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

using model chemistry: B3LYP/aug-cc-pVQZ

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/aug-cc-pVQZ
 hartrees
Energy at 0K-331.271468
Energy at 298.15K-331.277394
Nuclear repulsion energy62.793526
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/aug-cc-pVQZ
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 3032 2938 5.33      
2 A 2221 2152 65.63      
3 A 1295 1255 12.32      
4 A 950 921 216.22      
5 A 692 670 11.45      
6 A 196 190 0.00      
7 E 3104 3008 8.25      
7 E 3104 3008 8.25      
8 E 2217 2148 140.65      
8 E 2217 2148 140.68      
9 E 1466 1420 2.50      
9 E 1466 1420 2.50      
10 E 964 934 42.59      
10 E 964 934 42.59      
11 E 890 862 58.06      
11 E 890 862 58.06      
12 E 524 508 10.13      
12 E 524 508 10.13      

Unscaled Zero Point Vibrational Energy (zpe) 13358.0 cm-1
Scaled (by 0.9689) Zero Point Vibrational Energy (zpe) 12942.5 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/aug-cc-pVQZ
ABC
1.88231 0.36335 0.36335

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVQZ

Point Group is C3

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.244
Si2 0.000 0.000 0.635
H3 -1.019 -0.000 -1.632
H4 0.509 0.882 -1.632
H5 0.509 -0.882 -1.632
H6 1.387 -0.000 1.158
H7 -0.694 1.201 1.158
H8 -0.694 -1.201 1.158

Atom - Atom Distances (Å)
  C1 Si2 H3 H4 H5 H6 H7 H8
C11.87911.08981.08981.08982.77412.77412.7741
Si21.87912.48512.48512.48511.48271.48271.4827
H31.08982.48511.76421.76423.68413.05503.0550
H41.08982.48511.76421.76423.05503.05503.6841
H51.08982.48511.76421.76423.05503.68413.0550
H62.77411.48273.68413.05503.05502.40292.4029
H72.77411.48273.05503.05503.68412.40292.4029
H82.77411.48273.05503.68413.05502.40292.4029

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 110.666 C1 Si2 H7 110.666
C1 Si2 H8 110.666 Si2 C1 H3 110.837
Si2 C1 H4 110.837 Si2 C1 H5 110.837
H3 C1 H4 108.071 H3 C1 H5 108.071
H4 C1 H5 108.071 H6 Si2 H7 108.251
H6 Si2 H8 108.251 H7 Si2 H8 108.251
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -1.019      
2 Si 1.170      
3 H 0.225      
4 H 0.225      
5 H 0.225      
6 H -0.276      
7 H -0.276      
8 H -0.276      


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 -0.762 0.762
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.197 0.000 0.000
y 0.000 -23.197 0.000
z 0.000 0.000 -23.508
Traceless
 xyz
x 0.156 0.000 0.000
y 0.000 0.156 0.000
z 0.000 0.000 -0.311
Polar
3z2-r2-0.622
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 6.112 0.000 0.000
y 0.000 6.112 0.000
z 0.000 0.000 7.206


<r2> (average value of r2) Å2
<r2> 50.383
(<r2>)1/2 7.098