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

using model chemistry: BLYP/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 BLYP/6-31G*
 hartrees
Energy at 0K-331.139066
Energy at 298.15K-331.144896
HF Energy-331.139066
Nuclear repulsion energy62.061569
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 BLYP/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 A1 2978 2953 6.55      
2 A1 2171 2153 73.27      
3 A1 1295 1285 8.40      
4 A1 924 916 205.88      
5 A1 665 659 7.62      
6 A2 191 189 0.00      
7 E 3049 3025 12.31      
7 E 3049 3025 12.31      
8 E 2179 2161 171.72      
8 E 2179 2161 171.74      
9 E 1463 1451 2.54      
9 E 1463 1451 2.54      
10 E 935 927 37.90      
10 E 935 927 37.90      
11 E 882 875 65.74      
11 E 882 875 65.73      
12 E 508 504 7.57      
12 E 508 504 7.57      

Unscaled Zero Point Vibrational Energy (zpe) 13127.4 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 13021.0 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 BLYP/6-31G*
ABC
1.84605 0.35454 0.35454

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.259
Si2 0.000 0.000 0.642
H3 0.000 -1.029 -1.654
H4 -0.891 0.515 -1.654
H5 0.891 0.515 -1.654
H6 0.000 1.401 1.176
H7 -1.214 -0.701 1.176
H8 1.214 -0.701 1.176

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.90071.10241.10241.10242.80902.80902.8090
Si21.90072.51602.51602.51601.49961.49961.4996
H31.10242.51601.78251.78253.73013.09643.0964
H41.10242.51601.78251.78253.09643.09643.7301
H51.10242.51601.78251.78253.09643.73013.0964
H62.80901.49963.73013.09643.09642.42732.4273
H72.80901.49963.09643.09643.73012.42732.4273
H82.80901.49963.09643.73013.09642.42732.4273

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 110.849 C1 Si2 H7 110.849
C1 Si2 H8 110.849 Si2 C1 H3 111.005
Si2 C1 H4 111.005 Si2 C1 H5 111.005
H3 C1 H4 107.895 H3 C1 H5 107.895
H4 C1 H5 107.895 H6 Si2 H7 108.059
H6 Si2 H8 108.059 H7 Si2 H8 108.059
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.600      
2 Si 0.296      
3 H 0.159      
4 H 0.159      
5 H 0.159      
6 H -0.058      
7 H -0.058      
8 H -0.058      


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 -0.855 0.855
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.865 0.000 0.000
y 0.000 -22.865 0.000
z 0.000 0.000 -22.885
Traceless
 xyz
x 0.010 0.000 0.000
y 0.000 0.010 0.000
z 0.000 0.000 -0.020
Polar
3z2-r2-0.040
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 4.784 0.000 0.000
y 0.000 4.784 0.000
z 0.000 0.000 5.594


<r2> (average value of r2) Å2
<r2> 50.999
(<r2>)1/2 7.141