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

using model chemistry: BLYP/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at BLYP/6-31G**
 hartrees
Energy at 0K-331.146760
Energy at 298.15K-331.141545
Nuclear repulsion energy62.103988
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 BLYP/6-31G**
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 2978 2955 6.34      
2 A1 2164 2147 69.06      
3 A1 1280 1270 7.23      
4 A1 926 918 201.06      
5 A1 665 659 8.63      
6 A2 192 191 0.00      
7 E 3055 3031 11.51      
7 E 3055 3031 11.51      
8 E 2170 2153 159.51      
8 E 2170 2153 159.53      
9 E 1446 1435 2.05      
9 E 1446 1435 2.05      
10 E 938 930 36.48      
10 E 938 930 36.48      
11 E 878 871 63.61      
11 E 878 871 63.61      
12 E 511 507 7.16      
12 E 511 507 7.16      

Unscaled Zero Point Vibrational Energy (zpe) 13099.0 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 12998.1 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 BLYP/6-31G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-31G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.259
Si2 0.000 0.000 0.642
H3 0.000 -1.028 -1.653
H4 -0.891 0.514 -1.653
H5 0.891 0.514 -1.653
H6 0.000 1.399 1.176
H7 -1.211 -0.699 1.176
H8 1.211 -0.699 1.176

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.90111.10121.10121.10122.80812.80812.8081
Si21.90112.51492.51492.51491.49721.49721.4972
H31.10122.51491.78111.78113.72743.09483.0948
H41.10122.51491.78111.78113.09483.09483.7274
H51.10122.51491.78111.78113.09483.72743.0948
H62.80811.49723.72743.09483.09482.42282.4228
H72.80811.49723.09483.09483.72742.42282.4228
H82.80811.49723.09483.72743.09482.42282.4228

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 110.886 C1 Si2 H7 110.886
C1 Si2 H8 110.886 Si2 C1 H3 110.963
Si2 C1 H4 110.963 Si2 C1 H5 110.963
H3 C1 H4 107.939 H3 C1 H5 107.939
H4 C1 H5 107.939 H6 Si2 H7 108.020
H6 Si2 H8 108.020 H7 Si2 H8 108.020
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.475      
2 Si 0.366      
3 H 0.118      
4 H 0.118      
5 H 0.118      
6 H -0.081      
7 H -0.081      
8 H -0.081      


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 -0.834 0.834
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.830 0.000 0.000
y 0.000 -22.830 0.000
z 0.000 0.000 -22.834
Traceless
 xyz
x 0.002 0.000 0.000
y 0.000 0.002 0.000
z 0.000 0.000 -0.004
Polar
3z2-r2-0.008
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> 50.930
(<r2>)1/2 7.137