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

using model chemistry: B1B95/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-331.188018
Energy at 298.15K-331.193919
Nuclear repulsion energy62.473846
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/cc-pVDZ
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 3061 2943 4.86      
2 A1 2196 2111 63.10      
3 A1 1259 1210 9.09      
4 A1 922 887 197.53      
5 A1 702 675 10.62      
6 A2 207 199 0.00      
7 E 3159 3036 4.34      
7 E 3159 3036 4.34      
8 E 2203 2117 130.79      
8 E 2203 2117 130.76      
9 E 1430 1375 2.79      
9 E 1430 1375 2.78      
10 E 945 908 31.06      
10 E 945 908 31.06      
11 E 873 839 66.95      
11 E 873 839 66.95      
12 E 513 493 7.22      
12 E 513 493 7.23      

Unscaled Zero Point Vibrational Energy (zpe) 13296.4 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 12780.5 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 B1B95/cc-pVDZ
ABC
1.84865 0.36124 0.36124

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pVDZ

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 -1.028 -1.636
H4 -0.890 0.514 -1.636
H5 0.890 0.514 -1.636
H6 0.000 1.400 1.164
H7 -1.212 -0.700 1.164
H8 1.212 -0.700 1.164

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88251.09901.09901.09902.78792.78792.7879
Si21.88252.49322.49322.49321.49631.49631.4963
H31.09902.49321.78031.78033.70593.06873.0687
H41.09902.49321.78031.78033.06873.06873.7059
H51.09902.49321.78031.78033.06873.70593.0687
H62.78791.49633.70593.06873.06872.42462.4246
H72.78791.49633.06873.06873.70592.42462.4246
H82.78791.49633.06873.70593.06872.42462.4246

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 110.683 C1 Si2 H7 110.683
C1 Si2 H8 110.683 Si2 C1 H3 110.727
Si2 C1 H4 110.727 Si2 C1 H5 110.727
H3 C1 H4 108.187 H3 C1 H5 108.187
H4 C1 H5 108.187 H6 Si2 H7 108.233
H6 Si2 H8 108.233 H7 Si2 H8 108.233
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.226      
2 Si 0.234      
3 H 0.058      
4 H 0.058      
5 H 0.058      
6 H -0.060      
7 H -0.060      
8 H -0.060      


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 -0.827 0.827
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.836 0.000 0.000
y 0.000 -22.836 0.000
z 0.000 0.000 -22.992
Traceless
 xyz
x 0.078 0.000 0.000
y 0.000 0.078 0.000
z 0.000 0.000 -0.155
Polar
3z2-r2-0.311
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 5.348 0.000 0.000
y 0.000 5.348 0.000
z 0.000 0.000 6.077


<r2> (average value of r2) Å2
<r2> 50.422
(<r2>)1/2 7.101