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

using model chemistry: mPW1PW91/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at mPW1PW91/cc-pVDZ
 hartrees
Energy at 0K-331.201775
Energy at 298.15K-331.196525
Nuclear repulsion energy62.386395
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 mPW1PW91/cc-pVDZ
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 3067 2939 5.12      
2 A1 2208 2116 63.59      
3 A1 1270 1217 9.95      
4 A1 929 890 196.82      
5 A1 699 670 10.90      
6 A2 205 197 0.00      
7 E 3166 3034 4.18      
7 E 3166 3034 4.18      
8 E 2213 2121 133.18      
8 E 2213 2121 133.19      
9 E 1440 1380 3.06      
9 E 1440 1380 3.06      
10 E 950 910 32.74      
10 E 950 910 32.74      
11 E 880 844 67.34      
11 E 880 844 67.34      
12 E 517 495 7.37      
12 E 517 495 7.37      

Unscaled Zero Point Vibrational Energy (zpe) 13354.4 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 12797.5 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 mPW1PW91/cc-pVDZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.249
Si2 0.000 0.000 0.637
H3 0.000 -1.029 -1.638
H4 -0.891 0.514 -1.638
H5 0.891 0.514 -1.638
H6 0.000 1.402 1.165
H7 -1.214 -0.701 1.165
H8 1.214 -0.701 1.165

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88581.09981.09981.09982.79202.79202.7920
Si21.88582.49672.49672.49671.49831.49831.4983
H31.09982.49671.78151.78153.71063.07293.0729
H41.09982.49671.78151.78153.07293.07293.7106
H51.09982.49671.78151.78153.07293.71063.0729
H62.79201.49833.71063.07293.07292.42812.4281
H72.79201.49833.07293.07293.71062.42812.4281
H82.79201.49833.07293.71063.07292.42812.4281

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 110.666 C1 Si2 H7 110.666
C1 Si2 H8 110.666 Si2 C1 H3 110.729
Si2 C1 H4 110.729 Si2 C1 H5 110.729
H3 C1 H4 108.185 H3 C1 H5 108.185
H4 C1 H5 108.185 H6 Si2 H7 108.250
H6 Si2 H8 108.250 H7 Si2 H8 108.250
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.267      
2 Si 0.226      
3 H 0.069      
4 H 0.069      
5 H 0.069      
6 H -0.055      
7 H -0.055      
8 H -0.055      


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 -0.816 0.816
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.830 0.000 0.000
y 0.000 -22.830 0.000
z 0.000 0.000 -23.010
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 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> 50.530
(<r2>)1/2 7.108