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

using model chemistry: B3LYP/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 B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-331.223539
Energy at 298.15K-331.218314
Nuclear repulsion energy62.665459
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 B3LYP/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 A1 3042 2935 3.97      
2 A1 2214 2136 62.42      
3 A1 1295 1250 7.23      
4 A1 950 916 202.49      
5 A1 691 666 9.97      
6 A2 199 192 0.00      
7 E 3121 3012 7.87      
7 E 3121 3012 7.87      
8 E 2215 2137 134.87      
8 E 2215 2137 134.88      
9 E 1465 1414 1.56      
9 E 1465 1414 1.56      
10 E 962 928 39.59      
10 E 962 928 39.59      
11 E 889 858 59.75      
11 E 889 858 59.74      
12 E 520 501 6.78      
12 E 520 501 6.78      

Unscaled Zero Point Vibrational Energy (zpe) 13366.4 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 12898.5 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 B3LYP/6-31G(2df,p)
See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.246
Si2 0.000 0.000 0.635
H3 0.000 -1.022 -1.636
H4 -0.885 0.511 -1.636
H5 0.885 0.511 -1.636
H6 0.000 1.390 1.162
H7 -1.204 -0.695 1.162
H8 1.204 -0.695 1.162

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88091.09411.09411.09412.77992.77992.7799
Si21.88092.49082.49082.49081.48621.48621.4862
H31.09412.49081.77011.77013.69403.06353.0635
H41.09412.49081.77011.77013.06353.06353.6940
H51.09412.49081.77011.77013.06353.69403.0635
H62.77991.48623.69403.06353.06352.40722.4072
H72.77991.48623.06353.06353.69402.40722.4072
H82.77991.48623.06353.69403.06352.40722.4072

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 110.752 C1 Si2 H7 110.752
C1 Si2 H8 110.752 Si2 C1 H3 110.916
Si2 C1 H4 110.916 Si2 C1 H5 110.916
H3 C1 H4 107.989 H3 C1 H5 107.989
H4 C1 H5 107.989 H6 Si2 H7 108.161
H6 Si2 H8 108.161 H7 Si2 H8 108.161
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.450      
2 Si 0.035      
3 H 0.135      
4 H 0.135      
5 H 0.135      
6 H 0.003      
7 H 0.003      
8 H 0.003      


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 -0.842 0.842
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.708 0.000 0.000
y 0.000 -22.708 0.000
z 0.000 0.000 -22.767
Traceless
 xyz
x 0.029 0.000 0.000
y 0.000 0.029 0.000
z 0.000 0.000 -0.058
Polar
3z2-r2-0.117
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 5.017 0.000 0.000
y 0.000 5.017 0.000
z 0.000 0.000 5.860


<r2> (average value of r2) Å2
<r2> 50.164
(<r2>)1/2 7.083