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: mPW1PW91/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-331.199618
Energy at 298.15K-331.194367
Nuclear repulsion energy62.785086
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 mPW1PW91/6-31G(2df,p)
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 3070 2930 2.79      
2 A 2225 2125 62.24      
3 A 1290 1232 10.76      
4 A 942 899 195.95      
5 A 704 672 9.62      
6 A 201 192 0.00      
7 E 3162 3018 5.00      
7 E 3162 3018 5.00      
8 E 2227 2126 132.69      
8 E 2227 2126 132.71      
9 E 1464 1398 2.20      
9 E 1464 1398 2.20      
10 E 957 913 35.29      
10 E 957 913 35.29      
11 E 887 847 64.44      
11 E 887 847 64.44      
12 E 517 494 6.25      
12 E 517 494 6.25      

Unscaled Zero Point Vibrational Energy (zpe) 13430.0 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 12821.6 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 mPW1PW91/6-31G(2df,p)
See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.242
Si2 0.000 0.000 0.633
H3 -1.021 -0.000 -1.630
H4 0.511 0.884 -1.630
H5 0.511 -0.884 -1.630
H6 1.391 -0.000 1.160
H7 -0.695 1.205 1.160
H8 -0.695 -1.204 1.160

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.87461.09251.09251.09252.77532.77532.7753
Si21.87462.48252.48252.48251.48731.48731.4873
H31.09252.48251.76881.76883.68803.05623.0561
H41.09252.48251.76881.76883.05623.05613.6880
H51.09252.48251.76881.76883.05613.68803.0562
H62.77531.48733.68803.05623.05612.40902.4090
H72.77531.48733.05623.05613.68802.40902.4090
H82.77531.48733.05613.68803.05622.40902.4090

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 110.756 C1 Si2 H7 110.756
C1 Si2 H8 110.756 Si2 C1 H3 110.813
Si2 C1 H4 110.813 Si2 C1 H5 110.813
H3 C1 H4 108.097 H3 C1 H5 108.097
H4 C1 H5 108.097 H6 Si2 H7 108.157
H6 Si2 H8 108.157 H7 Si2 H8 108.157
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.546      
2 Si 0.025      
3 H 0.163      
4 H 0.163      
5 H 0.163      
6 H 0.011      
7 H 0.011      
8 H 0.011      


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 -0.871 0.871
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.526 0.000 0.000
y 0.000 -22.526 0.000
z 0.000 0.000 -22.591
Traceless
 xyz
x 0.032 0.000 0.000
y 0.000 0.032 0.000
z 0.000 0.000 -0.065
Polar
3z2-r2-0.129
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 5.029 0.000 0.000
y 0.000 5.028 0.000
z 0.000 0.000 5.837


<r2> (average value of r2) Å2
<r2> 49.879
(<r2>)1/2 7.063