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

using model chemistry: PBEPBE/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 PBEPBE/cc-pVTZ
 hartrees
Energy at 0K-331.008603
Energy at 298.15K-331.003355
Nuclear repulsion energy62.331864
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 PBEPBE/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 A 2978 2957 3.98      
2 A 2149 2134 58.72      
3 A 1239 1231 9.87      
4 A 897 891 180.33      
5 A 681 676 10.31      
6 A 190 189 0.00      
7 E 3058 3037 6.08      
7 E 3058 3037 6.08      
8 E 2157 2142 120.06      
8 E 2157 2142 120.08      
9 E 1413 1403 2.60      
9 E 1413 1403 2.60      
10 E 918 912 26.67      
10 E 918 912 26.66      
11 E 856 850 59.54      
11 E 856 850 59.54      
12 E 502 499 7.34      
12 E 502 499 7.34      

Unscaled Zero Point Vibrational Energy (zpe) 12971.3 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 12881.8 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 PBEPBE/cc-pVTZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/cc-pVTZ

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.251
Si2 0.000 0.000 0.637
H3 -1.027 -0.000 -1.641
H4 0.513 0.889 -1.641
H5 0.514 -0.889 -1.641
H6 1.402 -0.000 1.169
H7 -0.701 1.214 1.169
H8 -0.701 -1.214 1.169

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88861.09841.09841.09842.79712.79712.7971
Si21.88862.49942.49942.49941.49961.49961.4996
H31.09842.49941.77831.77833.71463.07903.0787
H41.09842.49941.77831.77833.07903.07873.7146
H51.09842.49941.77831.77833.07873.71463.0790
H62.79711.49963.71463.07903.07872.42882.4288
H72.79711.49963.07903.07873.71462.42882.4288
H82.79711.49963.07873.71463.07902.42882.4288

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 110.763 C1 Si2 H7 110.763
C1 Si2 H8 110.763 Si2 C1 H3 110.812
Si2 C1 H4 110.812 Si2 C1 H5 110.812
H3 C1 H4 108.098 H3 C1 H5 108.098
H4 C1 H5 108.098 H6 Si2 H7 108.149
H6 Si2 H8 108.149 H7 Si2 H8 108.149
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.368      
2 Si 0.166      
3 H 0.105      
4 H 0.105      
5 H 0.105      
6 H -0.038      
7 H -0.038      
8 H -0.038      


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 -0.849 0.849
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.157 0.000 0.000
y 0.000 -23.157 0.000
z 0.000 0.000 -23.338
Traceless
 xyz
x 0.090 0.000 0.000
y 0.000 0.090 0.000
z 0.000 0.000 -0.180
Polar
3z2-r2-0.360
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 6.013 0.000 0.000
y 0.000 6.013 0.000
z 0.000 0.000 6.994


<r2> (average value of r2) Å2
<r2> 50.826
(<r2>)1/2 7.129