cm-1
Scaled (by 0.883) Zero Point Vibrational Energy (zpe) 3381.6 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 B1B95/STO-3G
B
0.16648

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/STO-3G

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 1.651
O3 0.000 0.000 -1.651
H4 0.000 0.000 2.637
H5 0.000 0.000 -2.637

Atom - Atom Distances (Å)
  Mg1 O2 O3 H4 H5
Mg11.65151.65152.63662.6366
O21.65153.30290.98524.2881
O31.65153.30294.28810.9852
H42.63660.98524.28815.2733
H52.63664.28810.98525.2733

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 B1B95/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Mg 0.899      
2 O -0.582      
3 O -0.582      
4 H 0.132      
5 H 0.132      


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 -15.439 0.000 0.000
y 0.000 -15.439 0.000
z 0.000 0.000 -18.667
Traceless
 xyz
x 1.614 0.000 0.000
y 0.000 1.614 0.000
z 0.000 0.000 -3.228
Polar
3z2-r2-6.456
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 0.309 0.000 0.000
y 0.000 0.309 0.000
z 0.000 0.000 4.037


<r2> (average value of r2) Å2
<r2> 67.856
(<r2>)1/2 8.237