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

using model chemistry: B97D3/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at B97D3/3-21G
 hartrees
Energy at 0K-329.419164
Energy at 298.15K-329.425012
HF Energy-329.419164
Nuclear repulsion energy 
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 B97D3/3-21G
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 2998 2947 8.67      
2 A1 2141 2105 68.44      
3 A1 1336 1313 11.18      
4 A1 894 878 200.08      
5 A1 666 654 3.84      
6 A2 171 168 0.00      
7 E 3081 3029 11.37      
7 E 3081 3029 11.37      
8 E 2154 2117 157.28      
8 E 2154 2117 157.27      
9 E 1509 1483 5.73      
9 E 1509 1483 5.73      
10 E 932 917 1.45      
10 E 932 917 1.45      
11 E 910 895 98.98      
11 E 910 895 98.97      
12 E 518 510 11.34      
12 E 518 510 11.33      

Unscaled Zero Point Vibrational Energy (zpe) 13206.4 cm-1
Scaled (by 0.983) Zero Point Vibrational Energy (zpe) 12981.8 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 B97D3/3-21G
ABC
1.82579 0.34643 0.34643

See section I.F.4 to change rotational constant units
Geometric Data calculated at B97D3/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.279
Si2 0.000 0.000 0.651
H3 0.000 -1.031 -1.663
H4 -0.893 0.515 -1.663
H5 0.893 0.515 -1.663
H6 0.000 1.411 1.186
H7 -1.222 -0.705 1.186
H8 1.222 -0.705 1.186

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.92991.09991.09991.09992.84032.84032.8403
Si21.92992.53252.53252.53251.50911.50911.5091
H31.09992.53251.78571.78573.75183.11643.1164
H41.09992.53251.78571.78573.11643.11643.7518
H51.09992.53251.78571.78573.11643.75183.1164
H62.84031.50913.75183.11643.11642.44392.4439
H72.84031.50913.11643.11643.75182.44392.4439
H82.84031.50913.11643.75183.11642.44392.4439

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 110.770 C1 Si2 H7 110.770
C1 Si2 H8 110.770 Si2 C1 H3 110.393
Si2 C1 H4 110.393 Si2 C1 H5 110.393
H3 C1 H4 108.533 H3 C1 H5 108.533
H4 C1 H5 108.533 H6 Si2 H7 108.142
H6 Si2 H8 108.142 H7 Si2 H8 108.142
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B97D3/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.928      
2 Si 0.604      
3 H 0.219      
4 H 0.219      
5 H 0.219      
6 H -0.111      
7 H -0.111      
8 H -0.111      


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 -0.737 0.737
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.333 0.000 0.000
y 0.000 -23.333 0.000
z 0.000 0.000 -23.347
Traceless
 xyz
x 0.007 0.000 0.000
y 0.000 0.007 0.000
z 0.000 0.000 -0.014
Polar
3z2-r2-0.027
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 4.650 0.000 0.000
y 0.000 4.650 0.000
z 0.000 0.000 5.394


<r2> (average value of r2) Å2
<r2> 51.993
(<r2>)1/2 7.211