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

using model chemistry: B1B95/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at B1B95/6-311G**
 hartrees
Energy at 0K-331.212072
Energy at 298.15K-331.217988
Nuclear repulsion energy62.814280
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 B1B95/6-311G**
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 3055 2933 4.94      
2 A1 2230 2141 66.38      
3 A1 1290 1238 17.58      
4 A1 936 899 226.52      
5 A1 706 678 10.12      
6 A2 197 189 0.00      
7 E 3141 3016 7.66      
7 E 3141 3016 7.66      
8 E 2232 2143 138.90      
8 E 2232 2143 138.91      
9 E 1460 1402 4.92      
9 E 1460 1402 4.92      
10 E 955 917 39.35      
10 E 955 917 39.35      
11 E 886 851 71.82      
11 E 886 851 71.83      
12 E 518 497 9.99      
12 E 518 497 9.98      

Unscaled Zero Point Vibrational Energy (zpe) 13399.0 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 12864.4 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 B1B95/6-311G**
ABC
1.87669 0.36441 0.36441

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.242
Si2 0.000 0.000 0.633
H3 0.000 -1.019 -1.630
H4 -0.883 0.510 -1.630
H5 0.883 0.510 -1.630
H6 0.000 1.390 1.158
H7 -1.204 -0.695 1.158
H8 1.204 -0.695 1.158

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.87481.09111.09111.09112.77342.77342.7734
Si21.87482.48262.48262.48261.48571.48571.4857
H31.09112.48261.76581.76583.68543.05473.0547
H41.09112.48261.76581.76583.05473.05473.6854
H51.09112.48261.76581.76583.05473.68543.0547
H62.77341.48573.68543.05473.05472.40732.4073
H72.77341.48573.05473.05473.68542.40732.4073
H82.77341.48573.05473.68543.05472.40732.4073

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 110.700 C1 Si2 H7 110.700
C1 Si2 H8 110.700 Si2 C1 H3 110.873
Si2 C1 H4 110.873 Si2 C1 H5 110.873
H3 C1 H4 108.034 H3 C1 H5 108.034
H4 C1 H5 108.034 H6 Si2 H7 108.215
H6 Si2 H8 108.215 H7 Si2 H8 108.215
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.658      
2 Si 0.561      
3 H 0.151      
4 H 0.151      
5 H 0.151      
6 H -0.119      
7 H -0.119      
8 H -0.119      


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 -0.775 0.775
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.984 0.000 0.000
y 0.000 -22.984 0.000
z 0.000 0.000 -23.225
Traceless
 xyz
x 0.121 0.000 0.000
y 0.000 0.121 0.000
z 0.000 0.000 -0.241
Polar
3z2-r2-0.482
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 5.392 0.000 0.000
y 0.000 5.392 0.000
z 0.000 0.000 6.028


<r2> (average value of r2) Å2
<r2> 50.181
(<r2>)1/2 7.084