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 CH3SiH3 (methyl silane)

using model chemistry: PBEPBE/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at PBEPBE/6-31+G**
 hartrees
Energy at 0K-330.970309
Energy at 298.15K-330.965052
Nuclear repulsion energy62.179236
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/6-31+G**
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 2989 2955 7.28      
2 A 2167 2142 71.45      
3 A 1254 1239 16.54      
4 A 902 891 197.45      
5 A 678 670 9.67      
6 A 187 185 0.00      
7 E 3079 3044 6.53      
7 E 3079 3044 6.53      
8 E 2175 2150 154.24      
8 E 2175 2150 154.27      
9 E 1423 1406 6.36      
9 E 1423 1406 6.36      
10 E 924 913 28.47      
10 E 924 913 28.47      
11 E 864 854 64.59      
11 E 864 854 64.59      
12 E 502 496 7.98      
12 E 502 496 7.98      

Unscaled Zero Point Vibrational Energy (zpe) 13054.2 cm-1
Scaled (by 0.9886) Zero Point Vibrational Energy (zpe) 12905.4 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/6-31+G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31+G**

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.254
Si2 0.000 0.000 0.640
H3 -1.030 -0.000 -1.647
H4 0.515 0.892 -1.647
H5 0.515 -0.892 -1.647
H6 1.403 -0.000 1.171
H7 -0.702 1.216 1.171
H8 -0.702 -1.215 1.171

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.89401.10221.10221.10222.80252.80252.8025
Si21.89402.50792.50792.50791.50091.50091.5009
H31.10222.50791.78371.78373.72363.08713.0867
H41.10222.50791.78371.78373.08713.08673.7236
H51.10222.50791.78371.78373.08673.72363.0871
H62.80251.50093.72363.08713.08672.43092.4309
H72.80251.50093.08713.08673.72362.43092.4309
H82.80251.50093.08673.72363.08712.43092.4309

picture of methyl silane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 Si2 H6 110.753 C1 Si2 H7 110.753
C1 Si2 H8 110.753 Si2 C1 H3 110.875
Si2 C1 H4 110.875 Si2 C1 H5 110.875
H3 C1 H4 108.031 H3 C1 H5 108.031
H4 C1 H5 108.031 H6 Si2 H7 108.160
H6 Si2 H8 108.160 H7 Si2 H8 108.160
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.752      
2 Si 0.390      
3 H 0.192      
4 H 0.192      
5 H 0.192      
6 H -0.072      
7 H -0.072      
8 H -0.072      


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 -0.806 0.806
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.206 0.000 0.000
y 0.000 -23.206 0.000
z 0.000 0.000 -23.515
Traceless
 xyz
x 0.154 0.000 0.000
y 0.000 0.154 0.000
z 0.000 0.000 -0.308
Polar
3z2-r2-0.616
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 5.497 0.000 0.000
y 0.000 5.497 0.000
z 0.000 0.000 6.593


<r2> (average value of r2) Å2
<r2> 51.073
(<r2>)1/2 7.147