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

using model chemistry: B3PW91/aug-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 B3PW91/aug-cc-pVDZ
 hartrees
Energy at 0K-331.164230
Energy at 298.15K-331.158948
Nuclear repulsion energy62.320135
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 B3PW91/aug-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 3046 2938 5.79      
2 A1 2194 2116 61.59      
3 A1 1261 1216 11.07      
4 A1 918 886 192.64      
5 A1 690 665 9.91      
6 A2 191 184 0.00      
7 E 3139 3028 7.53      
7 E 3139 3028 7.53      
8 E 2199 2121 131.61      
8 E 2199 2121 131.62      
9 E 1428 1377 2.59      
9 E 1428 1377 2.59      
10 E 943 909 32.68      
10 E 943 909 32.68      
11 E 872 841 58.48      
11 E 872 841 58.48      
12 E 508 490 8.41      
12 E 508 490 8.41      

Unscaled Zero Point Vibrational Energy (zpe) 13237.7 cm-1
Scaled (by 0.9646) Zero Point Vibrational Energy (zpe) 12769.1 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 B3PW91/aug-cc-pVDZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/aug-cc-pVDZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.251
Si2 0.000 0.000 0.638
H3 0.000 -1.027 -1.643
H4 -0.889 0.513 -1.643
H5 0.889 0.513 -1.643
H6 0.000 1.403 1.167
H7 -1.215 -0.701 1.167
H8 1.215 -0.701 1.167

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88931.09901.09901.09902.79532.79532.7953
Si21.88932.50132.50132.50131.49891.49891.4989
H31.09902.50131.77871.77873.71423.07803.0780
H41.09902.50131.77871.77873.07803.07803.7142
H51.09902.50131.77871.77873.07803.71423.0780
H62.79531.49893.71423.07803.07802.42942.4294
H72.79531.49893.07803.07803.71422.42942.4294
H82.79531.49893.07803.71423.07802.42942.4294

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 110.650 C1 Si2 H7 110.650
C1 Si2 H8 110.650 Si2 C1 H3 110.866
Si2 C1 H4 110.866 Si2 C1 H5 110.866
H3 C1 H4 108.042 H3 C1 H5 108.042
H4 C1 H5 108.042 H6 Si2 H7 108.268
H6 Si2 H8 108.268 H7 Si2 H8 108.268
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.427      
2 Si -0.165      
3 H -0.239      
4 H -0.239      
5 H -0.239      
6 H 0.151      
7 H 0.151      
8 H 0.151      


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 -0.777 0.777
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.055 0.000 0.000
y 0.000 -23.055 0.000
z 0.000 0.000 -23.294
Traceless
 xyz
x 0.119 0.000 0.000
y 0.000 0.119 0.000
z 0.000 0.000 -0.239
Polar
3z2-r2-0.477
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 6.213 0.000 0.000
y 0.000 6.213 0.000
z 0.000 0.000 7.313


<r2> (average value of r2) Å2
<r2> 50.788
(<r2>)1/2 7.127