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

using model chemistry: B1B95/aug-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 B1B95/aug-cc-pVTZ
 hartrees
Energy at 0K-331.221672
Energy at 298.15K-331.227597
HF Energy-331.221672
Nuclear repulsion energy62.928216
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/aug-cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3064 2937 4.07      
2 A1 2228 2136 64.51      
3 A1 1284 1230 13.45      
4 A1 935 896 206.88      
5 A1 709 679 10.19      
6 A2 202 194 0.00      
7 E 3147 3016 6.15      
7 E 3147 3016 6.15      
8 E 2230 2138 137.11      
8 E 2230 2138 137.14      
9 E 1461 1400 2.68      
9 E 1461 1400 2.68      
10 E 955 915 35.67      
10 E 955 915 35.66      
11 E 882 845 61.51      
11 E 882 845 61.54      
12 E 517 495 9.23      
12 E 517 495 9.22      

Unscaled Zero Point Vibrational Energy (zpe) 13401.0 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 12844.9 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/aug-cc-pVTZ
ABC
1.88233 0.36578 0.36578

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.240
Si2 0.000 0.000 0.632
H3 0.000 -1.017 -1.626
H4 -0.881 0.509 -1.626
H5 0.881 0.509 -1.626
H6 0.000 1.389 1.155
H7 -1.203 -0.695 1.155
H8 1.203 -0.695 1.155

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.87251.08801.08801.08802.76922.76922.7692
Si21.87252.47722.47722.47721.48441.48441.4844
H31.08802.47721.76181.76183.67813.04793.0479
H41.08802.47721.76181.76183.04793.04793.6781
H51.08802.47721.76181.76183.04793.67813.0479
H62.76921.48443.67813.04793.04792.40622.4062
H72.76921.48443.04793.04793.67812.40622.4062
H82.76921.48443.04793.67813.04792.40622.4062

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 110.631 C1 Si2 H7 110.631
C1 Si2 H8 110.631 Si2 C1 H3 110.790
Si2 C1 H4 110.790 Si2 C1 H5 110.790
H3 C1 H4 108.121 H3 C1 H5 108.121
H4 C1 H5 108.121 H6 Si2 H7 108.287
H6 Si2 H8 108.287 H7 Si2 H8 108.287
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.022      
2 Si 0.767      
3 H 0.297      
4 H 0.297      
5 H 0.297      
6 H -0.212      
7 H -0.212      
8 H -0.212      


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 -0.806 0.806
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.959 0.000 0.000
y 0.000 -22.959 0.000
z 0.000 0.000 -23.212
Traceless
 xyz
x 0.127 0.000 0.000
y 0.000 0.127 0.000
z 0.000 0.000 -0.253
Polar
3z2-r2-0.506
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 6.083 0.000 0.000
y 0.000 6.083 0.001
z 0.000 0.001 7.163


<r2> (average value of r2) Å2
<r2> 50.034
(<r2>)1/2 7.073