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

using model chemistry: B3LYP/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3 1A1
Energy calculated at B3LYP/6-31G
 hartrees
Energy at 0K-331.169624
Energy at 298.15K-331.164353
Nuclear repulsion energy61.823521
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 B3LYP/6-31G
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 3060 2943 10.46      
2 A1 2152 2071 78.26      
3 A1 1364 1312 14.23      
4 A1 906 871 201.66      
5 A1 673 648 4.85      
6 A2 171 165 0.00      
7 E 3150 3030 12.43      
7 E 3150 3030 12.43      
8 E 2167 2085 189.30      
8 E 2167 2085 189.32      
9 E 1515 1457 6.82      
9 E 1515 1457 6.82      
10 E 945 910 0.10      
10 E 945 910 0.10      
11 E 926 890 105.60      
11 E 926 890 105.60      
12 E 526 506 13.73      
12 E 526 506 13.74      

Unscaled Zero Point Vibrational Energy (zpe) 13390.9 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 12882.1 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 B3LYP/6-31G
See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.272
Si2 0.000 0.000 0.647
H3 0.000 -1.025 -1.657
H4 -0.887 0.512 -1.657
H5 0.887 0.512 -1.657
H6 0.000 1.406 1.183
H7 -1.217 -0.703 1.183
H8 1.217 -0.703 1.183

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.91811.09481.09481.09482.82822.82822.8282
Si21.91812.52122.52122.52121.50451.50451.5045
H31.09482.52121.77481.77483.73773.10633.1063
H41.09482.52121.77481.77483.10633.10633.7377
H51.09482.52121.77481.77483.10633.73773.1063
H62.82821.50453.73773.10633.10632.43492.4349
H72.82821.50453.10633.10633.73772.43492.4349
H82.82821.50453.10633.73773.10632.43492.4349

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 110.871 C1 Si2 H7 110.871
C1 Si2 H8 110.871 Si2 C1 H3 110.615
Si2 C1 H4 110.615 Si2 C1 H5 110.615
H3 C1 H4 108.303 H3 C1 H5 108.303
H4 C1 H5 108.303 H6 Si2 H7 108.036
H6 Si2 H8 108.036 H7 Si2 H8 108.036
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.702      
2 Si 0.541      
3 H 0.166      
4 H 0.166      
5 H 0.166      
6 H -0.113      
7 H -0.113      
8 H -0.113      


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 -0.750 0.750
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.240 0.000 0.000
y 0.000 -23.240 0.000
z 0.000 0.000 -23.250
Traceless
 xyz
x 0.005 0.000 0.000
y 0.000 0.005 0.000
z 0.000 0.000 -0.011
Polar
3z2-r2-0.021
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 4.781 0.000 0.000
y 0.000 4.781 0.000
z 0.000 0.000 5.461


<r2> (average value of r2) Å2
<r2> 51.583
(<r2>)1/2 7.182