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

using model chemistry: B1B95/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 B1B95/cc-pVTZ
 hartrees
Energy at 0K-331.221039
Energy at 298.15K-331.226964
Nuclear repulsion energy62.915060
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 B1B95/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 A1 3064 2932 3.81      
2 A1 2228 2133 64.70      
3 A1 1286 1231 12.83      
4 A1 936 896 207.38      
5 A1 709 679 10.67      
6 A2 201 192 0.00      
7 E 3148 3013 6.40      
7 E 3148 3013 6.40      
8 E 2230 2135 136.81      
8 E 2230 2135 136.83      
9 E 1462 1399 2.56      
9 E 1462 1399 2.56      
10 E 955 914 35.87      
10 E 955 914 35.86      
11 E 883 845 63.62      
11 E 883 845 63.65      
12 E 518 495 8.74      
12 E 518 495 8.73      

Unscaled Zero Point Vibrational Energy (zpe) 13406.9 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 12831.8 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 B1B95/cc-pVTZ
ABC
1.88235 0.36556 0.36556

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pVTZ

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.240
Si2 0.000 0.000 0.632
H3 0.000 -1.017 -1.626
H4 -0.881 0.509 -1.626
H5 0.881 0.509 -1.626
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
C11.87211.08801.08801.08802.77072.77072.7707
Si21.87212.47682.47682.47681.48451.48451.4845
H31.08802.47681.76171.76173.67933.04973.0497
H41.08802.47681.76171.76173.04973.04973.6793
H51.08802.47681.76171.76173.04973.67933.0497
H62.77071.48453.67933.04973.04972.40472.4047
H72.77071.48453.04973.04973.67932.40472.4047
H82.77071.48453.04973.67933.04972.40472.4047

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 110.738 C1 Si2 H7 110.738
C1 Si2 H8 110.738 Si2 C1 H3 110.794
Si2 C1 H4 110.794 Si2 C1 H5 110.794
H3 C1 H4 108.117 H3 C1 H5 108.117
H4 C1 H5 108.117 H6 Si2 H7 108.175
H6 Si2 H8 108.175 H7 Si2 H8 108.175
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.435      
2 Si 0.141      
3 H 0.124      
4 H 0.124      
5 H 0.124      
6 H -0.026      
7 H -0.026      
8 H -0.026      


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 -0.828 0.828
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -22.956 0.000 0.000
y 0.000 -22.956 0.000
z 0.000 0.000 -23.174
Traceless
 xyz
x 0.109 0.000 0.000
y 0.000 0.109 0.000
z 0.000 0.000 -0.218
Polar
3z2-r2-0.436
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 5.761 0.000 0.000
y 0.000 5.761 0.001
z 0.000 0.001 6.649


<r2> (average value of r2) Å2
<r2> 50.044
(<r2>)1/2 7.074