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

using model chemistry: B3PW91/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 B3PW91/cc-pVTZ
 hartrees
Energy at 0K-331.193718
Energy at 298.15K-331.188473
Nuclear repulsion energy62.691006
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 B3PW91/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 3042 2925 4.03      
2 A1 2208 2123 63.33      
3 A1 1284 1235 12.42      
4 A1 934 898 200.33      
5 A1 699 672 11.19      
6 A2 197 189 0.00      
7 E 3124 3004 6.43      
7 E 3124 3004 6.43      
8 E 2211 2126 133.33      
8 E 2211 2126 133.34      
9 E 1456 1400 2.64      
9 E 1456 1400 2.64      
10 E 951 915 35.36      
10 E 951 915 35.36      
11 E 883 849 62.19      
11 E 883 849 62.19      
12 E 520 500 8.58      
12 E 520 500 8.58      

Unscaled Zero Point Vibrational Energy (zpe) 13326.8 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 12815.0 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 B3PW91/cc-pVTZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.245
Si2 0.000 0.000 0.634
H3 0.000 -1.020 -1.633
H4 -0.883 0.510 -1.633
H5 0.883 0.510 -1.633
H6 0.000 1.393 1.163
H7 -1.206 -0.696 1.163
H8 1.206 -0.696 1.163

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.87901.09151.09151.09152.78112.78112.7811
Si21.87902.48652.48652.48651.48961.48961.4896
H31.09152.48651.76661.76663.69293.06213.0621
H41.09152.48651.76661.76663.06213.06213.6929
H51.09152.48651.76661.76663.06213.69293.0621
H62.78111.48963.69293.06213.06212.41242.4124
H72.78111.48963.06213.06213.69292.41242.4124
H82.78111.48963.06213.69293.06212.41242.4124

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 110.768 C1 Si2 H7 110.768
C1 Si2 H8 110.768 Si2 C1 H3 110.857
Si2 C1 H4 110.857 Si2 C1 H5 110.857
H3 C1 H4 108.050 H3 C1 H5 108.050
H4 C1 H5 108.050 H6 Si2 H7 108.144
H6 Si2 H8 108.144 H7 Si2 H8 108.144
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.366      
2 Si 0.186      
3 H 0.100      
4 H 0.100      
5 H 0.100      
6 H -0.040      
7 H -0.040      
8 H -0.040      


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 -0.829 0.829
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.943 0.000 0.000
y 0.000 -22.943 0.000
z 0.000 0.000 -23.161
Traceless
 xyz
x 0.109 0.000 0.000
y 0.000 0.109 0.000
z 0.000 0.000 -0.219
Polar
3z2-r2-0.437
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 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 50.302
(<r2>)1/2 7.092