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

using model chemistry: HF/daug-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 HF/daug-cc-pVTZ
 hartrees
Energy at 0K-330.323371
Energy at 298.15K-330.329453
HF Energy-330.323371
Nuclear repulsion energy62.844349
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 HF/daug-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 A1 3152 2852 8.54      
2 A1 2308 2088 82.36      
3 A1 1408 1274 14.99      
4 A1 1029 931 268.11      
5 A1 724 655 11.85      
6 A2 212 191 0.00      
7 E 3221 2914 17.38      
7 E 3221 2914 17.38      
8 E 2294 2075 188.63      
8 E 2294 2075 188.63      
9 E 1576 1425 2.02      
9 E 1576 1425 2.02      
10 E 1035 936 67.49      
10 E 1035 936 67.49      
11 E 952 861 62.27      
11 E 952 861 62.27      
12 E 558 505 14.20      
12 E 558 505 14.20      

Unscaled Zero Point Vibrational Energy (zpe) 14052.5 cm-1
Scaled (by 0.9046) Zero Point Vibrational Energy (zpe) 12711.9 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 HF/daug-cc-pVTZ
ABC
1.88966 0.36322 0.36322

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

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.245
Si2 0.000 0.000 0.636
H3 0.000 -1.013 -1.631
H4 -0.877 0.507 -1.631
H5 0.877 0.507 -1.631
H6 0.000 1.387 1.156
H7 -1.201 -0.694 1.156
H8 1.201 -0.694 1.156

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88071.08431.08431.08432.77312.77312.7731
Si21.88072.48302.48302.48301.48161.48161.4816
H31.08432.48301.75491.75493.67853.05203.0520
H41.08432.48301.75491.75493.05203.05203.6785
H51.08432.48301.75491.75493.05203.67853.0520
H62.77311.48163.67853.05203.05202.40252.4025
H72.77311.48163.05203.05203.67852.40252.4025
H82.77311.48163.05203.67853.05202.40252.4025

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 110.570 C1 Si2 H7 110.570
C1 Si2 H8 110.570 Si2 C1 H3 110.863
Si2 C1 H4 110.863 Si2 C1 H5 110.863
H3 C1 H4 108.044 H3 C1 H5 108.044
H4 C1 H5 108.044 H6 Si2 H7 108.350
H6 Si2 H8 108.350 H7 Si2 H8 108.350
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/daug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.904      
2 Si 2.273      
3 H 0.445      
4 H 0.445      
5 H 0.445      
6 H -0.569      
7 H -0.569      
8 H -0.569      


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 -0.711 0.711
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.273 0.000 0.000
y 0.000 -23.273 0.000
z 0.000 0.000 -23.659
Traceless
 xyz
x 0.193 0.000 0.000
y 0.000 0.193 0.000
z 0.000 0.000 -0.386
Polar
3z2-r2-0.772
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 5.701 0.000 0.000
y 0.000 5.701 0.000
z 0.000 0.000 6.575


<r2> (average value of r2) Å2
<r2> 50.419
(<r2>)1/2 7.101