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All results from a given calculation for SiH3OH (silanol)

using model chemistry: HF/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/3-21G*
 hartrees
Energy at 0K-364.293375
Energy at 298.15K 
HF Energy-364.293375
Nuclear repulsion energy65.068877
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/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 A' 3992 3603 105.43 101.68 0.33 0.49
2 A' 2438 2200 135.58 111.08 0.14 0.24
3 A' 2390 2158 175.28 104.89 0.15 0.27
4 A' 1157 1044 370.71 15.15 0.68 0.81
5 A' 1061 958 174.21 23.49 0.75 0.86
6 A' 1007 909 5.26 9.65 0.58 0.74
7 A' 845 763 160.78 7.91 0.51 0.67
8 A' 690 623 246.84 5.70 0.61 0.76
9 A" 2371 2140 270.42 50.37 0.75 0.86
10 A" 1033 933 159.77 24.79 0.75 0.86
11 A" 823 743 139.98 9.08 0.75 0.86
12 A" 229 207 184.16 3.91 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9018.1 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 8139.7 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/3-21G*
ABC
2.69122 0.46286 0.45579

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.027 -0.529 0.000
O2 0.027 1.104 0.000
H3 1.429 -0.965 0.000
H4 -0.652 -1.086 1.189
H5 -0.652 -1.086 -1.189
H6 -0.719 1.707 0.000

Atom - Atom Distances (Å)
  Si1 O2 H3 H4 H5 H6
Si11.63291.46801.47791.47792.3564
O21.63292.49932.58242.58240.9586
H31.46802.49932.39902.39903.4277
H41.47792.58242.39902.37793.0354
H51.47792.58242.39902.37793.0354
H62.35640.95863.42773.03543.0354

picture of silanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 O2 H6 128.934 O2 Si1 H3 107.298
O2 Si1 H4 112.134 O2 Si1 H5 112.134
H3 Si1 H4 109.047 H3 Si1 H5 109.047
H4 Si1 H5 107.126
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.887      
2 O -0.772      
3 H -0.162      
4 H -0.184      
5 H -0.184      
6 H 0.414      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.613 0.525 0.000 1.696
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.382 -3.373 0.000
y -3.373 -19.413 0.000
z 0.000 0.000 -21.848
Traceless
 xyz
x 0.248 -3.373 0.000
y -3.373 1.703 0.000
z 0.000 0.000 -1.950
Polar
3z2-r2-3.900
x2-y2-0.970
xy-3.373
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.034 -0.219 0.000
y -0.219 3.029 0.000
z 0.000 0.000 2.766


<r2> (average value of r2) Å2
<r2> 38.951
(<r2>)1/2 6.241