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

using model chemistry: HF/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at HF/6-31G*
 hartrees
Energy at 0K-330.272414
Energy at 298.15K 
HF Energy-330.272414
Nuclear repulsion energy62.722182
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 HF/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3197 2873 9.99      
2 A1 2374 2133 102.23      
3 A1 1455 1307 18.33      
4 A1 1040 935 334.20      
5 A1 725 651 9.35      
6 A2 194 174 0.00      
7 E 3269 2937 18.98      
7 E 3269 2937 18.98      
8 E 2362 2122 256.93      
8 E 2362 2122 256.93      
9 E 1607 1444 3.01      
9 E 1607 1444 3.01      
10 E 1045 939 94.95      
10 E 1045 939 94.95      
11 E 971 873 71.94      
11 E 971 873 71.94      
12 E 563 506 17.86      
12 E 563 506 17.86      
1 0     0.00      
1 0     0.00      
1 -0.01     0.00      
1 0     0.41      
1 0 0 0 0.00      
1 -0.14     0.00      
1 0     0.00      
1 0     0.00      
1 0     0.00      
1 0     -0.14      
1 -0.06     0.00      
1 0 0i 0i 0.00      
1 0     0.00      
1 0     0.00      
1 0     0.00      
1 0     -0.05      
1 -0.09     0.00      
1 0 0i 0i 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 14308.7 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 12856.4 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 HF/6-31G*
ABC
1.89558 0.36063 0.36063

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G*

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.249
Si2 0.000 0.000 0.639
H3 0.000 -1.013 -1.641
H4 -0.877 0.507 -1.641
H5 0.877 0.507 -1.641
H6 0.000 1.384 1.159
H7 -1.198 -0.692 1.159
H8 1.198 -0.692 1.159

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88811.08611.08611.08612.77752.77752.7775
Si21.88812.49432.49432.49431.47831.47831.4783
H31.08612.49431.75491.75493.68543.06213.0621
H41.08612.49431.75491.75493.06213.06213.6854
H51.08612.49431.75491.75493.06213.68543.0621
H62.77751.47833.68543.06213.06212.39682.3968
H72.77751.47833.06213.06213.68542.39682.3968
H82.77751.47833.06213.68543.06212.39682.3968

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 110.602 C1 Si2 H7 110.602
C1 Si2 H8 110.602 Si2 C1 H3 111.111
Si2 C1 H4 111.111 Si2 C1 H5 111.111
H3 C1 H4 107.783 H3 C1 H5 107.783
H4 C1 H5 107.783 H6 Si2 H7 108.317
H6 Si2 H8 108.317 H7 Si2 H8 108.317
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.783      
2 Si 0.683      
3 H 0.183      
4 H 0.183      
5 H 0.183      
6 H -0.150      
7 H -0.150      
8 H -0.150      


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 -0.677 0.677
CHELPG 0.000 0.000 -0.656 0.656
AIM 0.000 0.000 -0.760 0.760
ESP -0.004 0.000 0.640 0.640


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.201 -0.001 -0.011
y -0.001 -23.201 0.000
z -0.011 0.000 -23.510
Traceless
 xyz
x 0.154 -0.001 -0.011
y -0.001 0.154 0.000
z -0.011 0.000 -0.309
Polar
3z2-r2-0.618
x2-y20.000
xy-0.001
xz-0.011
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.453 -0.013 0.015
y -0.013 4.453 0.000
z 0.015 0.000 4.879


<r2> (average value of r2) Å2
<r2> 50.559
(<r2>)1/2 7.111