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

using model chemistry: B3LYP/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-331.261990
Energy at 298.15K-331.267921
Nuclear repulsion energy62.661474
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/cc-pVTZ
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 3032 2930 5.30      
2 A1 2213 2139 65.40      
3 A1 1299 1255 10.65      
4 A1 945 913 212.92      
5 A1 691 667 11.62      
6 A2 197 191 0.00      
7 E 3103 2999 8.92      
7 E 3103 2999 8.92      
8 E 2214 2140 139.57      
8 E 2214 2140 139.58      
9 E 1467 1418 2.37      
9 E 1467 1418 2.37      
10 E 961 929 41.35      
10 E 961 929 41.36      
11 E 891 861 59.50      
11 E 891 861 59.50      
12 E 524 507 9.95      
12 E 524 507 9.94      

Unscaled Zero Point Vibrational Energy (zpe) 13347.3 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 12901.5 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/cc-pVTZ
ABC
1.87706 0.36160 0.36160

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.247
Si2 0.000 0.000 0.636
H3 0.000 -1.019 -1.637
H4 -0.882 0.509 -1.637
H5 0.882 0.509 -1.637
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
C11.88351.09081.09081.09082.78122.78122.7812
Si21.88352.49092.49092.49091.48611.48611.4861
H31.09082.49091.76481.76483.69253.06363.0636
H41.09082.49091.76481.76483.06363.06363.6925
H51.09082.49091.76481.76483.06363.69253.0636
H62.78121.48613.69253.06363.06362.40762.4076
H72.78121.48613.06363.06363.69252.40762.4076
H82.78121.48613.06363.69253.06362.40762.4076

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 110.708 C1 Si2 H7 110.708
C1 Si2 H8 110.708 Si2 C1 H3 110.923
Si2 C1 H4 110.923 Si2 C1 H5 110.923
H3 C1 H4 107.981 H3 C1 H5 107.981
H4 C1 H5 107.981 H6 Si2 H7 108.206
H6 Si2 H8 108.206 H7 Si2 H8 108.206
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.385     -0.490
2 Si 0.214     0.800
3 H 0.104     0.110
4 H 0.104     0.108
5 H 0.104     0.108
6 H -0.047     -0.212
7 H -0.047     -0.212
8 H -0.047     -0.212


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 -0.785 0.785
CHELPG        
AIM        
ESP -0.006 0.000 -0.735 0.735


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.217 0.000 0.000
y 0.000 -23.217 0.000
z 0.000 0.000 -23.481
Traceless
 xyz
x 0.132 0.000 0.000
y 0.000 0.132 0.000
z 0.000 0.000 -0.264
Polar
3z2-r2-0.528
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 5.786 0.000 0.000
y 0.000 5.786 0.000
z 0.000 0.000 6.679


<r2> (average value of r2) Å2
<r2> 50.553
(<r2>)1/2 7.110