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

using model chemistry: B3LYPultrafine/aug-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 B3LYPultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-331.262672
Energy at 298.15K-331.268601
HF Energy-331.262672
Nuclear repulsion energy62.662940
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 B3LYPultrafine/aug-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 A 3033 2934 5.59      
2 A 2213 2141 65.81      
3 A 1295 1253 11.26      
4 A 944 913 213.59      
5 A 689 667 11.29      
6 A 197 191 0.00      
7 E 3103 3002 8.38      
7 E 3103 3002 8.38      
8 E 2214 2142 140.71      
8 E 2214 2142 140.72      
9 E 1466 1418 2.48      
9 E 1466 1418 2.48      
10 E 961 930 41.69      
10 E 961 930 41.70      
11 E 889 860 57.57      
11 E 889 860 57.57      
12 E 524 507 10.34      
12 E 524 507 10.34      

Unscaled Zero Point Vibrational Energy (zpe) 13341.6 cm-1
Scaled (by 0.9675) Zero Point Vibrational Energy (zpe) 12908.0 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 B3LYPultrafine/aug-cc-pVTZ
ABC
1.87610 0.36164 0.36164

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/aug-cc-pVTZ

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.247
Si2 0.000 0.000 0.636
H3 1.019 -0.000 -1.636
H4 -0.509 -0.882 -1.636
H5 -0.509 0.882 -1.636
H6 -1.391 -0.000 1.161
H7 0.695 -1.204 1.161
H8 0.695 1.204 1.161

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.88361.09051.09051.09052.78062.78062.7806
Si21.88362.49062.49062.49061.48621.48621.4862
H31.09052.49061.76451.76453.69163.06233.0623
H41.09052.49061.76451.76453.06233.06233.6916
H51.09052.49061.76451.76453.06233.69163.0623
H62.78061.48623.69163.06233.06232.40882.4088
H72.78061.48623.06233.06233.69162.40882.4088
H82.78061.48623.06233.69163.06232.40882.4088

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 110.652 C1 Si2 H7 110.652
C1 Si2 H8 110.652 Si2 C1 H3 110.903
Si2 C1 H4 110.903 Si2 C1 H5 110.903
H3 C1 H4 108.002 H3 C1 H5 108.002
H4 C1 H5 108.002 H6 Si2 H7 108.265
H6 Si2 H8 108.265 H7 Si2 H8 108.265
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.769      
2 Si 1.196      
3 H 0.192      
4 H 0.192      
5 H 0.192      
6 H -0.335      
7 H -0.335      
8 H -0.335      


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 -0.758 0.758
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.235 0.000 0.000
y 0.000 -23.235 0.000
z 0.000 0.000 -23.530
Traceless
 xyz
x 0.148 0.000 0.000
y 0.000 0.148 0.000
z 0.000 0.000 -0.295
Polar
3z2-r2-0.591
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 6.144 0.000 0.000
y 0.000 6.144 0.000
z 0.000 0.000 7.242


<r2> (average value of r2) Å2
<r2> 50.566
(<r2>)1/2 7.111