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

using model chemistry: B3LYP/3-21G

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/3-21G
 hartrees
Energy at 0K-329.463726
Energy at 298.15K-329.458492
Nuclear repulsion energy61.859520
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/3-21G
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 3056 2949 6.44      
2 A1 2179 2103 63.73      
3 A1 1370 1322 14.30      
4 A1 916 884 214.37      
5 A1 684 660 4.29      
6 A2 177 171 0.00      
7 E 3133 3023 8.24      
7 E 3133 3023 8.24      
8 E 2186 2109 149.62      
8 E 2186 2109 149.63      
9 E 1537 1483 6.36      
9 E 1537 1483 6.36      
10 E 955 922 5.46      
10 E 955 922 5.46      
11 E 931 899 102.35      
11 E 931 899 102.35      
12 E 529 511 13.19      
12 E 529 511 13.19      

Unscaled Zero Point Vibrational Energy (zpe) 13463.4 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 12990.8 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 B3LYP/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.272
Si2 0.000 0.000 0.647
H3 0.000 -1.026 -1.656
H4 -0.888 0.513 -1.656
H5 0.888 0.513 -1.656
H6 0.000 1.402 1.180
H7 -1.214 -0.701 1.180
H8 1.214 -0.701 1.180

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.91951.09491.09491.09492.82512.82512.8251
Si21.91952.52082.52082.52081.49991.49991.4999
H31.09492.52081.77661.77663.73303.10193.1019
H41.09492.52081.77661.77663.10193.10193.7330
H51.09492.52081.77661.77663.10193.73303.1019
H62.82511.49993.73303.10193.10192.42822.4282
H72.82511.49993.10193.10193.73302.42822.4282
H82.82511.49993.10193.73303.10192.42822.4282

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 110.824 C1 Si2 H7 110.824
C1 Si2 H8 110.824 Si2 C1 H3 110.482
Si2 C1 H4 110.482 Si2 C1 H5 110.482
H3 C1 H4 108.442 H3 C1 H5 108.442
H4 C1 H5 108.442 H6 Si2 H7 108.086
H6 Si2 H8 108.086 H7 Si2 H8 108.086
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.916     -0.631
2 Si 0.633     0.809
3 H 0.212     0.147
4 H 0.212     0.148
5 H 0.212     0.148
6 H -0.118     -0.208
7 H -0.118     -0.207
8 H -0.118     -0.207


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 -0.713 0.713
CHELPG        
AIM        
ESP 0.002 -0.002 -0.673 0.673


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.390 0.000 0.000
y 0.000 -23.390 0.000
z 0.000 0.000 -23.434
Traceless
 xyz
x 0.022 0.000 0.000
y 0.000 0.022 0.000
z 0.000 0.000 -0.044
Polar
3z2-r2-0.088
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 4.546 0.000 0.000
y 0.000 4.546 0.000
z 0.000 0.000 5.221


<r2> (average value of r2) Å2
<r2> 51.649
(<r2>)1/2 7.187