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All results from a given calculation for CH3SiH3 (methyl silane)

using model chemistry: mPW1PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at mPW1PW91/6-311G*
 hartrees
Energy at 0K-331.215462
Energy at 298.15K-331.210215
Nuclear repulsion energy62.726164
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 mPW1PW91/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3060 2920 6.65      
2 A1 2228 2127 67.79      
3 A1 1323 1262 21.91      
4 A1 944 901 232.90      
5 A1 707 675 9.05      
6 A2 191 182 0.00      
7 E 3141 2998 9.73      
7 E 3141 2998 9.73      
8 E 2227 2126 143.32      
8 E 2227 2126 143.35      
9 E 1488 1421 6.54      
9 E 1488 1421 6.54      
10 E 960 916 42.59      
10 E 960 916 42.58      
11 E 901 860 76.17      
11 E 901 860 76.17      
12 E 524 500 10.58      
12 E 524 500 10.58      

Unscaled Zero Point Vibrational Energy (zpe) 13468.0 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 12853.8 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 mPW1PW91/6-311G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.242
Si2 0.000 0.000 0.634
H3 0.000 -1.018 -1.637
H4 -0.882 0.509 -1.637
H5 0.882 0.509 -1.637
H6 0.000 1.392 1.161
H7 -1.205 -0.696 1.161
H8 1.205 -0.696 1.161

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.87641.09221.09221.09222.77752.77752.7775
Si21.87642.48912.48912.48911.48841.48841.4884
H31.09222.48911.76371.76373.69333.06403.0640
H41.09222.48911.76371.76373.06403.06403.6933
H51.09222.48911.76371.76373.06403.69333.0640
H62.77751.48843.69333.06403.06402.41092.4109
H72.77751.48843.06403.06403.69332.41092.4109
H82.77751.48843.06403.69333.06402.41092.4109

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 110.741 C1 Si2 H7 110.741
C1 Si2 H8 110.741 Si2 C1 H3 111.200
Si2 C1 H4 111.200 Si2 C1 H5 111.200
H3 C1 H4 107.689 H3 C1 H5 107.689
H4 C1 H5 107.689 H6 Si2 H7 108.172
H6 Si2 H8 108.172 H7 Si2 H8 108.172
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.997      
2 Si 0.456      
3 H 0.250      
4 H 0.250      
5 H 0.250      
6 H -0.069      
7 H -0.069      
8 H -0.069      


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 -0.791 0.791
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.996 0.000 0.000
y 0.000 -22.996 0.000
z 0.000 0.000 -23.267
Traceless
 xyz
x 0.136 0.000 0.000
y 0.000 0.136 0.000
z 0.000 0.000 -0.272
Polar
3z2-r2-0.543
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 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 50.318
(<r2>)1/2 7.094