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

using model chemistry: B3LYP/6-311+G(3df,2p)

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/6-311+G(3df,2p)
 hartrees
Energy at 0K-331.261189
Energy at 298.15K-331.255961
Nuclear repulsion energy62.808263
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/6-311+G(3df,2p)
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 3028 2929 5.33      
2 A1 2215 2142 66.01      
3 A1 1298 1255 13.13      
4 A1 950 918 214.84      
5 A1 695 672 11.36      
6 A2 198 192 0.00      
7 E 3100 2998 8.34      
7 E 3100 2998 8.34      
8 E 2214 2141 139.34      
8 E 2214 2141 139.36      
9 E 1467 1419 2.64      
9 E 1467 1419 2.64      
10 E 963 931 41.65      
10 E 963 931 41.66      
11 E 889 860 58.36      
11 E 889 860 58.36      
12 E 524 507 9.82      
12 E 524 507 9.81      

Unscaled Zero Point Vibrational Energy (zpe) 13349.8 cm-1
Scaled (by 0.967) Zero Point Vibrational Energy (zpe) 12909.2 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/6-311+G(3df,2p)
See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-311+G(3df,2p)

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.243
Si2 0.000 0.000 0.634
H3 0.000 -1.019 -1.632
H4 -0.882 0.509 -1.632
H5 0.882 0.509 -1.632
H6 0.000 1.388 1.158
H7 -1.202 -0.694 1.158
H8 1.202 -0.694 1.158

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.87711.09061.09061.09062.77332.77332.7733
Si21.87712.48462.48462.48461.48331.48331.4833
H31.09062.48461.76481.76483.68473.05533.0553
H41.09062.48461.76481.76483.05533.05533.6847
H51.09062.48461.76481.76483.05533.68473.0553
H62.77331.48333.68473.05533.05532.40342.4034
H72.77331.48333.05533.05533.68472.40342.4034
H82.77331.48333.05533.68473.05532.40342.4034

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 110.693 C1 Si2 H7 110.693
C1 Si2 H8 110.693 Si2 C1 H3 110.896
Si2 C1 H4 110.896 Si2 C1 H5 110.896
H3 C1 H4 108.009 H3 C1 H5 108.009
H4 C1 H5 108.009 H6 Si2 H7 108.222
H6 Si2 H8 108.222 H7 Si2 H8 108.222
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.624      
2 Si 0.416      
3 H 0.148      
4 H 0.148      
5 H 0.148      
6 H -0.079      
7 H -0.079      
8 H -0.079      


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 -0.783 0.783
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.947 0.000 0.000
y 0.000 5.947 0.000
z 0.000 0.000 7.053


<r2> (average value of r2) Å2
<r2> 50.357
(<r2>)1/2 7.096