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

using model chemistry: B1B95/CEP-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 B1B95/CEP-31G*
 hartrees
Energy at 0K-13.071836
Energy at 298.15K-13.077677
Nuclear repulsion energy22.248768
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 B1B95/CEP-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 A 3074 2942 8.10      
2 A 2180 2087 67.08      
3 A 1294 1239 29.20      
4 A 928 888 202.07      
5 A 700 670 10.81      
6 A 185 177 0.00      
7 E 3167 3032 15.30      
7 E 3167 3032 15.32      
8 E 2186 2093 166.42      
8 E 2186 2093 166.57      
9 E 1465 1402 7.23      
9 E 1465 1402 7.23      
10 E 940 900 38.14      
10 E 940 900 38.17      
11 E 878 841 70.04      
11 E 878 841 70.08      
12 E 510 488 6.56      
12 E 510 488 6.58      

Unscaled Zero Point Vibrational Energy (zpe) 13327.0 cm-1
Scaled (by 0.9572) Zero Point Vibrational Energy (zpe) 12756.6 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 B1B95/CEP-31G*
ABC
1.83703 0.35693 0.35693

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G*

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.254
Si2 0.000 0.000 0.639
H3 -1.030 -0.000 -1.647
H4 0.515 0.892 -1.647
H5 0.515 -0.892 -1.647
H6 1.405 -0.000 1.174
H7 -0.703 1.217 1.174
H8 -0.703 -1.217 1.174

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.89371.10211.10211.10212.80542.80542.8054
Si21.89372.50772.50772.50771.50351.50351.5035
H31.10212.50771.78341.78343.72643.08963.0895
H41.10212.50771.78341.78343.08963.08953.7264
H51.10212.50771.78341.78343.08953.72643.0896
H62.80541.50353.72643.08963.08952.43412.4341
H72.80541.50353.08963.08953.72642.43412.4341
H82.80541.50353.08953.72643.08962.43412.4341

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 110.818 C1 Si2 H7 110.818
C1 Si2 H8 110.818 Si2 C1 H3 110.884
Si2 C1 H4 110.884 Si2 C1 H5 110.884
H3 C1 H4 108.022 H3 C1 H5 108.022
H4 C1 H5 108.022 H6 Si2 H7 108.091
H6 Si2 H8 108.091 H7 Si2 H8 108.091
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.490      
2 Si -0.083      
3 H 0.175      
4 H 0.175      
5 H 0.175      
6 H 0.016      
7 H 0.016      
8 H 0.016      


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 -0.735 0.735
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.230 0.000 0.000
y 0.000 -21.230 0.000
z 0.000 0.000 -21.679
Traceless
 xyz
x 0.224 0.000 0.000
y 0.000 0.224 0.000
z 0.000 0.000 -0.448
Polar
3z2-r2-0.896
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 4.424 0.000 0.002
y 0.000 4.417 0.000
z 0.002 0.000 5.377


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000