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

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-330.959958
Energy at 298.15K-330.965765
Nuclear repulsion energy62.162333
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 PBEPBEultrafine/6-31G*
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 2997 2947 3.77      
2 A 2175 2139 69.99      
3 A 1279 1257 13.71      
4 A 903 888 186.62      
5 A 679 668 7.03      
6 A 192 189 0.00      
7 E 3083 3032 6.77      
7 E 3083 3032 6.77      
8 E 2184 2148 161.92      
8 E 2184 2148 161.94      
9 E 1449 1425 4.06      
9 E 1449 1425 4.06      
10 E 921 905 26.93      
10 E 921 905 26.93      
11 E 873 859 72.08      
11 E 873 859 72.08      
12 E 499 491 6.21      
12 E 499 491 6.21      

Unscaled Zero Point Vibrational Energy (zpe) 13119.9 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 12903.5 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 PBEPBEultrafine/6-31G*
ABC
1.84010 0.35693 0.35693

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

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 -1.648
H4 0.515 0.892 -1.648
H5 0.515 -0.892 -1.648
H6 1.403 -0.000 1.176
H7 -0.702 1.215 1.176
H8 -0.702 -1.215 1.176

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.89331.10281.10281.10282.80612.80612.8061
Si21.89332.50802.50802.50801.50231.50231.5023
H31.10282.50801.78441.78443.72733.09133.0913
H41.10282.50801.78441.78443.09133.09133.7273
H51.10282.50801.78441.78443.09133.72733.0913
H62.80611.50233.72733.09133.09132.43022.4302
H72.80611.50233.09133.09133.72732.43022.4302
H82.80611.50233.09133.72733.09132.43022.4302

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 110.935 C1 Si2 H7 110.935
C1 Si2 H8 110.935 Si2 C1 H3 110.897
Si2 C1 H4 110.897 Si2 C1 H5 110.897
H3 C1 H4 108.009 H3 C1 H5 108.009
H4 C1 H5 108.009 H6 Si2 H7 107.969
H6 Si2 H8 107.969 H7 Si2 H8 107.969
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.694      
2 Si 0.262      
3 H 0.189      
4 H 0.189      
5 H 0.189      
6 H -0.045      
7 H -0.045      
8 H -0.045      


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 -0.897 0.897
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.755 0.000 0.000
y 0.000 -22.755 0.000
z 0.000 0.000 -22.732
Traceless
 xyz
x -0.012 0.000 0.000
y 0.000 -0.012 0.000
z 0.000 0.000 0.023
Polar
3z2-r20.046
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 4.834 0.000 0.000
y 0.000 4.834 0.000
z 0.000 0.000 5.628


<r2> (average value of r2) Å2
<r2> 50.746
(<r2>)1/2 7.124