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

using model chemistry: wB97X-D/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at wB97X-D/TZVP
 hartrees
Energy at 0K-331.209474
Energy at 298.15K-331.215431
HF Energy-331.209474
Nuclear repulsion energy62.618597
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 wB97X-D/TZVP
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 3068 2930 5.69      
2 A1 2189 2091 66.80      
3 A1 1312 1253 20.60      
4 A1 944 902 226.89      
5 A1 714 682 10.20      
6 A2 204 195 0.00      
7 E 3153 3011 7.97      
7 E 3153 3011 7.94      
8 E 2186 2088 147.81      
8 E 2186 2088 147.80      
9 E 1477 1410 5.61      
9 E 1477 1410 5.59      
10 E 966 923 43.84      
10 E 966 923 43.88      
11 E 897 856 65.72      
11 E 897 856 65.70      
12 E 527 503 11.50      
12 E 527 503 11.45      

Unscaled Zero Point Vibrational Energy (zpe) 13420.7 cm-1
Scaled (by 0.955) Zero Point Vibrational Energy (zpe) 12816.8 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 wB97X-D/TZVP
ABC
1.86705 0.36169 0.36169

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/TZVP

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.247
Si2 0.000 0.000 0.636
H3 0.000 -1.020 -1.635
H4 -0.883 0.510 -1.635
H5 0.883 0.510 -1.635
H6 0.000 1.395 1.159
H7 -1.208 -0.698 1.159
H8 1.208 -0.698 1.159

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88321.09141.09141.09142.78142.78142.7814
Si21.88322.49032.49032.49031.48991.48991.4899
H31.09142.49031.76651.76653.69373.06193.0619
H41.09142.49031.76651.76653.06193.06193.6937
H51.09142.49031.76651.76653.06193.69373.0619
H62.78141.48993.69373.06193.06192.41632.4163
H72.78141.48993.06193.06193.69372.41632.4163
H82.78141.48993.06193.69373.06192.41632.4163

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 110.554 C1 Si2 H7 110.554
C1 Si2 H8 110.554 Si2 C1 H3 110.859
Si2 C1 H4 110.859 Si2 C1 H5 110.859
H3 C1 H4 108.049 H3 C1 H5 108.049
H4 C1 H5 108.049 H6 Si2 H7 108.367
H6 Si2 H8 108.367 H7 Si2 H8 108.367
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.527      
2 Si 0.434      
3 H 0.136      
4 H 0.136      
5 H 0.136      
6 H -0.105      
7 H -0.105      
8 H -0.105      


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 -0.728 0.728
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.979 0.000 0.000
y 0.000 -22.979 0.000
z 0.000 0.000 -23.315
Traceless
 xyz
x 0.168 0.000 0.000
y 0.000 0.168 0.000
z 0.000 0.000 -0.336
Polar
3z2-r2-0.672
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 5.533 0.000 0.000
y 0.000 5.536 -0.001
z 0.000 -0.001 6.173


<r2> (average value of r2) Å2
<r2> 50.435
(<r2>)1/2 7.102