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All results from a given calculation for SiH3OH (silanol)

using model chemistry: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-365.105573
Energy at 298.15K 
HF Energy-365.105573
Nuclear repulsion energy63.006898
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 B3PW91/3-21G
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' 3638 3497 32.86      
2 A' 2243 2156 119.61      
3 A' 2170 2086 131.00      
4 A' 1045 1005 175.09      
5 A' 952 915 102.06      
6 A' 923 887 61.07      
7 A' 788 757 145.12      
8 A' 723 695 99.32      
9 A" 2162 2078 222.59      
10 A" 893 858 77.33      
11 A" 729 701 94.71      
12 A" 280 269 153.86      

Unscaled Zero Point Vibrational Energy (zpe) 8273.2 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 7952.2 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 B3PW91/3-21G
ABC
2.55378 0.43212 0.42453

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.029 -0.547 0.000
O2 0.029 1.157 0.000
H3 1.465 -0.945 0.000
H4 -0.636 -1.147 1.210
H5 -0.636 -1.147 -1.210
H6 -0.826 1.647 0.000

Atom - Atom Distances (Å)
  Si1 O2 H3 H4 H5 H6
Si11.70401.49071.50561.50562.3543
O21.70402.54562.68622.68620.9848
H31.49072.54562.43362.43363.4589
H41.50562.68622.43362.42043.0506
H51.50562.68622.43362.42043.0506
H62.35430.98483.45893.05063.0506

picture of silanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 O2 H6 119.824 O2 Si1 H3 105.463
O2 Si1 H4 113.490 O2 Si1 H5 113.490
H3 Si1 H4 108.624 H3 Si1 H5 108.624
H4 Si1 H5 106.991
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.774      
2 O -0.701      
3 H -0.132      
4 H -0.160      
5 H -0.160      
6 H 0.379      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.702 0.063 0.000 1.703
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.308 -3.458 0.000
y -3.458 -20.618 0.000
z 0.000 0.000 -22.202
Traceless
 xyz
x 1.102 -3.458 0.000
y -3.458 0.637 0.000
z 0.000 0.000 -1.739
Polar
3z2-r2-3.478
x2-y20.310
xy-3.458
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.510 -0.188 0.000
y -0.188 3.746 0.000
z 0.000 0.000 3.180


<r2> (average value of r2) Å2
<r2> 40.862
(<r2>)1/2 6.392