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

using model chemistry: PBEPBE/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 PBEPBE/6-311G**
 hartrees
Energy at 0K-331.000735
Energy at 298.15K-330.995494
Nuclear repulsion energy62.282506
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/6-311G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 2980 2953 5.02      
2 A1 2158 2138 61.45      
3 A1 1249 1238 13.94      
4 A1 902 894 197.33      
5 A1 681 674 9.87      
6 A2 192 190 0.00      
7 E 3062 3035 7.19      
7 E 3062 3035 7.20      
8 E 2165 2145 125.22      
8 E 2165 2145 125.25      
9 E 1418 1405 4.96      
9 E 1418 1405 4.96      
10 E 923 915 29.38      
10 E 923 915 29.38      
11 E 863 855 68.02      
11 E 863 855 68.02      
12 E 504 500 8.28      
12 E 504 500 8.28      

Unscaled Zero Point Vibrational Energy (zpe) 13015.3 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 12896.8 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 PBEPBE/6-311G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.252
Si2 0.000 0.000 0.638
H3 0.000 -1.028 -1.644
H4 -0.890 0.514 -1.644
H5 0.890 0.514 -1.644
H6 0.000 1.403 1.169
H7 -1.215 -0.702 1.169
H8 1.215 -0.702 1.169

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88961.10021.10021.10022.79802.79802.7980
Si21.88962.50252.50252.50251.50041.50041.5004
H31.10022.50251.78051.78053.71793.08143.0814
H41.10022.50251.78051.78053.08143.08143.7179
H51.10022.50251.78051.78053.08143.71793.0814
H62.79801.50043.71793.08143.08142.43052.4305
H72.79801.50043.08143.08143.71792.43052.4305
H82.79801.50043.08143.71793.08142.43052.4305

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 110.733 C1 Si2 H7 110.733
C1 Si2 H8 110.733 Si2 C1 H3 110.877
Si2 C1 H4 110.877 Si2 C1 H5 110.877
H3 C1 H4 108.030 H3 C1 H5 108.030
H4 C1 H5 108.030 H6 Si2 H7 108.181
H6 Si2 H8 108.181 H7 Si2 H8 108.181
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.647      
2 Si 0.477      
3 H 0.152      
4 H 0.152      
5 H 0.152      
6 H -0.096      
7 H -0.096      
8 H -0.096      


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 -0.802 0.802
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.170 0.000 0.000
y 0.000 -23.170 0.000
z 0.000 0.000 -23.366
Traceless
 xyz
x 0.098 0.000 0.000
y 0.000 0.098 0.000
z 0.000 0.000 -0.196
Polar
3z2-r2-0.392
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 5.615 0.000 0.000
y 0.000 5.615 0.000
z 0.000 0.000 6.335


<r2> (average value of r2) Å2
<r2> 50.892
(<r2>)1/2 7.134