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All results from a given calculation for SiH3OH (silanol)

using model chemistry: mPW1PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/3-21G
 hartrees
Energy at 0K-365.151611
Energy at 298.15K 
HF Energy-365.151611
Nuclear repulsion energy63.129798
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 mPW1PW91/3-21G
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' 3673 3506 38.02 126.61 0.30 0.47
2 A' 2256 2154 118.93 106.67 0.24 0.39
3 A' 2187 2088 129.74 163.11 0.09 0.16
4 A' 1050 1002 181.24 17.84 0.67 0.80
5 A' 956 912 98.94 14.93 0.72 0.84
6 A' 928 886 61.22 40.73 0.75 0.86
7 A' 793 757 153.14 8.83 0.11 0.20
8 A' 726 693 100.37 7.18 0.74 0.85
9 A" 2178 2079 220.96 68.09 0.75 0.86
10 A" 898 857 79.36 39.29 0.75 0.86
11 A" 733 700 98.26 14.09 0.75 0.86
12 A" 278 265 156.53 3.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8327.9 cm-1
Scaled (by 0.9546) Zero Point Vibrational Energy (zpe) 7949.8 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 mPW1PW91/3-21G
ABC
2.56389 0.43377 0.42622

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.029 -0.546 0.000
O2 0.029 1.154 0.000
H3 1.463 -0.945 0.000
H4 -0.636 -1.143 1.208
H5 -0.636 -1.143 -1.208
H6 -0.820 1.649 0.000

Atom - Atom Distances (Å)
  Si1 O2 H3 H4 H5 H6
Si11.70031.48861.50301.50302.3539
O21.70032.54242.67952.67950.9824
H31.48862.54242.43022.43023.4558
H41.50302.67952.43022.41683.0485
H51.50302.67952.43022.41683.0485
H62.35390.98243.45583.04853.0485

picture of silanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 O2 H6 120.290 O2 Si1 H3 105.550
O2 Si1 H4 113.402 O2 Si1 H5 113.402
H3 Si1 H4 108.652 H3 Si1 H5 108.652
H4 Si1 H5 107.031
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.788      
2 O -0.714      
3 H -0.133      
4 H -0.162      
5 H -0.162      
6 H 0.382      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.704 0.038 0.000 1.705
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.312 -3.466 0.000
y -3.466 -20.593 0.000
z 0.000 0.000 -22.188
Traceless
 xyz
x 1.079 -3.466 0.000
y -3.466 0.657 0.000
z 0.000 0.000 -1.736
Polar
3z2-r2-3.471
x2-y20.281
xy-3.466
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.485 -0.187 0.000
y -0.187 3.700 0.000
z 0.000 0.000 3.162


<r2> (average value of r2) Å2
<r2> 40.755
(<r2>)1/2 6.384