return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for SiH3OH (silanol)

using model chemistry: PBEPBE/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 PBEPBE/3-21G
 hartrees
Energy at 0K-364.917178
Energy at 298.15K 
HF Energy-364.917178
Nuclear repulsion energy62.391919
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 PBEPBE/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' 3457 3426 17.87 132.45 0.30 0.47
2 A' 2187 2168 107.06 102.37 0.27 0.43
3 A' 2105 2086 120.14 168.46 0.08 0.15
4 A' 1015 1005 111.49 14.27 0.64 0.78
5 A' 944 935 133.85 19.27 0.74 0.85
6 A' 888 880 53.80 38.15 0.75 0.86
7 A' 773 766 105.95 7.92 0.08 0.14
8 A' 706 699 77.40 7.22 0.66 0.80
9 A" 2100 2081 205.36 71.68 0.75 0.86
10 A" 855 847 57.54 36.96 0.75 0.86
11 A" 703 697 73.67 14.57 0.75 0.86
12 A" 303 300 135.39 4.31 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 8018.0 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 7945.1 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 PBEPBE/3-21G
ABC
2.49871 0.42423 0.41639

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Si1 0.029 -0.552 0.000
O2 0.029 1.171 0.000
H3 1.482 -0.931 0.000
H4 -0.630 -1.170 1.220
H5 -0.630 -1.170 -1.220
H6 -0.864 1.622 0.000

Atom - Atom Distances (Å)
  Si1 O2 H3 H4 H5 H6
Si11.72311.50171.51811.51812.3498
O21.72312.55542.72142.72141.0000
H31.50172.55542.45062.45063.4669
H41.51812.72142.45062.43963.0560
H51.51812.72142.45062.43963.0560
H62.34981.00003.46693.05603.0560

picture of silanol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Si1 O2 H6 116.774 O2 Si1 H3 104.619
O2 Si1 H4 114.050 O2 Si1 H5 114.050
H3 Si1 H4 108.485 H3 Si1 H5 108.485
H4 Si1 H5 106.929
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 Si 0.622      
2 O -0.629      
3 H -0.099      
4 H -0.128      
5 H -0.128      
6 H 0.362      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.670 0.125 0.000 1.675
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.319 -3.350 0.000
y -3.350 -20.793 0.000
z 0.000 0.000 -22.326
Traceless
 xyz
x 1.241 -3.350 0.000
y -3.350 0.529 0.000
z 0.000 0.000 -1.770
Polar
3z2-r2-3.540
x2-y20.474
xy-3.350
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.669 -0.187 0.000
y -0.187 4.022 0.000
z 0.000 0.000 3.315


<r2> (average value of r2) Å2
<r2> 41.412
(<r2>)1/2 6.435